Common Problems with the
2005–2011 Lexus GS (Mk3)

We've identified 2 known issues that can affect the 2005–2011 Lexus GS (Mk3). 1 of these are serious faults that could be expensive to repair.

Known Issues

Serious

Moderate

Minor

All Known Issues

SeriousBrakes

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.

Estimated cost: £1,800–£2,500Affects: 2005–2011Often appears around: 90,000+ miles

✓Listen for the brake pump cycling too frequently (more than once every few presses)
✓Check for ABS-related fault codes

ModerateSuspension & Chassis

The Adaptive Variable Suspension (AVS) shocks are prone to leaking and are extremely expensive to replace with OEM parts.

Estimated cost: £600–£1,000Affects: 2005–2011Often appears around: 70,000+ miles

✓On the GS 450h, ensure the hybrid battery has a recent "Hybrid Health Check" certificate from Lexus.
✓Listen for a clunking from the rear which usually indicates leaking shock absorbers (very common on cars with AFS).
✓Avoid the GS 300 if it shows signs of rough idling, as carbon buildup on valves can be an issue.

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