Adaptive Air Suspension Strut Leakage and Compressor Burnout
SeriousSuspension & ChassisTop-spec UK LS 430 models feature electronically modulated height-adjustable pneumatic air suspension. Over time, the internal rubber air bladders suffer from dry rot and cracking caused by UK road salt and grit accumulation around the lower folds. Slow air leaks cause the car to drop onto its bump stops overnight, forcing the onboard 12V air compressor to run continuously to maintain ride height. This eventually burns out the compressor motor and relay, leaving the vehicle uncomfortably low and triggering suspension warning messages.
One corner or the entire vehicle sitting visibly low after being parked for more than a few hours, Air compressor pump audibly running for prolonged periods behind the front bumper, Height High warning light illuminating on the instrument cluster or refusal to change ride height, Harsh, bouncy, and jarring ride quality over normal road imperfections
- Inspect the car before it has been started in the morning to confirm equal ride height at all four arches
- Press the height-adjustment button on the centre console and verify the chassis raises smoothly within 30 seconds
- Listen for hissing air leaks around the strut tops under the bonnet and wheel arches