2003 Lexus GX470 Problems
RepairPal has identified the most common problems with the 2003 Lexus GX470 based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.
Various radio issues may develop, including: volume control, radio shuts off by itself, or the radio screen is scrambled or blank. Our technicians tell us an improved radio is available to address these concerns.
A seat position sensor fault code, B1153 may be set. Our technicians tell us a revised wire harness is available which should correct this concern.
Drivers may hear a loud noise, much like a vacuum cleaner, coming from their engine on cold starts. This affects the 2003-2004 Lexus GX470.
The noise is from the secondary air pump, which sends hot air to the catalytic converter when the engine is cold. This allows the catalytic converter to clean exhaust better, and lower emissions while the engine is warming up.
Pump failure may result in:
- Check engine light
- OBD trouble code P1445
- Smog test failure
Fixing the issue involves removal of the intake manifold, and replacement of the secondary air pump.
A clunk type noise may be noted from the rear of the vehicle just before or just after coming to a stop. Our Technicians tell us a revised rear driveshaft and rear suspension control arms are available to correct this concern.
The sunroof may not close correctly or jam due to alignment issues. Our technicians tell us a wind deflector kit is available to correct this issue.
The airbag warning light may illuminate whit code B0111 and/or B0116 stored. Our technicians tell us the an updated wiring harness is available which should correct this concern.
An inconsistent or unusual feeling may be noted on brake application. Our technicians tell us a new anti-squeal shim is available which should correct this concern.