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SKU: 5540041 | UPC: 197244123876
KYB 03-09 Toyota 4Runner (Exc. X-Reas, Adj Susp.) Gas-A-Just Shock - Rear
KYB Gas-A-Just Rear Shock part 5540041 installs on 2003-2009 Toyota 4Runner excluding X-REAS and adjustable suspension plus select 2007-2009 FJ Cruiser models. Monotube construction with nitrogen gas charging controls body roll and maintains tire contact for handling on paved roads and trails. This rear shock restores factory ride dynamics while adding response to daily driving and off-road conditions with 25.12 inch extended length and 15.00 inch compressed length.
Key Features
- Monotube Design: Single tube layout resists fading for steady performance during extended drives or heavy loads
- Nitrogen Gas Charging: High-pressure gas prevents oil foaming to keep damping force consistent over bumps
- Application-Tuned Valving: Multi-stage valves match 4Runner and FJ Cruiser suspension for balanced ride comfort and control
- Seamless Steel Tube: Inverted construction adds strength without welds to handle rugged terrain impacts
- Machined Mounts: Solid eye and fork attachments ensure direct bolt-on fit without modifications
Product Notes
- Excludes vehicles equipped with X-REAS air suspension or adjustable height systems
- Sold as single rear shock verify pair needed for complete replacement
- Handles up to 25.12 inch extended length and 15.00 inch compressed length
Installation Notes
- Professional installation recommended.
- Use OEM or KYB replacement bushings RB2280 top and SB131 bottom
- Compatible with S1 upper mount and LS30 lower mount positions
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2003-2009 | Toyota | 4Runner | Limited |
| 2003-2009 | Toyota | 4Runner | Sport |
| 2003-2009 | Toyota | 4Runner | SR5 |
| 2007-2009 | Toyota | FJ Cruiser | Base |
| 2008 | Toyota | FJ Cruiser | Trail Teams Special Edition |
| 2007 | Toyota | FJ Cruiser | TRD Special Edition |
Why Choose KYB?
- KYB supplies over 55 million shocks yearly to vehicle manufacturers worldwide
- Meets or exceeds original equipment specifications for reliable long-term service
- Engineered with vehicle-specific testing for precise damping on Toyota platforms
Frequently Asked Questions
-
Q: Will this shock fit a 2006 Toyota 4Runner SR5 with standard suspension?
A: Yes it bolts directly to 2003-2009 4Runner SR5 models without X-REAS or adjustable suspension using S1 upper and LS30 lower mounts -
Q: What construction materials are used in this shock?
A: Steel monotube body with high-pressure nitrogen gas zinc plating for corrosion resistance and durable rubber bushings -
Q: What warranty coverage applies?
A: KYB offers limited lifetime warranty against manufacturing defects when installed properly
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Cardboard box 26in L x 4in W x 4in H
- Weight: 5.1 lbs
KYB
KYB offers a complete line of shock absorbers, struts, and strut assemblies for cars, trucks, SUVs and Cross-overs. We also design and manufacture steering stabilizers, and provide a full line of shock and strut accessories including mounting hardware, coil spring insulators, coil springs, strut mounts, jounce bumpers, and bellows. KYB is one of the world’s largest suppliers of shocks and struts for new vehicle manufacturers. Our products can be found on some of the most popular cars, SUVs and trucks in North America. Because we make ‘original equipment’ we know exactly how vehicles perform and handle when new, and we can help keep them operating as designed, for as long as they’re on the road. The KYB catalog includes the following models: Excel-G, Strut-Plus, Gas-a-Just, MonoMax, Truck-Plus, KYB JAOS, Truck-Plus, Leveling Assembly, Strut Mounts and Boots, Steering Stabilizers, Self-Leveling & Electronic Shocks.
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Shop shocks and struts at Black Ops Auto Works for improved ride control, handling, stability, comfort, towing support, off-road performance, and suspension replacement. This collection includes shock absorbers, monotube shocks, gas shocks, hydraulic shocks, strut assemblies, front struts, rear shocks, coil-over shocks, reservoir shocks, steering dampers, suspension hardware, and vehicle-specific dampers for cars, trucks, SUVs, Jeeps, off-road builds, and performance vehicles. Use this Shocks and Struts collection to find the right suspension upgrade by vehicle, ride height, driving style, and product type. Replacement shocks and struts help restore ride quality, performance shocks improve control and stability, heavy-duty truck shocks support larger vehicles and lifted setups, and off-road shocks help improve durability and control on rough terrain. Shop Shocks and Struts by Brand Black Ops Auto Works carries shocks, struts, and suspension dampers from trusted brands including Bils...
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Aftermarket suspension systems improve handling, ride quality, and ride height adjustment beyond what the factory suspension provides. From lowering springs and coilover kits for sport handling to lift kits and leveling kits for truck and SUV off-road capability, quality suspension components transform how a vehicle rides and handles. Popular Suspension Upgrades Popular suspension upgrades include coilover kits for adjustable ride height and damping, sport lowering springs for improved handling and reduced body roll, performance shock absorbers and strut assemblies, sway bar and end link upgrade kits, subframe brace kits, and complete suspension packages for lifted trucks and off-road SUVs. Alignment kits including camber bolts and camber arms are also frequently ordered after ride height changes. What is the difference between coilovers and lowering springs? Coilovers are complete shock and spring assemblies with adjustable ride height set by threading the spring perch on the shock...
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Looks pretty nice, pricing was good and the reinforcement is a big plus.
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