MajorVery commonSuspension

Lexus GS: Air Suspension Compressor Motor Failure (S190 GS)

Air Suspension Compressor Motor Failure (S190 GS) is a very common suspension fault on the Lexus GS on the 2005–2012 cars, and we rate it major. Putting it right costs $1,600 to $3,500 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 19 documented faults on the Lexus GS.

Vehicle: Lexus GS
Years: 2005–2012
Fuel: petrol
Gearbox: auto
System: Suspension

This page covers the Lexus GS as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Lexus GS faults19 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the Air suspension strut yet. We would rather show none than show a picture of a different part.

What goes wrong

The S190 GS300, GS430, and GS460 use a Wabco-supplied air suspension compressor as standard equipment. The compressor motor's carbon brushes and internal reed valves wear out with age, causing loss of pumping capacity. The car sags at the rear or sits unevenly. On cold mornings the compressor may run for several minutes to achieve correct height, eventually failing to reach target pressure at all. This is one of the most commonly reported faults on S190 GS models worldwide and is considered near-certain at 15+ years of age.

What you would notice

Car sitting low at the rear, especially after being parked overnight
Compressor running continuously for more than 2–3 minutes after startup
Soft or wallowing ride quality — suspension not returning to correct height
Suspension fault warning on the multi-information display
Compressor making a laboured, struggling motor noise

How to check it

Where to look. Air suspension compressor in boot/trunk floor well or under-boot access panel; air struts at all four corners

Park the car overnight and check ride height at the rear corners in the morning.
Start the engine and listen for the compressor — it should cycle briefly and stop within 30–60 seconds.
Inspect rubber air lines at suspension struts for cracks.
If a workshop inspection is possible: A scan tool can read suspension height sensor values and active fault codes.

Parts involved: Air suspension strut.

What it costs to put right

$1,600 to $3,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Does the car sit level at all four corners?”
“Does the compressor run a long time after starting?”
“Has any air suspension work been done on the car?”

Now check the Lexus GS you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Lexus GS buyer questions

Is air suspension compressor motor failure (s190 gs) serious on a Lexus GS?

We rate it major and very common on the Lexus GS. The S190 GS300, GS430, and GS460 use a Wabco-supplied air suspension compressor as standard equipment. The compressor motor's carbon brushes and internal reed valves wear out with age, causing loss of pumping capacity. The car sags at the rear or sits unevenly. On cold mornings the compressor may run for several minutes to achieve correct height, eventually failing to reach target pressure at all. This is one of the most commonly reported faults on S190 GS models worldwide and is considered near-certain at 15+ years of age.

How much does it cost to fix on a Lexus GS?

$1,600 to $3,500 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Lexus GS years are affected?

Our research records this fault on the 2005–2012 Lexus GS. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

Park the car overnight and check ride height at the rear corners in the morning. Start the engine and listen for the compressor — it should cycle briefly and stop within 30–60 seconds. Inspect rubber air lines at suspension struts for cracks. If a workshop inspection is possible: A scan tool can read suspension height sensor values and active fault codes. Look here: Air suspension compressor in boot/trunk floor well or under-boot access panel; air struts at all four corners