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If you drive a Toyota 4Runner, the condition of the leaf springs affects towing, ride height, and on-road stability. Replacing worn or damaged springs can reduce sag, restore proper alignment, and improve how the vehicle handles heavy loads. This guide highlights seven shortlisted leaf spring options selected for their suitability for the 4Runner. We evaluated candidates across load capacity, ride comfort, build materials, and durability to help you choose the right fit. Read on for practical guidance before you pick a replacement.
Looking for other parts? See all Toyota 4Runner parts & accessories.
Top Picks at a Glance
| Best Overall The best all-around choice for most situations | Dorman 929-114 Rear Passenger Side Leaf Spring for Select Toyota Models |  |
| Best Quality Built to a higher standard if you want something more solid | Old Man Emu CS009R 2 in. Lift Leaf Spring (single) |  |
| Best Value The sweet spot between price and what you get | Dorman 929-403 Rear Passenger Side Leaf Spring for Toyota Tundra (select years) |  |
| Best Budget The cheapest option that still gets the job done reliably | Zone Offroad ZONJ0308 3" Lift Rear Leaf Spring (sold individually) |  |
| Highest Rated A top-rated pick with lots of positive feedback | Dorman 929-401 Replacement Leaf Spring for Select Toyota Models |  |
| Most Popular A crowd favorite that many people choose with confidence | Dorman 929-400 Leaf Spring (replacement) |  |
| Best Seller A high-volume bestseller chosen again and again | Dorman Rear Driver Side Leaf Spring (90-173) for Toyota models |  |
1. Dorman 929-114 Rear Passenger Side Leaf Spring for Select Toyota Models
| Manufacturer | Dorman Products |
|---|---|
| Model | 929-114 |
| Manufacturer Part Number | 929-114 |
| OEM Part Number | 48210-04550; 48210-04551; 48210-35A40; 4821004650 |
This Dorman leaf spring is a direct replacement designed to restore rear suspension support and ride height on compatible Toyota models. It installs in place of the original spring and is intended for use when the factory spring is cracked, corroded, or has permanently sagged from age or overload. The part is painted and built to aftermarket specifications to provide reliable service life and consistent load-bearing behavior. Buyers will appreciate that it is matched to factory mounting points so fitment is straightforward when the correct vehicle fit is selected, and it carries multiple OEM part number matches for verification. Real-world notes: some users report small differences in ride height compared with factory springs, so alignment and pairing with the opposite-side spring matter, and professional installation is recommended to ensure correct spring alignment and spring eye hardware torque. This is a practical replacement for restoring suspension function but not a heavy-duty upgrade for higher payload or off-road lift purposes.
Best for: Balanced buyers who want a reliable, factory-style replacement to restore ride quality and suspension support on their Toyota without pursuing aftermarket lift or heavy-load upgrades.
Less Ideal for: Drivers seeking heavy-duty load upgrades, lift kits, or performance off-road springs should choose purpose-built or reinforced replacements instead of this direct-replacement unit.
- Direct-replacement design matches factory mounting points for straightforward fitment on specified Toyota models
- Painted finish for corrosion resistance compared with bare springs
- Manufactured to aftermarket specifications for consistent load-bearing and long service life
- May sit slightly lower than original factory spring height on some vehicles requiring matched pair replacement or shimming
- Not marketed as a heavy-duty or lift spring option for increased payload or off-road use
Verdict: A practical, factory-style rear leaf spring replacement that restores suspension support and fitment for compatible Toyota models.
2. Old Man Emu CS009R 2 in. Lift Leaf Spring (single)
| Brand | Old Man Emu |
|---|---|
| Manufacturer | Old Man Emu by ARB |
| Item model number | CS009R |
| Lift | 2 in. |
This Old Man Emu CS009R leaf spring is a factory-quality replacement spring engineered to provide a 2 inch rear lift while restoring suspension geometry on a Toyota 4Runner. Installed as a single leaf spring, it is typically used to correct rear sag, increase ground clearance, or support heavier loads and towing setups. The spring’s construction is aimed at a stiffer, performance-oriented feel that resists compression under load and holds vehicle stance. In real-world driving it will firm up the rear and help maintain rake when carrying gear or a small trailer, but several user reports note a notably stiff ride on highway and uneven pavement. Fitment and durability align with factory-replacement expectations, though drivers seeking a softer, comfort-focused ride may find the harsher response unacceptable. Expect improved load control and stance at the cost of a firmer ride quality and reduced compliance over bumps.
Best for: Performance-oriented buyers who prioritize load control, rear stance correction, and increased ground clearance for a 4Runner and accept a firmer ride to achieve those goals.
Less Ideal for: Drivers who prioritize a plush daily driving ride or who need a comfort-focused suspension setup should consider softer alternatives instead.
- Factory-quality replacement designed to restore rear stance and provide a 2 inch lift
- Stiffer spring rate improves load carrying and towing stability
- Built by a reputable off-road suspension brand with vehicle-focused design
- Notably firm highway and everyday-road ride; reduces suspension compliance
- Sold as a single leaf spring so matching pairs must be purchased separately if needed
Verdict: A durable, performance-focused 2 inch lift leaf spring that restores rear stance and improves load control for the Toyota 4Runner.
3. Dorman 929-403 Rear Passenger Side Leaf Spring for Toyota Tundra (select years)
| Manufacturer | Dorman Products |
|---|---|
| Model | 929-403 |
| Manufacturer Part Number | 929-403 |
| OEM Part Number | 482100C040 |
| Exterior | Ready To Paint If Needed |
This Dorman rear passenger-side leaf spring is built as a direct replacement for specified Toyota applications and is intended to restore suspension support and ride height after wear, collision, or corrosion. Installers use it to replace a damaged or fatigued spring during a rear suspension repair or axle re-assembly; the part is designed to match factory mounting points so it fits without major modification when the correct application is selected. Notable features include corrosion-resistant finish options and manufacturing to OEM-compatible fit and function, which help it deliver predictable load carrying and ride characteristics for light-duty truck use. The practical benefit is a budget-friendly way to return a vehicle to safe, usable suspension performance while avoiding dealer-level pricing. Important limitations are that fitment depends on selecting the exact vehicle trim and year and that this is a single-side leaf spring so replacing both sides for balanced performance is recommended.
Best for: Practical optimizers who prioritize restoring safe, functional suspension on a budget and prefer parts that offer factory-like fit without dealer markup.
Less Ideal for: Drivers seeking a performance upgrade, load-leveling solution, or a complete axle-side refresh should consider matched-pair or upgraded springs and related suspension components instead.
- Direct-replacement design intended to match factory mounting points for easier installation
- Engineered for corrosion resistance and fatigue-tested for longer service life
- Manufactured by a large aftermarket supplier with broad vehicle coverage
- Sold as a single-side spring rather than a matched pair
- Fit requires confirming exact vehicle trim and year before purchase
Verdict: A cost-conscious, factory-fit replacement leaf spring for restoring rear suspension support on compatible Toyota models.
4. Zone Offroad ZONJ0308 3" Lift Rear Leaf Spring (sold individually)
| Model | ZONJ0308 |
|---|---|
| Manufacturer | Zone Offroad |
| Lift | 3" of lift |
| Pack | 5-leaf |
This Zone Offroad replacement leaf spring is a budget-oriented rear spring designed to add about 3 inches of lift while preserving compression travel. It is a five-leaf pack with anti-friction pads and spacer plates between leaves to reduce internal friction and improve articulation, sold individually with bushings supplied separately. Installation is typical for rear leaf springs and will be most practical for owners who want a simple lift without extensive suspension overhaul. The machined exterior and heavier pack help restore load-carrying feel compared with worn factory springs, but buyers should expect basic materials and finish compared with higher-end or performance-focused options. Because it is sold one spring at a time and does not include bushings, plan for extra parts and labor. Customer feedback is mixed, so confirm fitment and inspect components during install to ensure the expected ride and clearance gains.
Best for: Budget-conscious Scion xB owners who want a straightforward rear lift and improved wheel travel without paying for premium branded springs.
Less Ideal for: Drivers seeking a fully matched set, factory-quality finish, or who prefer a complete kit with included bushings and hardware should consider higher-end replacements or complete suspension kits.
- Provides a 3 inch rear lift to increase ground clearance and accommodate larger tires
- Five-leaf pack with anti-friction pads and spacer plates improves wheel travel and reduces internal binding
- Sold individually so you can replace only the worn side rather than buying a full set
- Bushings are not included so additional purchases or reuse of old bushings are required
- Finish and materials are basic compared with premium or performance aftermarket springs
Verdict: A low-cost 5-leaf rear spring that delivers a 3 inch lift and better wheel travel for Scion xB owners on a tight budget.
5. Dorman 929-401 Replacement Leaf Spring for Select Toyota Models
| Brand | Dorman |
|---|---|
| Model | 929-401 |
| Manufacturer Part Number | 929-401 |
| OEM Part Number | 48210-04140; 48220-04050; 48220-04060; 48220-04070; 48220-04080; 48220-04090; 48220-04130 |
This Dorman leaf spring is a direct-replacement part intended to restore the rear suspension ride height and load support on compatible Toyota applications. It installs where a worn or damaged driver or passenger side leaf was removed and is used to recover sagging suspension, correct axle alignment, or replace collision-damaged components. The listing emphasizes factory-compatible fit and durable construction and the part arrives ready to paint if desired. Buyers note straightforward installation when the correct fitment is selected, and the spring can improve ride and support compared with heavily worn originals. Limitations reported by users include occasional fitment confusion between 2WD and 4WD variants, squeaks if not lubricated or properly installed, and mixed longevity versus OEM on heavily loaded or off-road vehicles. Also this listing appears to sell single springs and may not include mounting hardware, so plan for additional parts and careful vehicle-specific fit checks before purchase.
Best for: Reliability-focused owners looking to replace a worn rear leaf spring with a factory-style aftermarket part to restore ride height and everyday load-carrying confidence on older Toyota trucks.
Less Ideal for: Drivers who frequently tow heavy loads, do serious off-road use, or want a full suspension upgrade should consider heavy-duty or performance-oriented spring options instead.
- Direct-replacement design intended to match factory fit and restore suspension geometry
- Manufactured to aftermarket standards for reliable day-to-day load support
- Arrives ready to paint for corrosion protection or visual matching
- Generally straightforward to install when correct vehicle configuration is selected
- Sold as a single spring and may not include bolts, shackles, or bushings
- Some users report premature failure under heavy loads or off-road use
- Fitment differences between 2WD and 4WD models can cause installation issues
Verdict: A factory-style replacement leaf spring aimed at restoring rear ride height and reliable everyday load support on compatible Toyota trucks.
6. Dorman 929-400 Leaf Spring (replacement)
| Brand | Dorman |
|---|---|
| Model | 929-400 |
| Manufacturer Part Number | 929-400 |
| OEM Part Number | 48210-04051; 48210-04052; 48210-04053; 48210-04080; 48210-04081; 48220-04020; 48220-04021; 48220-04022; 48220-04030; 48220-04031 |
This Dorman 929-400 leaf spring is a factory-replacement style suspension leaf meant to restore weight support and ride control when an original spring is worn or damaged. It is used as a straightforward swap-in part to replace a failed leaf spring, returning sagging rear ride height and improving handling under load. The unit is painted for corrosion resistance and built to Dorman specifications intended to match original fit and function for listed applications. Practical benefits include simpler installation compared with custom spring packs and predictable load-carrying behavior once installed. Limitations are that fitment must be confirmed for your Scion xB trim and year before purchase and the part is a single spring so replacing one side may still leave slightly uneven wear if the opposite spring is aged. This is a solid, no-frills replacement for owners who need a reliable restored ride rather than upgraded performance.
Best for: Reliability-focused owners who prioritize restoring factory ride and load capacity with a straightforward replacement part rather than performance upgrades.
Less Ideal for: Buyers seeking increased load capacity, ride height lift, or performance-tuned suspension should consider upgraded or custom leaf packs instead.
- Factory-replacement design intended to match original fit and function
- Painted finish for basic corrosion protection
- Built to aftermarket supplier specifications for dependable load support
- Requires verification of exact Scion xB fitment before purchase
Verdict: A dependable, factory-style replacement leaf spring for restoring original ride and load support.
7. Dorman Rear Driver Side Leaf Spring (90-173) for Toyota models
| Model | Dorman 90-173 |
|---|---|
| Manufacturer | Dorman Products |
| Exterior | Ready To Paint If Needed |
| OEM Part Number | 48220-04030; 48220-04031 |
This Dorman 90-173 rear driver side leaf spring is a factory-replacement style part intended to restore the suspension function and payload support of a damaged or worn leaf pack. It installs in place of the original leaf spring and is used when springs show cracking, corrosion, sag, or after overload damage. Notable features include a ready-to-paint exterior and manufacturing to aftermarket specifications from a long-established parts supplier, which aims to match fit and function with the original component. In practice this means a straightforward swap for the correct-fit vehicle that should recover ride height, reduce sag, and return intended load handling when fitted with proper hardware. Limitations are typical of replacement leaf springs: installation requires basic suspension disassembly and alignment of shackles and U-bolts, and performance will depend on correct fitment to the specified Toyota model and year. This is a practical option for restoring factory ride characteristics without performance tuning or suspension modification.
Best for: Risk-averse buyers looking to restore factory ride and load handling on a Toyota 4Runner with a dependable, like-for-like replacement part.
Less Ideal for: Drivers seeking lifted, heavy-load or performance-tuned suspension upgrades should consider purpose-built aftermarket springs or upgrades instead.
- Direct-replacement design intended to match original fit and function
- Durable aftermarket construction for reliable load support
- Ready-to-paint exterior for corrosion protection or cosmetic matching
- Made and supported by a well-known aftermarket parts supplier
- Requires suspension disassembly and proper installation hardware for safe fitment
- Not a performance or heavy-duty upgraded spring option
Verdict: A dependable, factory-style replacement leaf spring to restore suspension support and ride characteristics on compatible Toyota vehicles.
Choosing the Right Toyota 4Runner Leaf Spring: Key Factors to Consider
Load Capacity And Spring Rate
Load capacity determines how much weight the spring can support before excessive sag occurs. A correct rated capacity helps maintain ride height under towing or cargo, which preserves suspension geometry and handling.
Spring rate affects how firm or soft the ride feels as load changes. Stiffer rates increase load-carrying ability but can transmit more vibration to the cabin, while softer rates improve comfort at the cost of sag under heavy loads. Choose a balance that matches how you use the 4Runner.
Material And Corrosion Resistance
The alloy and heat treatment used in the leaf spring affect fatigue life and resistance to cracking. Higher-grade steels and proper tempering reduce the risk of permanent set and failure over time.
Coatings, galvanizing, or powder finishes help prevent rust in wet or salty environments. Corrosion can accelerate wear and weaken leaves and eyes, so durable surface protection extends service life and maintains safe performance.
Fitment And Mounting Compatibility
Correct fitment to the 4Runner's hangers, shackles, and axle plates avoids installation headaches and maintains intended geometry. Misaligned springs can cause uneven tire wear and handling issues.
Look for springs designed to match factory eye-to-eye length, arch profile, and center-pin location to minimize additional modifications. Compatibility with existing shackles and U-bolts reduces installation time and cost.
Ride Comfort And Noise Characteristics
Leaf spring design influences cabin comfort and road noise. Multi-leaf packs with more leaves or progressive tapering can be tuned to absorb impacts while still supporting load.
Rubber or polyurethane interleaf materials and good pad design reduce squeak and metal-on-metal contact. Consider how much comfort you need versus load support when selecting a pack stiffness.
Durability And Maintenance Needs
Durability includes resistance to fatigue, cracking, and corrosion under repeated loading cycles. Springs with solid construction and quality eye bushings last longer with less maintenance.
Check whether replacement parts such as bushings, shackles, or pads are commonly available and whether the design allows straightforward service. Lower-maintenance options reduce long-term ownership effort.
Installation And Required Hardware
Some leaf springs include new center pins, bushings, and U-bolts while others assume reuse of existing hardware. Having proper hardware simplifies installation and ensures safe clamping to the axle.
Consider whether installation requires frame modification, hanger relocation, or shackle changes. If you plan to perform installation yourself, choose options with clear instructions and standard fasteners to avoid specialized tools.
How We Chose the Best Toyota 4Runner Leaf Spring
We focused on leaf springs that fit the Toyota 4Runner chassis and perform well under typical use cases such as towing, off-road loads, and daily driving. Selection prioritized materials and construction quality that affect fatigue life and resistance to corrosion, including alloy type and protective coatings. We evaluated rated load capacity and spring rate to ensure candidates can restore ride height and manage towing or cargo without excessive sag. Fitment and mounting points were considered so the springs align with factory shackles and hangers, reducing need for additional modifications. Ride comfort and NVH implications from different spring rates were weighed to balance load support and on-road manners. Excluded from the list were springs designed exclusively for other vehicle platforms, custom-fabricated one-off assemblies, and options that lacked clear load ratings or spec sheets. We also set aside products with inconsistent build-quality information or inadequate mounting hardware documentation.
Our full evaluation process is outlined in our review methodology.
FAQ
How do I know if my Toyota 4Runner leaf spring is broken or failing?
Common signs include visible cracks or broken leaves, sagging rear ride height, uneven tire wear, and a change in handling or increased bounce. You may also notice unusual noises such as clunks or squeaks from the rear suspension. If you observe these symptoms, inspect the springs and mounting hardware and consider a professional assessment.
Can I replace just one leaf spring or should I replace both sides?
It is usually best to replace springs in axle pairs to ensure even ride height and balanced handling. Installing a new spring on only one side can create uneven suspension geometry and accelerated wear. Replacing both sides helps maintain symmetry and predictable behavior.
What is involved in installing replacement leaf springs on a 4Runner?
Installation typically involves supporting the axle, removing U-bolts, detaching the spring from hangers and shackles, and swapping the pack before reattaching hardware. New bushings and center pins are often recommended. Depending on the spring and condition of mounting points, alignment or torque checks may be necessary after installation.
Do upgraded or heavy duty leaf springs affect ride comfort?
Heavier duty springs increase load-carrying capacity but often have a firmer ride when unloaded. The tradeoff is less sag under load at the cost of some additional road harshness. Choosing progressive or tuned packs can mitigate this tradeoff to preserve comfort while improving support.
How long do leaf springs typically last, and what affects their lifespan?
Service life varies widely depending on driving conditions, load frequency, and environmental exposure. Springs used for towing or off-road work tend to wear faster. Corrosion, repeated overloading, and poor maintenance shorten lifespan, while quality materials and protective coatings extend it.
Conclusion
When selecting a Toyota 4Runner leaf spring, prioritize load capacity and correct fitment to preserve ride height and suspension geometry. Consider material quality and corrosion protection to maximize fatigue life, and weigh the tradeoff between firmer, load-focused packs and everyday ride comfort. Plan for proper hardware and installation, and replace springs in pairs when possible to maintain balance. Focusing on these criteria will help you choose a solution that meets towing, cargo, and daily driving needs.
Explore More:
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