2003 Lexus GX470 Problems

RepairPal has identified the most common problems with the 2003 Lexus GX470 as reported by actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.

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10
Known Problems

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:

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.

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.

The Check Engine Light may illuminate with various EVAP system fault codes stored. Our technicians tell us this may be caused by a sticking EVAP Purge Vacuum Switching valve. An improved valve is now available to remedy this problem.

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 air conditioning switch may flash due a faulty AC compressor clutch relay. The AC operation may be erratic while the light is flashing. Our technicians tell us an improved relay is available which should correct this concern.

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.

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.