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Toyota 4Runner Common Problems and Repair Costs
The Toyota 4Runner has documented issues used buyers should know about — including frame rust. Here's a full breakdown by model year.
Known Issues — Toyota 4Runner (1990–2026)
Frame rust
same issue as Tacoma in salt-belt states
📅 2003–2009⚠️ High
Timing chain stretch on 4.0L V6 at high mileage
📅 2003–2015⚡ Medium
What to Check Before Buying
- Run a VIN report for accidents and title issues
- Ask about Frame rust — verify it has been addressed
- Check recalls at NHTSA.gov/recalls
- Have an independent mechanic inspect it ($100–$200)
- Ask for complete service records
Reliability Overview
The Toyota 4Runner can be a solid vehicle when maintained, but the issues above represent real financial risk. A pre-purchase inspection by a Toyota-familiar mechanic is strongly recommended.
Research Before You Buy
RepairIQ's Before You Buy tool shows known issues, repair costs, and a pre-purchase checklist for any Toyota 4Runner.
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