Do 4Runners use leaf springs?

Yes, Toyota 4Runners use leaf springs in their rear suspension. Leaf springs are a type of suspension system that has been commonly used in trucks, SUVs, and other off-road vehicles for decades.

What are Leaf Springs?

Leaf springs are a type of suspension system that uses a series of curved metal leaves, or blades, stacked on top of each other. The leaves are secured at one end to the vehicle's frame and at the other end to the axle or suspension component. As the vehicle encounters bumps or uneven terrain, the leaf springs flex and compress, absorbing the impact and providing a smooth ride.

Why Do 4Runners Use Leaf Springs?

Toyota 4Runners, as well as many other body-on-frame SUVs and trucks, use leaf springs in their rear suspension for several reasons:

• Durability: Leaf springs are known for their ruggedness and ability to withstand heavy loads, making them well-suited for off-road use and towing.


• Simplicity: Leaf spring suspensions are relatively simple in design, which can make them easier and less expensive to manufacture and maintain.


• Ride Height Adjustment: The height of the vehicle can be adjusted by adding or removing leaf springs, allowing for customization and improved off-road capability.


• Load Capacity: Leaf springs can support heavier loads, such as those found in trucks and SUVs, better than some other suspension systems.

While leaf springs have their advantages, some modern SUVs and trucks are transitioning to independent rear suspension systems, which can offer improved ride quality and handling characteristics.

Conclusion

In summary, yes, Toyota 4Runners use leaf springs in their rear suspension. Leaf springs are a durable and simple suspension system that has been commonly used in trucks, SUVs, and other off-road vehicles for many years. The use of leaf springs in the 4Runner helps provide the vehicle with the necessary strength and capability for off-road adventures.

What is the most common problem with the Toyota 4Runner?

The most common problems with Toyota 4Runners are rust on the frame and body, especially on models from 2003-2009, and issues with the infotainment system and electronics, particularly in newer models. Other frequent complaints include paint peeling on certain colors and model years, brake issues, and various interior/exterior trim problems. 
Rust and frame issues

• Frame rust: Models from 2003-2009 are particularly susceptible to excessive frame rust due to a defective undercarriage. 
• Body rust: Rust can also be a problem with the body, especially around the rear hatch emblem, which has been reported in newer models. 

Electronics and infotainment

• Infotainment: Newer 4Runners have reported issues with the infotainment system, including infotainment screens not recognizing Apple CarPlay and Apple CarPlay compatibility issues with USB-C phones. 
• Other electronics: Problems like the radio locking up and intermittent electronic issues have been reported in some model years. 

Paint and body hardware

• Peeling paint: Certain colors, like Blizzard Pearl and Super White on 2010-2015 models, are prone to peeling paint and received an extended warranty for this issue. 
• Body trim: Loose trim, especially on the tailgate, and paint damage from trim rubbing against the body have been reported. 

Mechanical and suspension

• Brakes: Owners have reported issues with fast-wearing brake pads and rotors, as well as problems with the master cylinder and calipers, which can lead to brake failure. 
• Suspension: The X-REAS suspension system, found on some models, can be expensive to replace when the shocks and struts need servicing. 
• Engine and drivetrain: While generally reliable, preventative maintenance is crucial. Some reports mention transmission issues like rough shifting. 

This video discusses the most common problems with the 5th generation Toyota 4Runner: 41sMaxTheCarGuyYouTube · Jan 7, 2023

What kind of rear suspension does a 4Runner have?

The 2025 Toyota 4Runner is built on the TNGA-F platform, shared with the Tacoma and Land Cruiser, and features a boxed ladder frame with a multi-link coil live rear axle for superior durability. Up front, the SUV uses a double wishbone independent suspension, enhancing its on- and off-road handling.

Does the 4Runner have leaf springs?

If you're facing suspension sag, a rough ride or an unnatural leaning to one side with your Toyota 4Runner, you may have encountered a problem with your leaf springs.

What year of 4Runner to avoid?

Years of Toyota 4Runner to avoid include 2003-2005, known for severe frame rust and head gasket issues, and 2001-2002, which are also prone to head gasket problems and early rust. Other problematic years are 1988-1989 and 1990-1995 (especially with the 3.0L V6), which can have head gasket failures. Additionally, the 2015 model should be approached with caution due to airbag issues. 
Early generations

• 1988-1989: These first-generation models are known for head gasket failures, especially those with the 3.0L V6 engine. 
• 1990-1995: Similar to the earlier years, the 3.0L V6 is prone to head gasket issues. Rust is also a major concern for frames and suspension components. 

Third and Fourth generations 

• 2001-2002: These models suffered from engine problems, including head gasket failures, and were the first to show significant signs of frame rust. 
• 2003-2005: This is arguably the most problematic generation. Owners report widespread severe frame rust, head gasket failures, cracked dashboards, and problems with the anti-lock braking system. The 2004 model year, in particular, has a high number of complaints for these issues. 

Fifth generation

• 2015: While generally considered reliable, this model year is notable for its airbag defects, where they did not deploy consistently. 

Other potentially problematic years

• 2010: This year experienced electrical faults and glitches with dashboard lights and sensors.