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If you own a Subaru Outback, worn or damaged upper control arms can undermine steering feel, alignment stability, and tire life. Choosing the right upper control arm matters because fitment, bushing type, and ball-joint quality directly affect handling and long-term reliability. This guide presents seven shortlisted upper control arms selected for the Outback, with practical notes on fitment, durability, and installation considerations. Read on to understand which attributes matter most for road use and how each pick addresses common control arm symptoms and alignment issues.
Looking for other parts? See all Subaru Outback parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Detroit Axle Rear Upper Control Arms Kit with Ball Joints and Sway Bar Links for 2010–2018 Subaru Outback |  |
| Best Quality Built to a higher standard if you want something more solid | Metrix Premium Chassis Parts Left Rear Upper Control Arm with Ball Joint |  |
| Best Value The sweet spot between price and what you get | TRQ Rear Left Upper Control Arm with Ball Joint for 2010–2019 Subaru Outback |  |
| Best Budget The cheapest option that still gets the job done reliably | TRQ Rear Upper Control Arm Set (Driver and Passenger) |  |
| Highest Rated A top-rated pick with lots of positive feedback | Dorman Rear Driver Side Upper Lateral Arm 527-207 |  |
| Most Popular A crowd favorite that many people choose with confidence | Detroit Axle Rear Upper Control Arms with Ball Joints for 2010–2018 Subaru Outback, 2‑Pack |  |
| Best Seller A high-volume bestseller chosen again and again | Detroit Axle Rear Right Upper Control Arm with Ball Joint for Subaru Outback (2010–2018) |  |
1. Detroit Axle Rear Upper Control Arms Kit with Ball Joints and Sway Bar Links for 2010–2018 Subaru Outback
| Fitment | 2010–2018 Subaru Outback |
|---|---|
| Kit contents | 2 rear upper control arms with ball joints, 2 rear sway bar links |
| Manufacturer | Detroit Axle |
| Warranty | 10-Year Warranty |
This Detroit Axle kit replaces the two rear upper control arms and adds two rear sway bar links to restore rear suspension geometry and steering stability on Subaru Outbacks from 2010 through 2018. The control arms include integrated ball joints so installation yields a complete factory-style replacement at the rear axle, while the sway bar links refresh antiroll connections that often wear with age. Detroit Axle states the parts undergo impact, wear, and fatigue testing and the kit carries a 10-year warranty, which supports long-term durability for everyday and occasional spirited driving. Expect improved ride quality, reduced play at the rear, and more predictable handling compared with worn components. Limitations are typical for aftermarket suspension parts: fitment is vehicle-specific so correct selection and alignment after installation are required, and buyers seeking performance-tuned geometry or adjustable arms should consider aftermarket performance options instead.
Best for: Buyers who want a balanced, reliable factory-style rear suspension replacement to restore ride comfort and handling on a 2010–2018 Subaru Outback without aftermarket tuning.
Less Ideal for: Drivers seeking adjustable or performance-oriented rear suspension components or those installing upgrades on vehicles outside the specified Outback model years.
- Complete rear kit replaces both upper control arms and sway bar links for matched components
- Integrated ball joints simplify installation compared with separate-joint kits
- Described impact, wear, and fatigue testing suggests durability for daily driving
- Includes a 10-year warranty for long-term coverage
- Not adjustable for alignment or performance tuning
Verdict: A ready-to-install rear suspension kit that restores factory-style handling and stability on 2010–2018 Subaru Outbacks with durable, tested replacement parts.
2. Metrix Premium Chassis Parts Left Rear Upper Control Arm with Ball Joint
| Fit Type | Vehicle Specific Fit |
|---|---|
| Auto Part Position | Rear Left Upper |
| Material Type | Steel |
| Included Components | Comes with housing |
| Manufacturer Warranty Description | 3 Year / 36,000 miles Limited Warranty |
This Metrix rear left upper control arm replaces the factory unit and includes a press-in ball joint and housing for a ready-to-install assembly. It is built from steel, arrives pre-greased to reduce initial break-in wear, and uses corrosion-resistant coating intended to extend service life. Typical use is a direct replacement during suspension repairs or when worn upper arms cause clunking, pull, or uneven tire wear; installation follows standard suspension removal, swap, and wheel alignment procedures. Notable features are the vehicle-specific fitment for Subaru Forester (2009–2013) and Outback (2010–2019), greasable design for maintenance, and a three-year/36,000-mile limited warranty. Practical benefits include a precise fit that speeds installation and a durable steel construction that stands up to rough roads. Limitations to consider are that this is a single-side, vehicle-specific part so you must confirm fitment before buying and a steel arm may weigh more than aluminum options preferred by performance-minded buyers seeking reduced unsprung mass.
Best for: Buyers who want a durable, direct-replacement upper control arm that restores factory handling and is easy to install and maintain on a Subaru Outback.
Less Ideal for: Those building a lightweight or track-focused suspension should consider aftermarket aluminum or performance-specific arms designed to reduce unsprung mass and alter geometry.
- Vehicle-specific fit for Subaru Forester and Outback for straightforward installation
- Pre-greased ball joint and greasable design reduce initial wear and simplify maintenance
- Steel construction with corrosion-resistant coating for durability in harsh conditions
- Included housing and integrated ball joint make it a single assembly replacement
- Steel construction is heavier than aluminum performance arms which can increase unsprung weight
Verdict: A tough, ready-to-install rear left upper control arm that restores factory stability and simplifies replacement on compatible Subaru Outback models.
3. TRQ Rear Left Upper Control Arm with Ball Joint for 2010–2019 Subaru Outback
| Fitment | 2010-2019 Subaru Outback rear left upper |
|---|---|
| Material | Alloy Steel |
| Ball Joint Mounting | Machined |
| Greaseable | No |
| Included Components | Control Arm with Ball Joint |
This TRQ rear left upper control arm arrives as a pre-assembled, vehicle-specific replacement that swaps directly for the factory part on 2010–2019 Subaru Outback rear upper positions. It pairs a steel control arm with a pressed ball joint and built-in bushings so installation is straightforward and does not require fabricating or bench-pressing a joint. The arm is not greaseable and is non-adjustable, so it is intended as a like-for-like repair rather than an upgrade for adjustable alignment settings. In practice it restores proper rear suspension geometry, helps eliminate clunks from worn arms, and promotes even tire wear and stable handling compared with a failing original. The machined ball-joint mount and included bushings simplify fitment, and TRQ provides DIY installation videos to aid home mechanics. Limitations are the non-greasable, non-adjustable design and the fact that long-term durability depends on driving conditions; heavy off-road use or repeated exposure to corrosive environments may shorten service life compared with more heavy-duty aftermarket options.
Best for: A practical buyer who wants a straightforward, factory-style replacement to restore rear suspension function on a Subaru Outback without extra modification or alignment complexity.
Less Ideal for: Drivers planning performance suspension upgrades, aggressive off-road use, or who need an adjustable or greaseable control arm should consider more heavy-duty or adjustable aftermarket options instead.
- Pre-assembled direct-fit design for straightforward replacement on 2010–2019 Subaru Outback rear left upper position
- Includes bushings and a machined ball-joint mounting for accurate alignment and easier installation
- Alloy steel construction offers solid baseline strength for typical street driving
- Manufacturer supplies DIY installation videos to guide home mechanics
- Ball joint is not greaseable which limits long-term serviceability compared with greaseable joints
- Non-adjustable design does not allow alignment tuning or aftermarket roll-center changes
Verdict: A no-frills, pre-assembled factory-style replacement that gets a worn rear upper arm back to stock function with minimal fuss.
4. TRQ Rear Upper Control Arm Set (Driver and Passenger)
| Fit Type | Vehicle Specific Fit |
|---|---|
| Auto Part Position | Rear Upper |
| Included Components | Driver and Passenger Rear Upper Control Arms |
| Manufacturer Part Number | PSA53055 |
This TRQ rear upper control arm kit replaces both left and right rear upper arms to restore suspension geometry on compatible Subaru Outback and Baja models. It is a direct-fit, vehicle-specific replacement intended for DIY installers or independent shops replacing worn or damaged rear upper control arms. The set includes both driver and passenger arms and is supplied ready to install with factory-style mounting points so alignment should be straightforward after fitment. TRQ positions this as a premium replacement with supporting DIY videos and a two-year manufacturer warranty, which helps lower the learning curve for first-time installers. On the other hand it is a like-for-like replacement rather than an upgraded performance arm, so it will restore factory handling rather than improve it. Buyers should confirm exact year and submodel fitment before purchase since compatibility is limited to specified Outback and Baja model years.
Best for: Buyers looking for an affordable, factory-style replacement to restore rear suspension geometry on older Subaru Outback or Baja vehicles who prefer a direct-fit part and DIY-friendly installation guidance.
Less Ideal for: Drivers seeking performance suspension upgrades or adjustable control arms should look at purpose-built aftermarket options instead.
- Vehicle-specific direct-fit design for straightforward replacement
- Includes both driver and passenger rear upper arms so both sides are refreshed
- Manufacturer provides DIY installation videos to support home mechanics
- Two-year manufacturer warranty adds post-purchase protection
- Not a performance upgrade—restores factory handling rather than improving it
- Compatibility limited to specific Subaru Outback and Baja model years so fitment must be verified
Verdict: A budget-friendly, direct-fit two-piece rear upper control arm kit that restores factory suspension geometry on the specified Subaru Outback and Baja models.
5. Dorman Rear Driver Side Upper Lateral Arm 527-207
| Auto Part Position | Rear Left Upper |
|---|---|
| Auto Part Orientation | Drivers Side |
| Material Type | Alloy Steel |
| Included Components | 1 Lateral Arm |
This Dorman rear driver-side upper lateral arm is a direct replacement designed to restore proper rear suspension geometry on compatible Subaru vehicles. It is typically used when the factory lateral arm shows wear, causes alignment drift, or creates unusual tire wear or handling issues. The part is precision-engineered from alloy steel and finished in black for corrosion resistance, and Dorman advertises rigorous testing and a design meant to match the original component. For a reliability-first repair, the solid construction and factory-style fit make installation straightforward for a professional or a competent DIY mechanic, and it arrives as a single assembled arm ready to bolt in. Note that fit is sold for select models only so confirming exact vehicle fitment before purchase is essential, and customers replacing multiple suspension components may need to source matching hardware or bushings separately depending on the vehicle and condition of surrounding parts.
Best for: Buyers who prioritize a durable, factory-quality suspension repair and want a straightforward replacement part to restore proper handling and alignment on their Subaru.
Less Ideal for: Customers looking for a performance upgrade, adjustable geometry, or a part that explicitly includes replacement hardware and bushings should consider other options.
- Designed as a direct replacement to replicate factory fit and function
- Made from alloy steel for strength and long service life
- Precision-engineered and tested to reduce alignment and wear issues
- Ships as a single assembled lateral arm for straightforward installation
- Fitment is vehicle-specific so it requires checking the exact model and trim before buying
Verdict: Choose this Dorman lateral arm when you want a strong, factory-style rear upper arm to reliably restore handling and alignment on a Subaru.
6. Detroit Axle Rear Upper Control Arms with Ball Joints for 2010–2018 Subaru Outback, 2‑Pack
| Fit Type | Vehicle Specific Fit |
|---|---|
| Auto Part Position | Rear, Upper |
| Material Type | Alloy Steel |
| Unit Count | 2 Count |
These Detroit Axle rear upper control arms replace the factory rear upper arms on 2010–2018 Subaru Outback models and come as a two-piece kit with ball joints already installed. Installers will use them to restore rear suspension geometry, help reduce uneven tire wear, and eliminate play or clunking from worn arm joints. The arms are made from alloy steel and are finished in black for corrosion resistance, and the included ball joints simplify a swap compared with buying separate components. Detroit Axle reports impact and fatigue testing and backs the parts with a 10-year warranty, which adds confidence for buyers who watch reliability signals. On the downside these are direct replacement-style aftermarket arms rather than a performance or adjustable upgrade, so you should not expect aftermarket alignment adjustability or upgraded articulation for lifted setups. Fitment is vehicle-specific, so matching model years and rear upper position is required for proper installation.
Best for: Buyers who want a direct, factory-style replacement to stop rear suspension play and restore proper handling on a 2010–2018 Subaru Outback, and who value proven reliability and warranty backing.
Less Ideal for: Drivers seeking adjustable or performance upper arms for lifted or motorsport use should look at aftermarket adjustable kits instead.
- Sold as a 2-piece kit with ball joints preinstalled for easier replacement
- Made from alloy steel with protective finish for durability and corrosion resistance
- Vehicle-specific fit for 2010–2018 Subaru Outback rear upper position
- Backed by a 10-year manufacturer warranty which indicates long-term support
- Non-adjustable design so it does not provide alignment correction or enhanced articulation for modified suspensions
Verdict: A straightforward, warranty-backed direct replacement pair that restores rear suspension function on 2010–2018 Subaru Outback models.
7. Detroit Axle Rear Right Upper Control Arm with Ball Joint for Subaru Outback (2010–2018)
| Fit Type | Vehicle Specific Fit |
|---|---|
| Auto Part Position | Rear, Upper |
| Manufacturer Part Number | K623394 |
| Manufacturer Warranty Description | 10-Year |
This Detroit Axle rear right upper control arm is a direct-fit replacement assembled with an integrated ball joint for 2010–2018 Subaru Outback models. It is designed to replace a worn or damaged rear upper arm and restore correct suspension geometry and rear alignment. The arm is cast aluminum and is supplied as a single passenger-side unit ready for installation; Detroit Axle states the part undergoes impact, wear, and fatigue testing and backs the part with a 10-year warranty. For routine repair it simplifies installation compared with rebuilding a used arm because the ball joint is preinstalled and the unit is vehicle-specific. Limitations are that it is sold as one side only and fitment is strictly for the specified Outback model years, so you must confirm side and year before ordering. Also, cast aluminum can save weight but may be less tolerant of repeated heavy impacts than some forged steel options. For conservative buyers who want a factory-style replacement, this arm balances straightforward fitment and long warranty coverage.
Best for: Buyers seeking a reliable, factory-style replacement that minimizes installation hassle and prefers long warranty protection when repairing a Subaru Outback suspension.
Less Ideal for: Drivers looking for heavy-duty aftermarket reinforcement for off-road abuse or those who want a matched pair included in one purchase should consider other options.
- Vehicle-specific fit for 2010–2018 Subaru Outback for a direct replacement install
- Includes preinstalled ball joint to simplify replacement and reduce labor complexity
- Cast aluminum construction reduces unsprung weight compared with heavier steel arms
- Covered by a 10-year manufacturer warranty for long-term peace of mind
- Sold as a single passenger-side unit so you may need to purchase a matching driver-side arm separately
Verdict: A straightforward, vehicle-specific replacement upper control arm with a preinstalled ball joint and a 10-year warranty for risk-averse Subaru Outback owners.
Choosing the Right Subaru Outback Upper Control Arm: Key Factors to Consider
Correct Fitment and Bolt Pattern
Fitment is the single most important factor because the Outback uses specific mounting points and control arm geometry that affect caster and camber. Choosing an arm with exact bolt-hole spacing and bush locations ensures the suspension returns to the intended geometry and reduces the risk of altered steering feel or uneven tire wear.
Incorrect fitment can force compensating adjustments during alignment or require aftermarket adapters. For a practical replacement, look for parts that explicitly list compatibility with your Outback model years and any relevant sub-configuration to avoid surprises at installation.
Bushing Type and Durability
Bushings absorb road shock and control small movements in the suspension. Rubber bushings provide quieter operation and some compliance but wear faster, leading to control arm bushing wear symptoms like clunking and loose steering. Urethane or upgraded bonded bushings last longer and hold alignment better, but they can transmit more road noise and harshness into the cabin.
Consider how you use the vehicle. If you log high mileage or drive on rough roads, prioritize tougher bushing materials that resist deterioration from salt, moisture, and heat. Also check whether the bushings are replaceable separately or bonded into the arm, since serviceability affects long-term ownership cost and repair options.
Ball-Joint Quality and Serviceability
Many upper control arms incorporate a ball joint that connects to the knuckle. Ball-joint play often produces steering wander, vibration, or the control arm symptoms drivers notice when turning. A high-quality, sealed ball joint reduces play and contamination-related failure.
Serviceable designs that allow ball-joint replacement or have grease fittings can extend component life. For Outbacks used in rough conditions, sealed heavy-duty joints or replaceable assemblies are preferable to minimize the chance of premature failure and unscheduled repairs.
Material, Finish, and Corrosion Resistance
Control arms endure road salt, moisture, and gravel impacts. Steel components should have robust coatings, zinc plating, or e-coat finishes to slow corrosion. Some high-end arms use thicker steel or forged components that resist bending and fatigue better than stamped parts.
A durable finish helps maintain fitment tolerances over time and prevents rust from seizing bolts during future control arm replacement. Consider arms with washers, plated hardware, and protective boots on moving interfaces when longevity is a priority.
Alignment Compatibility and Adjustability
Upper control arms affect camber and caster settings. Some replacement arms are direct-fit while others offer built-in adjustability to correct camber or caster without additional shims. If your Outback has aftermarket ride height changes or a history of alignment issues, an arm that allows controlled adjustments can simplify achieving correct alignment.
However, adjustable arms require careful setup to avoid introducing unintended geometry errors. If you prefer a straightforward swap, choose a direct-fit arm that preserves factory geometry and plan for a professional alignment after installation to address any minor deviations.
Installation Complexity and Hardware
Control arm installation ranges from simple to involved depending on whether the arm comes with all necessary hardware and whether special tools are required. Preinstalled bushings and ball joints reduce labor and make control arm replacement more straightforward. Some arms include new bolts, nuts, and alignment sleeves which saves time and reduces the chance of missing components during reassembly.
If you intend to perform the work yourself, check for instructions, torque specs, and whether alignment cam bolts are needed. For shop installations, parts that minimize additional labor typically result in faster turnaround and fewer installation-related issues.
Common Symptoms of a Failing Upper Control Arm
Recognizing early signs can prevent further suspension damage. Typical symptoms include uneven tire wear, loose or wandering steering feel, clunking or knocking noises over bumps, and vibration at certain speeds. These signs often stem from worn bushings or ball-joint play within the upper arm.
Some symptoms overlap with other suspension faults, so using a process of elimination helps. Start with a visual inspection for torn boots, excessive rust, or separations at bushing interfaces, then move to a hands-on check for play by lifting the wheel and manipulating the knuckle.
- Tire feathering or inner-edge wear indicating camber changes
- Clunking when driving over bumps from loose bushings
- Steering wander or loosening feel from ball-joint play
- Vibration during acceleration or at steady speeds if mount points have slack
How Upper Arms Affect Wheel Alignment
Upper control arms determine the upper pivot point of the suspension and therefore influence camber and caster. Even small deviations in arm geometry can change toe-in needs or cause one corner to sit out of specification. After any upper control arm replacement, a professional alignment is recommended to verify camber and caster are within spec for safe handling.
If the replacement arm includes adjustment features, a technician can dial in corrections without shims. For direct-fit arms, expect the alignment shop to use standard adjustment points to bring the Outback back to correct settings.
- Alignment should be checked after installation to prevent premature tire wear
- Adjustable arms can correct pre-existing camber or caster offsets
DIY Replacement Considerations
Many owners can handle an upper control arm replacement with basic mechanical skills and common tools. Typical steps include safely lifting the vehicle, removing the wheel, detaching the ball joint from the knuckle, unbolting the arm from the frame, and reinstalling with correct torque values. Use proper safety stands and consult factory torque specs.
Be prepared for potential stuck bolts due to corrosion. Having replacement hardware, penetrating oil, and a ball-joint separator can save time. After reinstallation, tighten components to spec and get a professional alignment.
- Verify whether the replacement comes with new bolts and nuts
- Inspect and replace related parts like sway bar links if worn
- Grease serviceable joints if applicable during installation
When to Replace Bushings Versus the Whole Arm
If bushings are the only worn component and the metal arm is straight with undamaged mounting points, replacing the bushings can be cost-effective. However, bushing replacement can require press tools or a service shop and may not address ball-joint wear or corrosion in the arm itself.
Full-arm replacement is often preferable when the arm shows rust-through, bent geometry, or the ball joint is integrated and worn. A complete arm replacement also reduces installation time and ensures mating surfaces and hardware are fresh.
- Replace bushings when the arm is structurally sound and only mounts show wear
- Choose full-arm replacement for bent arms, seized components, or integrated ball-joint failure
Corrosion Prevention and Long-Term Care
Salt and moisture accelerate corrosion on suspension components. Regular inspections and cleaning can extend service life. Applying corrosion-resistant coatings or using rust-inhibiting sprays on mounting areas during maintenance helps preserve bolt threads and mating surfaces.
Also inspect rubber boots on ball joints and bushings; replacing torn boots early prevents contaminants from accelerating wear. Addressing minor surface rust before it progresses reduces the risk of needing a full-arm replacement later.
- Inspect arms annually and clean undercarriage after winter driving
- Replace torn boots promptly to keep grease in and dirt out
Still looking for the perfect fit?
Select your Subaru Outback configuration to see the most relevant Control Arms recommendations
How We Chose the Best Subaru Outback Upper Control Arm
We focused on criteria that matter specifically for Subaru Outback upper control arms and prioritized components that restore factory geometry while improving durability. Primary filters included correct fitment to factory mounting points and model years, robust bushing construction to resist the common control arm bushing wear seen on high-mileage Outbacks, and ball-joint quality to reduce play and steering wander. We also evaluated materials and finish for corrosion resistance in wet or salted-road conditions, bracket and bolt compatibility for straightforward control arm installation, and whether the design supports alignment settings without extensive modifications.Excluded items included universal or generic suspension arms that require extensive modification, components intended only for racing without DOT considerations, and units with unclear fitment documentation. Our selection placed extra weight on parts that simplify control arm replacement and minimize alignment corrections while offering long service life for everyday driving.
Our full evaluation process is outlined in our review methodology.
FAQ
What are the most common control arm symptoms on an Outback?
Common symptoms include clunking over bumps, uneven tire wear, wandering steering, and vibration at speed. These often point to worn bushings or ball-joint play in the upper control arm.
Can I replace just the bushings instead of the whole upper control arm?
Sometimes. If the metal arm is straight and corrosion-free, bushing replacement can be a cost-effective repair. But bushing work may require a press or shop tools, and integrated-ball-joint arms often make full replacement more practical.
Will replacing the upper control arm fix alignment issues?
Replacing a worn or bent arm can restore suspension geometry, but an alignment is usually needed afterwards. Some replacement arms include adjustability which can simplify returning camber and caster to specification.
How hard is upper control arm installation for a weekend DIYer?
Installation is doable for someone comfortable with suspension work and basic tools. Expect to lift the vehicle safely, separate the ball joint, and torque bolts to spec. Be ready for possible seized hardware and allow time for a post-install alignment.
Do aftermarket upper control arms need special maintenance?
It depends. Arms with serviceable ball joints or grease fittings benefit from periodic lubrication. Urethane bushings may need inspection for cracking. Follow any maintenance guidance provided with the part to maximize life.
How can I tell if the ball joint in the upper control arm is worn?
Signs of a worn ball joint include looseness when you lift the wheel and move the knuckle, clunking noises when turning, and uneven tire wear. A visual check for torn boots or grease leakage often indicates a compromised joint.
Final Verdict
When replacing an upper control arm on a Subaru Outback, prioritize correct fitment, robust bushing construction, and a quality ball joint to restore safe steering and prevent premature tire wear. Decide between bushing service and full-arm replacement based on the arm's structural condition, corrosion level, and whether the ball joint is integrated. After installation, plan for a professional alignment and periodic inspections to maintain handling and extend component life.
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