2003 Toyota 4RUNNER problems & reliability
527 owner complaints filed with NHTSA for the 2003 Toyota 4RUNNER, alongside 3 safety recall campaigns. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
8 complaints report injuries (8 injured).
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Structure | 278 | 53% |
| Suspension | 109 | 21% |
| Unknown OR Other | 97 | 18% |
| Service Brakes | 44 | 8% |
| Steering | 32 | 6% |
| Vehicle Speed Control | 23 | 4% |
| Power Train | 21 | 4% |
| Service Brakes, Hydraulic | 20 | 4% |
| Engine and Engine Cooling | 14 | 3% |
| Wheels | 11 | 2% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 128,500 miles (middle 50% between 90,000 and 165,000 miles), based on 378 complaints that included mileage.
Complaints by incident year
What owners report
“Severe frame rust. 2 large holes on the inside of the frame just back from the front wheels and 2 large holes at the ends of the rear crossmember.”
Structure · filed Jan 16, 2026
“Odometer Fraud. The contact investigated a 2003 Toyota 4 Runner. The contact stated that during the investigation, he discovered a fraudulent scheme of approximately 15 vehicles with odometer fraud. The contact stated that the suspects targeted Facebook Marketplace victims by spraying oil on the engine prior to…”
Electrical System · filed Oct 29, 2025
“While my mechanic was servicing a small exhaust leak on my vehicle he noticed that the chassis/frame of the vehicle was heavily corroded. He told me that he believe it was no longer safe to drive and that I contact Toyota. I had a local Toyota service center also look at it and they confirmed that the chassis/frame…”
Unknown OR Other · filed Sep 19, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- Frame corrosion
Defect Petition DP18002 · opened Aug 17, 2018 · closed Mar 18, 2022
- Unintended and Uncontrolled Acceleration
Recall Query RQ10003 · opened Feb 16, 2010 · closed Mar 1, 2011 · led to recall 11V115000
Technical service bulletins
175 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2003 Toyota 4RUNNER. The 10 most recent:
The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix with rainwater, nighttime dew, or high humidity to form acidic compounds. If these contaminants settle and…
T-SB-0039-24 Rev2 · Service Bulletin/Repair Instructions · issued Dec 6, 2024
To prevent brake rotor rust from forming during transportation and storage, wheel film will be used instead of a cardboard type of anti-rust cover. The purpose of the wheel film is to shield the disc brake rotor from…
T-SB-0038-24 Rev2 · Service Bulletin/Repair Instructions · issued Dec 6, 2024
Acid rain results from rainwater or other airborne moisture that become acidic due to industrial chemical impurities in the atmosphere. If these acidic compounds settle on an exposed vehicle, especially the horizontal…
T-SB-0035-24 Rev2 · Service Bulletin/Repair Instructions · issued Dec 6, 2024
Toyota vehicles are currently protected with RapgardTM protective film designed to protect the horizontal painted surfaces. This material protects from acid rain, environmental fallout, and rail contamination. Follow…
T-SB-0061-23 Rev2 · Service Bulletin/Repair Instructions · issued Dec 5, 2024
Vehicles may occasionally be subjected to contamination by airborne iron particles shed from railroad tracks, train wheels, exposure to heavy machinery facilities, grinding, welding, etc. This type of contamination can…
T-SB-0062-23 Rev2 · Service Bulletin/Repair Instructions · issued Dec 3, 2024
The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix with rainwater, nighttime dew, or high humidity to form acidic compounds. If these contaminants settle and…
T-SB-0039-24 Rev1 · Service Bulletin/Repair Instructions · issued Jul 12, 2024
To prevent brake rotor rust from forming during transportation and storage, wheel film will be used instead of a cardboard type of anti-rust cover. The purpose of the wheel film is to shield the disc brake rotor from…
T-SB-0038-24 Rev1 · Service Bulletin/Repair Instructions · issued Jul 12, 2024
Acid rain results from rainwater or other airborne moisture that become acidic due to industrial chemical impurities in the atmosphere. If these acidic compounds settle on an exposed vehicle, especially the horizontal…
T-SB-0035-24 Rev1 · Service Bulletin/Repair Instructions · issued Jul 12, 2024
The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix with rainwater, nighttime dew, or high humidity to form acidic compounds. If these contaminants settle and…
T-SB-0039-24 Rev1 · Service Bulletin/Repair Instructions · issued Jul 12, 2024
To prevent brake rotor rust from forming during transportation and storage, wheel film will be used instead of a cardboard type of anti-rust cover. The purpose of the wheel film is to shield the disc brake rotor from…
T-SB-0038-24 Rev1 · Service Bulletin/Repair Instructions · issued Jul 12, 2024
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
The 2003 Toyota 4RUNNER has 3 NHTSA recall campaigns — recall repairs are free at franchised dealers regardless of the vehicle’s age.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2003 Toyota 4RUNNER?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 128,500 miles — budget accordingly if the car is approaching that mileage.