Debuted in 1984 as a durable, easy-to-own SUV built for adventure-seekers, the Toyota 4Runner has been a mainstay on U.S. roads for decades. Rugged, capable, and surprisingly practical, it appeals to off-roaders, families, and anyone who wants a reliable hauler. Its body-on-frame construction and durable drivetrain earned it a reputation few competitors can match. But not every iteration lives up to that reputation. Certain model years developed persistent problems that actually make them, well, poor choices today. After all, over time, former “Best Years” can lose steam…and even slide far under their past placement in fandom. Here’s a breakdown of the Toyota 4Runner years to avoid, based on reliability issues, rust, and owner complaints.

1990 to 1995 Toyota 4Runner

Second-gen 4Runners from this period, especially those with the 3.0-liter V6, are notorious for head gasket failures. Overheating often leads to costly engine repairs. Rust is another major concern. Frames and suspension components, particularly in states that use road salt in winter, can be badly corroded.

Why avoid? Frequent engine failures and rust-prone frames make these early 90s models a gamble for buyers.

2001 to 2002 Toyota 4Runner

Late third-gen 4Runners generally improved reliability, but 2001 and 2002 models are exceptions.

These days, they’re just more likely to have safety and reliability issues. This includes early head gasket problems. Rust can still be a concern, so thorough inspections are essential.

Why avoid? Safety ratings and reliability concerns make these specific years less desirable.

2003 to 2005 Toyota 4Runner

The fourth generation kicked off in 2003, but the early years are infamous. Not for positive reasons, either. Severe frame rust, head gasket failures, and cracked dashboards are common. These vehicles often need expensive repairs just to keep them roadworthy.

Why avoid? At this point, between structural rust and drivetrain issues, 2003 to 2005 4Runners fall short of Toyota’s usual reliability.

2015 Toyota 4Runner

Fifth-gen 4Runners are generally solid, but the 2015 model had several quirks.

Owners reported infotainment glitches, Bluetooth connectivity problems, steering complaints, and warped brake rotors. These issues make the 2015 less appealing than other fifth-gen years.

Why avoid? Electronics and braking problems make this model a headache compared to 2017 to 2021 4Runners.

Quick shopping tips for a used Toyota 4Runner

• Check the frame and undercarriage for rust, especially in older models.
• Review maintenance history to ensure the vehicle was properly cared for.
• Have a trusted mechanic inspect the engine, transmission, and suspension for signs of wear or previous repairs.

Some “best bets” right now that are alternatives to the Toyota 4Runner years to avoid

If you’re shopping for a used 4Runner, look at late 3rd-generation models (2002) or 5th-generation models from 2017 to 2021 for dependability.

They tend to have fewer complaints and better reliability overall. Even then, a detailed inspection is non-negotiable.

The Toyota 4Runner remains a versatile SUV with a loyal following

But these specific years stand out for recurring issues, expensive repairs, or frustrating ownership experiences. Consider skipping them and you’ll have a much smoother road ahead.