Brake Actuator Failure
SeriousBrakesThe hydraulic brake actuator is a common failure point on this generation, leading to a loss of power assistance and a very high repair bill.
Est. Repair Cost: £1,800–£2,500
Reliability GuideCommon Problems with the
Common Problems with the
2005 Lexus GS (Mk3)
The 2005 launch of the Mk3 GS introduced Lexus's 'L-finesse' design language to the executive saloon class. It offered exceptional refinement and a superb Mark Levinson audio option, though early V6 models can suffer from carbon build-up.
What changed for 2005
- •Debut of the all-new Mk3 GS, featuring a sleeker, more aerodynamic design.
- •Introduction of the 3.0-litre V6 (GS 300) replacing the old straight-six.
Common MOT watch-outs
- !Wear on suspension components, particularly front lower ball joints.
- !Headlight beam pattern failures due to cloudy lenses or failing HID bulbs.
2
Known Issues
1
Serious
1
Moderate
0
Minor
All Known Issues
Leaking Rear Shock Absorbers
ModerateSuspension & ChassisThe Adaptive Variable Suspension (AVS) shocks are prone to leaking and are extremely expensive to replace with OEM parts.
Est. Repair Cost: £600–£1,000
Buying Tips for 2005 Lexus GS (Mk3)
- ✓On the GS 300, be aware of carbon build-up on the intake valves due to direct injection; a slightly rough idle is a warning sign.
- ✓Check the operation of the motorized drop-down control panel next to the steering wheel, as the mechanism can fail.