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If you drive a Scion xB, worn or damaged control arms can noticeably affect steering feel, ride quality, and tire wear. Choosing the right Scion xB control arm matters because correct fit and durable components restore proper suspension geometry and reduce the risk of uneven tire wear or alignment drift. This guide covers seven shortlisted control arms selected for fitment and long-term durability, and explains the criteria we used to evaluate them, such as material quality, bushing design, and ball-joint robustness. Read on to understand what to look for and how each factor affects real-world driving performance.
Looking for other parts? See all Scion xB parts & accessories.
Top Picks at a Glance
| Best Reviewed A top-rated pick with lots of positive feedback | Detroit Axle Front End 6‑Piece Suspension Kit for 2004–2006 Scion xA/xB |  |
| Most Popular A crowd favorite that many people choose with confidence | TRQ Front Left Lower Control Arm with Ball Joint |  |
| Best Quality Built to a higher standard if you want something more solid | TRQ Front Lower Control Arm and Ball Joint 4-Piece Set |  |
| Best Budget The cheapest option that still gets the job done reliably | PHILTOP Front Lower Control Arm and Suspension Link Kit for Scion xA/xB (2004–2006) |  |
| Most Sold A high-volume bestseller chosen again and again | KAX Front Lower Control Arm Suspension Kit with Ball Joints, Sway Bar Links and Tie Rod Ends |  |
| Best Value for Money The sweet spot between price and what you get | AUQDD Front Lower Control Arm and Ball Joint Assembly, 2‑Piece Kit |  |
| Best Overall The best all-around choice for most situations | TRQ Front Lower Control Arm Set (Driver and Passenger) |  |
1. Detroit Axle Front End 6‑Piece Suspension Kit for 2004–2006 Scion xA/xB
| Fit Type | Vehicle Specific Fit |
|---|---|
| Auto Part Position | Front Outer |
| Auto Part Orientation | Drivers Side |
This Detroit Axle front end 6-piece suspension kit provides the common wear items needed when servicing the front suspension on 2004–2006 Scion xA and xB models. The kit bundles two lower control arms with preinstalled ball joints, two sway bar end links, and two outer tie rod ends so you can replace multiple failing components in one job instead of chasing parts individually. Buyers report the parts are a direct, vehicle-specific fit and arrive ready to install, which speeds a DIY swap or a shop replacement. The manufacturer states testing for impact, wear, and fatigue and the kit carries a long warranty, which aligns with a reliability-focused buyer. Expect the practical benefit of refreshed steering feel and reduced play at each replaced joint. Some customers note small inconsistencies in supplied hardware sizes and occasional missing fittings, so keep basic hand tools and a few spare fasteners handy during installation. Quality feedback is generally positive but not uniform, so an inspection at installation is recommended.
Best for: Reliability-focused owners who prioritize restoring factory steering feel and reducing repeat visits by replacing multiple front suspension wear items at once.
Less Ideal for: Buyers seeking a performance upgrade or heavy-duty suspension components should consider specialty or performance-focused options instead.
- Vehicle-specific kit that replaces multiple front suspension wear items in one purchase
- Lower control arms come with ball joints preinstalled for faster installation
- Parts designed and tested for impact, wear, and fatigue to support durability claims
- Well suited for DIY or shop replacement, reducing downtime by grouping components
- Some customers reported inconsistent hardware sizes and occasional missing small fittings
- Reported cases of premature rubber bushing degradation by a minority of buyers
Verdict A convenient, vehicle-specific repair kit that refreshes front suspension wear items for 2004–2006 Scion xA/xB with generally reliable fitment but inspect supplied hardware during installation.
2. TRQ Front Left Lower Control Arm with Ball Joint
| Fit Type | Vehicle Specific Fit |
|---|---|
| Auto Part Position | Front Left Lower |
| Control Arm Material | Steel |
| Ball Joint Mounting Type | Press In |
This TRQ front left lower control arm replaces the factory unit and arrives with the ball joint and bushings preinstalled to simplify installation. It is used as a direct-fit replacement for the front driver lower position on compatible Scion xA, xB and Toyota MR2 Spyder model years listed, so it bolts in without modification for routine suspension repairs. Notable features include a steel construction, press-in ball joint mounting, and preinstalled bushings that save time during a DIY swap or shop repair. The practical benefits are straightforward: reduced downtime, fewer parts to press in, and a unit meant to restore steering stability and eliminate clunks from a failed arm. Limitations to consider are that the ball joint is non-greasable and the unit is a press-in type, so long-term serviceability depends on replacing the whole arm rather than servicing the joint; warranty covers parts only. Fitment verification before purchase is important to ensure it matches the exact vehicle production date and side required.
Best for: Buyers who prioritize convenience and a quick, low-hassle repair will appreciate this ready-to-install control arm for routine suspension replacements and DIY jobs.
Less Ideal for: Drivers planning long-term rebuilds or who prefer serviceable, greasable suspension components should consider alternatives that allow joint servicing or remanufacturing.
- Preassembled with ball joint and bushings to speed installation
- Steel construction intended to match factory replacement strength
- Vehicle-specific fit reduces the need for modifications or adjustments
- Includes common reference numbers for easy cross-checking of compatibility
- Ball joint is press-in and not greasable, so the entire arm must be replaced when the joint wears
- Manufacturer warranty covers parts only and not labor
Verdict A convenient, preassembled direct-fit control arm that saves installation time but requires full-arm replacement when the ball joint fails.
3. TRQ Front Lower Control Arm and Ball Joint 4-Piece Set
| Included Components | 2 Front Lower Ball Joints, 2 Front Lower Control Arms |
|---|---|
| Auto Part Position | Front Lower |
| Fit Type | Vehicle Specific Fit |
| Item Type Name | Control Arm with Ball Joint Set |
This TRQ kit supplies two front lower control arms and two matching ball joints intended as direct replacements for the Scion xB and other listed Toyota/Scion models. It is typically used when worn bushings or failing ball joints cause noise, looseness, or poor steering response; the preassembled control arms simplify installation compared with rebuilding original arms. Notable points include vehicle-specific fitment, included ball joints, and TRQ’s installation videos to guide DIY or professional installs. In real-world use the kit restores steering precision and reduces suspension noise and vibration when fitted and aligned properly. Some buyers report excellent fit and a factory-like ride, while a minority have had issues with incorrect fitment or premature ball-joint wear, so confirming fitment before installation is important. Expect a job that may require two people and an alignment afterward; replacing control-arm fasteners and using proper tools will help ensure a durable result.
Best for: Performance-oriented buyers who prioritize restoring tight steering and confident handling on their Scion xB and prefer a direct-fit replacement that lets them control parts quality and installation.
Less Ideal for: Those who want a lifetime-guaranteed or heavily greasable aftermarket performance upgrade should consider premium-brand performance arms or rebuildable options instead.
- Direct-fit design meant to replace factory front lower control arms without modification
- Includes matched ball joints so the suspension is rebuilt as a complete assembly
- Preassembled components and manufacturer DIY videos reduce installation guesswork
- Widely compatible reference numbers make confirming fitment easier for specific vehicles
- Some buyers reported occasional fitment errors or ball-joint durability issues in heavy-use conditions
- Installation can be time consuming and may require special tools and an assistant for safe removal and reinstallation
Verdict A practical, direct-fit control arm and ball-joint kit that restores steering feel and ride quality on the Scion xB, but verify fitment and be prepared for a hands-on install.
4. PHILTOP Front Lower Control Arm and Suspension Link Kit for Scion xA/xB (2004–2006)
| Fit Type | Vehicle Specific Fit |
|---|---|
| Auto Part Position | Front Lower |
| Included Components | Control Arm |
| Material Type | Alloy Steel |
This PHILTOP kit bundles two front lower control arms with ball joints plus two outer tie rod ends and two sway bar end links to restore basic front-end suspension components on 2004–2006 Scion xA/xB vehicles. Designed as a vehicle-specific fit, the parts are stamped alloy-steel replacements intended for DIY or shop installation; the control arms include preinstalled ball joints and the end links have grease fittings for periodic lubrication. In practice this kit addresses common symptoms like excessive play, clunking, or uneven tire wear and lets you rebuild the front suspension without buying individual components separately. Several reviewers report good fit and durability for the price, though there are isolated quality-control complaints such as stripped threads or premature rubber failure on some batches. Expect a lower-cost alternative to factory replacements that can perform well when inspected before installation, but be prepared to swap defective pieces or re-grease joints during routine maintenance.
Best for: Budget-conscious owners who want an affordable, all-in-one front suspension repair kit for a Scion xA/xB and prefer to replace multiple worn parts at once rather than sourcing individual components.
Less Ideal for: Drivers seeking guaranteed factory-quality longevity or a premium OEM-branded rebuild should consider higher-end alternatives or individual factory replacement parts.
- Complete front kit includes control arms, outer tie rod ends, and sway bar end links for a one-purchase repair
- Vehicle-specific fit for 2004–2006 Scion xA and xB, which simplifies installation
- Alloy steel construction offers robust-looking replacement parts compared with thin stamped alternatives
- End links feature grease fittings for periodic re-lubrication to extend service life
- Some customers reported inconsistent quality control including stripped threads or early rubber failure
- Not a direct factory-quality branded replacement so longevity may vary by unit
Verdict A cost-effective, vehicle-specific front suspension kit for 2004–2006 Scion xA/xB that offers good value but has occasional quality-control variability.
5. KAX Front Lower Control Arm Suspension Kit with Ball Joints, Sway Bar Links and Tie Rod Ends
| Fit Type | Vehicle Specific Fit |
|---|---|
| Auto Part Position | Front Lower |
| Included Components | Control Arms, Sway Bar End Link, Tie Rod End |
| Material Type | Alloy Steel |
This KAX kit supplies both front lower control arms pre-assembled with ball joints plus matching sway bar end links and outer tie rod ends so you can refresh the entire front lower suspension on a Scion xB in one job. It is designed as a vehicle-specific fit for 2004–2006 Scion xA and xB models and the parts come pre-oiled and electrocoated to resist rust. Typical use is a direct replacement during a suspension refresh or to restore steering feel and eliminate clunks from worn bushings and ball joints. The plug-and-play design aims to fit without drilling or modification, which speeds installation for home mechanics or shops. Practical benefits include bundled components that reduce parts hunting and pre-assembled ball joints that cut assembly time. Limits to expect are fitment sensitivity — a few buyers report minor dimensional mismatches — and construction that feels a little below factory finish in places, so careful test-fit and alignment are recommended after installation.
Best for: A risk-averse mainstream buyer looking for a straightforward, bundled replacement to restore front suspension on a Scion xB with minimal parts searching and installation complexity.
Less Ideal for: Drivers seeking premium factory-quality components or those who need guaranteed exact factory tolerances should consider higher-end OEM-style replacements or professional remanufactured parts.
- Complete kit covers front lower suspension with control arms, sway bar end links, and outer tie rod ends so you get matched components in one purchase.
- Pre-assembled ball joints and pre-oiling reduce installation steps and initial break-in noise.
- Protective electrocoat and alloy steel construction help resist corrosion for longer service life.
- Vehicle-specific fit intent simplifies replacement on compatible Scion xA/xB models.
- Some users reported small fitment differences requiring adjustments or causing installation delays.
- Build quality is utilitarian in places compared with factory parts, so longevity may vary by driving conditions.
Verdict A convenient, vehicle-specific front suspension kit for Scion xB owners who want a one-stop replacement, but double-check fitment and expect workshop alignment after install.
6. AUQDD Front Lower Control Arm and Ball Joint Assembly, 2‑Piece Kit
| Fit Type | Universal Fit |
|---|---|
| Auto Part Position | Front |
| Material Type | Alloy Steel |
| Manufacturer Part Number | 641288-89 |
This AUQDD kit replaces both front lower control arms and includes ball joints to restore steering stability and suspension geometry on the Scion xB. It is typically used as a factory-quality replacement when worn control arms cause looseness, uneven tire wear, or vague steering. The kit’s alloy steel construction and preassembled ball joints make installation straightforward for a DIY mechanic or a local shop, and several customers report accurate fit and noticeable tightening of the front end after swap. Because the parts are sold as a paired kit they save time sourcing matching components and reduce alignment hassle after installation. Limitations to expect are typical of budget aftermarket parts: finish and long-term corrosion resistance may not match dealer parts, and one-off fitment issues have been reported on non-matching vehicles, so confirm compatibility with your xB model year and suspension variant before ordering. For owners who need a solid, lower-cost replacement that restores handling, this kit delivers practical value.
Best for: Practical optimizers who prioritize getting reliable, cost-effective factory-quality replacements that restore handling without paying dealer prices.
Less Ideal for: Those seeking premium corrosion-resistant finishes or guaranteed lifetime durability should consider higher-end aftermarket or dealer parts instead.
- Sold as a matched left-and-right kit to simplify replacement and ensure symmetrical front geometry.
- Includes ball joints preinstalled for faster installation and reduced parts sourcing.
- Alloy steel construction for strength comparable to factory replacements at a lower cost.
- Multiple reviewers report accurate fit and improved steering feel after installation.
- Finish and corrosion protection may be less durable than higher-end or dealer parts.
- Universal-fit labeling means you must verify exact year and variant fitment for the Scion xB before purchase.
Verdict A budget-friendly, matched front control arm kit that restores steering and suspension feel on Scion xB models while keeping costs low.
7. TRQ Front Lower Control Arm Set (Driver and Passenger)
| Fit Type | Vehicle Specific Fit |
|---|---|
| Auto Part Position | Front Lower |
| Included Components | 1 Driver and 1 Passenger Lower Control Arm |
| Manufacturer Warranty Description | 2 years |
This TRQ front lower control arm set replaces both driver and passenger lower control arms as direct-fit replacements for Scion xB and other listed Toyota-based models. Each arm arrives pre-assembled with bushings and ball joint locations sized to match factory mounting points, which simplifies DIY installation and reduces shop time. In everyday use the parts tighten up worn front-end feel, improve steering response, and make post-replacement alignments straightforward. Notable features include vehicle-specific fitment, included driver and passenger arms, and TRQ’s library of installation videos to guide home mechanics. Practical benefits are immediate: smoother ride quality, reduced play in the front end, and the convenience of replacing both sides at once. Limitations to consider are mixed long-term durability reports from some users and occasional minor hardware fit notes that may require reusing original fasteners during installation. For buyers who want a cost-effective, easy-to-install replacement that performs like the factory part, this set is a sensible choice.
Best for: Practical, balanced buyers who want a reliable, cost-conscious factory-style replacement that is easy to install and restores handling without overspending.
Less Ideal for: Drivers seeking heavy-duty or performance-upgraded suspension components for aggressive driving or off-road use should consider reinforced aftermarket arms instead.
- Direct-fit replacement for front lower control arms to simplify installation and alignment.
- Includes both driver and passenger arms so both sides can be renewed at once.
- Pre-assembled components reduce labor and the need to press in bushings or ball joints.
- Extensive installation videos and documentation to support DIY repairs.
- Some reviewers report variable long-term durability compared with heavier factory parts.
- Occasional fitment quirks with supplied hardware may require using original nuts or bolts.
Verdict A practical, easy-to-install front lower control arm set that restores suspension tightness and handling for a balanced, budget-conscious buyer.
Choosing the Right Scion xB Control Arm: Key Factors to Consider
Fitment and Mounting Geometry
Fitment is critical because the control arm must match the Scion xB’s factory mounting points to preserve suspension geometry and alignment. A control arm that deviates in length or bushing placement can alter camber and toe, which leads to uneven tire wear and poor steering response.
Confirming correct mounting geometry reduces the need for corrective modifications and simplifies installation. Accurate fitment also helps maintain factory ride height and ensures the arm interfaces properly with sway bar links, subframe mounts, and steering components.
Bushing Material and Design
Bushings isolate road noise and vibration while allowing controlled movement of the suspension. Softer rubber bushings absorb more vibration but may wear faster and allow more deflection under load. Stiffer polyurethane or bonded designs reduce compliance and improve steering precision, but can transmit more noise and feel harsher.
Consider the typical driving conditions and whether comfort or sharper handling is the priority. Also check whether bushings are serviceable or replaceable, since that affects long-term maintenance and ownership cost.
Ball-Joint Construction and Serviceability
Where a control arm includes a ball joint, its construction determines steering responsiveness and longevity. A sealed, high-quality ball joint resists contamination and lasts longer, while a serviceable or replaceable ball joint can simplify future repairs without replacing the entire arm.
Inspect the claimed load ratings, dust-seal design, and whether the joint is greasable. These details influence how the part behaves under daily driving, potholes, or occasional spirited use, and they affect maintenance intervals.
Material, Strength, and Corrosion Protection
Control arms are commonly made from stamped steel, cast iron, or forged aluminum. Material affects strength, weight, and durability. Steel arms are durable and cost-effective but require robust corrosion protection. Aluminum offers weight savings but must be designed to handle local loads without fatigue.
Surface treatments and coatings protect against rust in wet or salty climates. Buyers should consider whether the product’s finish and material choice match expected environmental exposure and longevity needs.
Compatibility With Alignment and Suspension Setup
A replacement control arm should support proper wheel alignment and maintain intended suspension kinematics. Small variations in pivot points or ball-joint height can change camber and caster settings, which in turn affect handling and tire wear.
For vehicles that will be aligned after installation, confirm the arm does not prevent standard alignment adjustments. If adjustable arms are under consideration, understand how adjustment mechanisms affect reliability and range of correction.
Installation Ease and Included Hardware
Installation complexity affects time and potential for user error. Control arms that come with quality bushings preinstalled, correct bolts, nuts, and clear instructions reduce installation time and avoid trips to hardware stores. Some designs require press tools or a shop to swap bushings or ball joints, while others are bolt-in replacements.
Consider whether you will install the part yourself or have a shop handle the job. Hardware fit, included fasteners, and the need for special tools all influence total installation effort and cost.
FAQ
How can I tell if a Scion xB control arm is worn?
Common signs include clunking or knocking noises over bumps, uneven tire wear, wandering steering, and increased vibration. You may also notice looseness when turning or when pushing down on the corner of the vehicle. Visual inspection can reveal torn bushings, excessive play at the ball joint, or rusted mounting points.
Can I replace just the bushings instead of the whole control arm?
In many cases bushings can be replaced separately, which can be cost effective if the arm itself is in good condition. However, some arms are pressed together or require special tools, so replacing bushings may be more labor intensive. Choose the option that balances part condition, labor time, and expected remaining life.
Will installing a new control arm fix alignment issues?
A properly fitted control arm restores correct pivot points and often resolves alignment drift caused by worn components. However, an alignment is usually required after installation to verify and correct camber, toe, and caster. If other suspension components are worn, they can also affect alignment and should be inspected.
How long do replacement control arms typically last?
Longevity depends on material, bushing type, driving conditions, and maintenance. Under normal driving, a well-made control arm often lasts many years, while exposure to road salt, rough roads, or heavy loads can accelerate wear. Choosing durable materials and corrosion protection extends service life.
Is it necessary to grease the ball joint on replacement control arms?
If the ball joint is serviceable and has a grease fitting, periodic greasing helps displace contaminants and extend life. Many modern replacement arms use sealed ball joints that do not require greasing. Check the part’s specification to determine whether greasing is recommended.
Are adjustable control arms a good choice for the Scion xB?
Adjustable arms allow precise alignment correction and can be useful for vehicles with modified suspension or altered ride height. For a stock or lightly used vehicle, a direct-fit arm that preserves factory geometry is often preferable due to simplicity and proven reliability. Consider adjustability only if you need alignment range beyond factory settings.
How We Chose the Best Scion xB Control Arm
To build this list we focused on the attributes that matter most for Scion xB control arms in everyday driving and light performance use. Key evaluation criteria included fitment accuracy to factory mounting points, bushing material and design for NVH and durability, ball-joint construction and serviceability, overall material and finish for corrosion resistance, and ease of installation including included hardware and instructions. We also considered service life expectations under mixed urban and highway conditions and how each design supports alignment stability. Exclusions included any units that did not match factory mounting geometry, components lacking replaceable bushings or serviceable ball joints when applicable, and parts with unclear material specifications. Our aim was to shortlist control arms that balance correct fit, long-term durability, and predictable handling for Scion xB owners.
Our full evaluation process is outlined in our review methodology.
Conclusion
When choosing a Scion xB control arm, prioritize correct fitment, durable bushing design, and reliable ball-joint construction. These factors determine how well the replacement restores steering feel, prevents uneven tire wear, and holds alignment over time. Balance comfort and handling needs when selecting bushing materials, and consider whether serviceable components or included hardware will reduce long-term maintenance. After installation, have the suspension aligned to ensure the new arm achieves the intended performance and longevity.
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