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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 Reviewed A top-rated pick with lots of positive feedback | Dorman 929-145 Rear Leaf Spring |  |
| Most Popular A crowd favorite that many people choose with confidence | Dorman 929-301 Rear Leaf Spring |  |
| Best Quality Built to a higher standard if you want something more solid | ALMULOO 3.5" Lift Rear Leaf Spring Pair for 2005–2023 Toyota Tacoma |  |
| Best Budget The cheapest option that still gets the job done reliably | Dorman 722-041 Rearward Leaf Spring Shackle |  |
| Most Sold A high-volume bestseller chosen again and again | Dorman 90-235HD Rear Leaf Spring |  |
| Best Value for Money The sweet spot between price and what you get | Skyjacker R225 Rear Add-A-Leaf Helper Spring Pair |  |
| Best Overall The best all-around choice for most situations | Dorman 43-1261HD Rear Leaf Spring (replacement) |  |
1. Dorman 929-145 Rear Leaf Spring
| Manufacturer Part Number | 929-145 |
|---|---|
| OEM Part Number | 4L3Z5560MC |
| Hollander Number | 518-662A |
| Exterior | Ready To Paint If Needed |
| Item model number | 929-145 |
This Dorman rear leaf spring is a direct-replacement suspension component intended to restore load-carrying and ride characteristics when an original spring is worn, cracked, or corroded. Installers use it in the rear suspension to regain correct ride height, axle location, and load support; it is engineered to match factory fit and mounting points for the listed applications. Notable features include corrosion resistance, factory-style fitment, and Dorman’s testing for fatigue and durability, which together aim to give long service life in daily driving and light-duty hauling. Practical benefits are straightforward: it lets you perform a like-for-like repair without modifying other suspension parts, and it can be paired with replacement shackles or hardware for a more complete job. Limitations are that fitment must be confirmed for the exact vehicle trim before purchase and that the product is a single leaf spring so matching the opposite side or replacing associated components may be necessary for balanced performance.
Best for: Reliability-focused DIYers and independent shops that prioritize restoring factory suspension performance and long-term dependability for routine driving and light hauling.
Less Ideal for: Buyers seeking a performance or load-enhancing aftermarket upgrade or those who prefer a complete axle kit including both springs and all hardware in one purchase should look elsewhere.
- Designed as a direct factory-style replacement for specified applications
- Built and tested for corrosion resistance and fatigue for longer service life
- Matches mounting points to simplify installation and reduce need for modifications
- Requires confirming exact trim fitment before purchase to ensure compatibility
- Sold as a single spring so buyers often need a matching unit or additional hardware for a full axle repair
Verdict A dependable, factory-fit replacement leaf spring aimed at repairs where restoring original suspension function and longevity is the priority.
2. Dorman 929-301 Rear Leaf Spring
| Manufacturer | Dorman Products |
|---|---|
| Model | 929-301 |
| Position | Rear |
| OEM Part Number | 4886185AB; 4886187AB; 52000545AB |
This Dorman rear leaf spring is a direct-replacement suspension leaf designed to restore sagging rear ends and recover payload support. It installs in place of a worn or damaged factory spring and is typically used when the rear sags under load, after collision damage, or when corrosion has weakened the original part. The unit is built to match original fit and function and ships with installed bushings to simplify installation. In practice it raises ride height back toward new condition and improves handling and comfort compared with tired springs. Installation can be hands-on and may require PB Blaster, a jack for alignment, and time to seat the spring; expect some initial settling in the weeks after fitment. The product is paint-ready if you want additional corrosion protection. Limitations include the need for proper fit confirmation for your specific vehicle and the manual effort to install leaf springs safely; this is a replacement spring rather than an upgrade for heavier loads or performance tuning.
Best for: Convenience-driven buyers who want a straightforward, factory-quality replacement to restore ride height and everyday handling without sourcing aftermarket performance upgrades.
Less Ideal for: Buyers seeking a heavy-load upgrade, aftermarket lift, or performance-tuned leaf spring should consider purpose-built alternatives instead.
- Direct replacement designed to match factory fit and function
- Comes with bushings preinstalled to simplify installation
- Durable construction intended for long service life
- Ready-to-paint exterior for added corrosion protection or matching finish
- Installation is labor intensive and may require penetrating lubricant and special tools
- Not marketed as a heavy-duty or lift-oriented spring, so it may not suit load-boost or lift projects
Verdict A practical, factory-style rear leaf spring to restore sagging suspension for convenience-minded owners, but not a heavy-load or lift upgrade.
3. ALMULOO 3.5" Lift Rear Leaf Spring Pair for 2005–2023 Toyota Tacoma
| Auto Part Position | Rear |
|---|---|
| Material | Alloy Steel |
| Included Components | 1 pair of rear leaf springs |
| Maximum Lifting Height | 3.5 Inches |
| Exterior | Powder Coated |
These rear leaf springs replace the factory rear springs to provide a 3.5-inch suspension lift for 2005–2023 Toyota Tacoma models that already sit at that lift height. Made from alloy steel with a powder-coated finish, the pair is intended to improve rear ride height, reduce sag under load, and limit nose dive when towing or hauling. Typical use is as part of a lift conversion or to replace worn, sagging springs; installation uses existing mounting points but usually requires pry bars, C-clamps, and professional alignment of related components. The springs come as a matched pair and include some installation accessories but no detailed instructions, so plan for workshop time and possible additional parts such as driveline spacers or brake-line relocation hardware when integrating into a lifted Tacoma. The powder coat helps corrosion resistance, but buyers should expect a professional installation and complementary front-end adjustments to keep driveline and handling geometry correct.
Best for: Performance-oriented owners upgrading a Tacoma's rear suspension who prioritize improved load control and a reliable 3.5" lift solution for hauling or off-road setup.
Less Ideal for: Drivers seeking a simple bolt-on lift for a stock-height Tacoma or those who want a complete lift kit with front-end components and instructions included.
- Vehicle-specific fit for 2005–2023 Toyota Tacoma with 3.5" lift, avoiding guesswork on compatibility.
- Powder-coated alloy steel construction for improved corrosion resistance and durability.
- Supplied as a matched pair to maintain balanced rear suspension behavior.
- Designed to restore ride height and reduce rear sag under heavy loads, improving towing stability.
- Intended only for Tacomas already at a 3.5" lift so not suitable for stock-height trucks.
- No detailed installation instructions included, increasing reliance on professional installation or advanced DIY skills.
- May require additional parts and front-end adjustments such as driveline spacers, diff drops, or brake-line relocation to fit correctly.
Verdict A durable, vehicle-specific rear leaf spring pair that gives a true 3.5" lift and stronger load control for performance-focused Tacoma owners, but plan for professional installation and supporting parts.
4. Dorman 722-041 Rearward Leaf Spring Shackle
| Manufacturer Part Number | 722-041 |
|---|---|
| OEM Part Number | 0448304080; 0448304081 |
| Exterior | Ready To Paint If Needed |
| Model | 722-041 |
This rearward leaf spring shackle from Dorman replaces a worn or rusted factory shackle to restore the rear suspension pivot on compatible Toyota Tacoma trucks. It is made from stamped steel with a power coat finish to resist corrosion and is supplied with the essential installation hardware so a mechanic or a competent DIYer can swap it in without sourcing extra parts. In service the part performs like the factory unit, maintaining correct leaf spring alignment and rear ride geometry when installed. The powder coating and steel construction help it resist salt and road grime, though heavy off-road users may eventually see surface wear over time. Fitment is listed for Tacoma model years 2005–2018 so verify your exact trim before buying. This is a budget-focused replacement that gives factory-style function and straightforward installation, but it is not an upgraded high-clearance or heavy-duty aftermarket shackle for extreme load or off-road builds.
Best for: Budget-conscious owners who want a reliable, factory-style fix to restore rear suspension function on supported Toyota Tacoma models without paying for premium aftermarket upgrades.
Less Ideal for: Owners building a heavy-load or extreme off-road 4Runner setup should look for purpose-built heavy-duty shackles or specialized suspension upgrades instead.
- Direct replacement designed to match factory mounting and restore proper leaf spring alignment
- Powder-coated steel construction provides corrosion resistance for longer service life
- Includes necessary installation hardware for a straightforward swap
- Compatible with many Tacoma model years so it fits common replacement needs
- Not marketed as a heavy-duty or high-clearance upgrade for severe off-road or heavy-load use
- Surface finish may eventually show wear under frequent harsh off-road exposure
Verdict A cost-effective, factory-style replacement shackle that restores rear suspension function on supported Toyota Tacomas but is not intended as a heavy-duty off-road upgrade.
5. Dorman 90-235HD Rear Leaf Spring
| Manufacturer | Dorman Products |
|---|---|
| Model | Dorman 90-235HD |
| Exterior | Ready To Paint If Needed |
| OEM Part Number | 90-235HDDAY; 90-235HDHUS; 4821004330 |
This Dorman rear leaf spring is a direct replacement intended to restore rear suspension support and ride stability on compatible Toyota trucks. It replaces a worn or damaged factory leaf pack so the vehicle can again carry payload and maintain proper ride height and handling. The part is engineered to match factory fit and mounting points for straightforward installation and is corrosion-resistant and fatigue-tested for long service life. In practice it is used when a leaf has cracked, sagged, or been compromised by overloading or collision; pairing it with related hardware like shackles makes for a complete repair. Limitations are that fitment must be confirmed for your exact trim and year before purchase and professional installation or proper alignment is recommended to ensure correct ride height and load distribution. This is a practical, reliable replacement when you want a factory-quality repair without resorting to used parts.
Best for: Risk-averse mainstream buyers seeking a dependable, factory-quality replacement for a failing rear leaf spring and prioritizing a straightforward, long-term repair.
Less Ideal for: Drivers looking to change suspension characteristics for performance or lift purposes should consider purpose-built aftermarket packs instead.
- Designed to match factory fit and function for specified Toyota applications
- Corrosion-resistant construction and fatigue-tested for durability
- Suits replacement of springs damaged by overloading, cracking, or corrosion
- Requires confirming exact year and trim compatibility before purchase
- Professional installation recommended to ensure correct ride height and handling
Verdict A factory-fit replacement leaf spring that restores rear suspension support on compatible Toyota models without the uncertainty of used parts.
6. Skyjacker R225 Rear Add-A-Leaf Helper Spring Pair
| Auto Part Position | Rear |
|---|---|
| Material | Alloy Steel |
| Maximum Lifting Height | 2 Inches |
| Automotive Fit Type | Vehicle Specific Fit |
Skyjacker's R225 add-a-leaf kit slips into the rear leaf pack to reduce sag and add about 1.5 to 2 inches of lift, making it a low-cost way to restore ride height or support heavier loads. Typically installed by removing the factory leaf pack or inserting the helper leaf into the existing assembly, it uses machined American alloy steel and includes tie bolts for retention. For a Toyota 4Runner this is a straightforward solution to eliminate rear sag from worn springs and improve load capacity without replacing the entire spring pack. Real-world benefits include easier installation than a full spring swap, a firmer rear under load, and improved appearance from a higher stance. Expect some changes to handling: the rear will be stiffer and you may need minor front-end adjustments or an alignment after installation to maintain level stance. Installation can require longer U-bolts or minor fabrication on older trucks, and add-a-leafs do not restore original spring travel the same way a full replacement leaf pack would.
Best for: Practical optimizers who want an affordable way to fix rear sag or add modest lift to a Toyota 4Runner without replacing the entire spring pack and who prefer a straightforward, component-level upgrade.
Less Ideal for: Drivers seeking a full restoration of original ride comfort or precise leveling across axles should consider complete replacement leaf packs or a full suspension rework instead.
- Restores rear ride height and reduces sag without replacing the full spring pack
- Constructed from American alloy steel for durability
- Includes tie bolts for a secure fit into the factory leaf assembly
- Provides roughly 1.5 to 2 inches of lift useful for light loads and improved stance
- Does not return full factory spring travel or the ride characteristics of a new leaf pack
- May require longer U-bolts or minor modifications for proper fitment
- Can make the rear noticeably firmer which affects handling balance
Verdict A cost-effective, durable add-a-leaf for Toyota 4Runner owners who want to cure rear sag or gain modest lift without a full spring replacement.
7. Dorman 43-1261HD Rear Leaf Spring (replacement)
| Manufacturer | Dorman Products |
|---|---|
| Model | Dorman 43-1261HD |
| Manufacturer Part Number | 43-1261HD |
| Compatible Vehicles (examples) | Ford F-250/F-350 1999–2007 (confirm fit for Toyota 4Runner) |
This Dorman rear leaf spring is a direct replacement designed to restore rear suspension support and ride height on compatible vehicles. In practice it swaps in where a factory leaf spring has sagged, cracked, or been damaged by heavy loads, returning load-carrying ability and reducing rear sag under payload. The listing highlights durable, heavy-duty construction and a ready-to-paint exterior for a tidy installation and longer service life. Buyers report the part lines up with factory mounting points for straightforward installation and can increase rear height and payload capacity compared with worn springs. It is a straightforward, single-component fix rather than an upgrade package, so you should plan normal suspension reassembly and alignment work during installation. This part’s fit must be confirmed for your 4Runner trim and year before purchase because leaf spring dimensions and mounting details vary by model year and trim level.
Best for: A balanced all-round buyer who wants a reliable, factory-style replacement to restore ride height and load capacity without chasing premium suspension upgrades.
Less Ideal for: Not a good choice for drivers seeking a multi-component suspension lift or a tuned off-road upgrade that requires matched shackles, blocks, or shocks.
- Direct replacement intended to match factory fit and mounting points
- Heavy-duty construction for improved load support compared with worn springs
- Ready-to-paint exterior lets you restore appearance after installation
- Product listing requires checking vehicle fitment; fit is not universal across years and trims
Verdict A dependable aftermarket leaf spring for restoring rear support and ride height, but confirm fitment to your 4Runner before ordering.
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.
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.
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.
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.
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