Lexus GS (Mk3) Common Problems & Reliability
The third-generation GS is a luxury powerhouse, especially in GS 450h hybrid form. However, at this age, expensive repairs to the braking and suspension systems are common.
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Detailed fault breakdown, symptoms, and estimated repair bills by production year.
Most Common Lexus GS (Mk3) Faults & Repair Costs
Brake Actuator Failure
The hydraulic brake actuator is a common failure point on this generation, leading to a loss of power assistance and a very high repair bill.
Brake warning lights, Constant humming/cycling from under the bonnet, Barking noise when pressing the pedal
- Listen for the brake pump cycling too frequently (more than once every few presses)
- Check for ABS-related fault codes
Leaking Rear Shock Absorbers
The Adaptive Variable Suspension (AVS) shocks are prone to leaking and are extremely expensive to replace with OEM parts.
Mist of oil on the shock absorber body, Bouncy ride, AFS warning light on dashboard
- Inspect the rear shocks for oil leaks
- Check if the car sits level
Buying a used Lexus GS (Mk3)? Always check for hidden finance and write-off history.
Mechanical problems are only half the battle. Over 1 in 3 UK used cars checked have unpaid finance or accident write-off records that could cause you to lose the car or thousands in value.