MajorCommonSuspension

Audi A7: Adaptive air suspension strut leaks and compressor failure (C7)

Adaptive air suspension strut leaks and compressor failure (C7) is a common suspension fault on the Audi A7 on the 2011–2018 cars, and we rate it major. Putting it right costs $1,200 to $5,500 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 6 documented faults on the Audi A7.

Vehicle: Audi A7
Years: 2011–2018
System: Suspension

This page covers the Audi A7 as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Audi A7 faults6 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 or Shock absorber / strut yet. We would rather show none than show a picture of a different part.

What goes wrong

A7s fitted with the optional adaptive air suspension use combined air-spring struts that perish with age, most often at the rubber bellows and the top O-ring seal. A leaking strut makes one corner sag after the car has been parked, and the compressor then runs constantly to keep up until it overheats and fails too, turning a single-strut job into a bigger bill. Heat and age are the enemy, so older cars and those that have sat for long periods are most at risk. There is no recall or extended cover; aftermarket struts from reputable brands are the usual independent repair.

What you would notice

One corner sitting lower than the others after being parked overnight
Suspension warning light or vehicle too low message
Compressor buzzing or running for a long time after start-up
Harsh, crashing ride or bouncing over bumps
Hissing noise near a wheel after switching off

How to check it

Where to look. Air struts at all four wheels; compressor and valve block under the car

If you can, see the car after it has sat overnight and before the seller has started it. Crouch at each corner and compare the gap between tyre and wheel arch; one corner lower than the others is the classic sign. Start the engine and listen near the rear of the car for the compressor running longer than about a minute. In the MMI, switch drive select through comfort and dynamic and watch that the car rises and lowers evenly with no warning. On the test drive, listen for knocks and feel for a floaty or crashing ride. Ask if any struts or the compressor have been replaced. If a workshop inspection is possible: spray soapy water on each strut air bag and top fitting to find leaks, and scan the level control module for stored air suspension fault codes.

Parts involved: Air suspension strut, Shock absorber / strut.

What it costs to put right

$1,200 to $5,500 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 have air suspension or conventional springs?”
“Does it ever sit low at one corner after being parked?”
“Have any air struts or the compressor been replaced, and when?”

Now check the Audi A7 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 the sources below. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them.

Euro Premium Parts: Used Audi A7/S7 C7 Buying Guide (air suspension struts leak with age)
Audi Owners Club UK: Audi A6 (C7) Forum, Air suspension fault thread
Euro Auto Pro (AU): Common Problems of Audi A7 4G 3.0 TFSI, suspension wear and air suspension leaks

Audi A7 buyer questions

Is adaptive air suspension strut leaks and compressor failure (c7) serious on a Audi A7?

We rate it major and common on the Audi A7. A7s fitted with the optional adaptive air suspension use combined air-spring struts that perish with age, most often at the rubber bellows and the top O-ring seal. A leaking strut makes one corner sag after the car has been parked, and the compressor then runs constantly to keep up until it overheats and fails too, turning a single-strut job into a bigger bill. Heat and age are the enemy, so older cars and those that have sat for long periods are most at risk. There is no recall or extended cover; aftermarket struts from reputable brands are the usual independent repair.

How much does it cost to fix on a Audi A7?

$1,200 to $5,500 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 Audi A7 years are affected?

Our research records this fault on the 2011–2018 Audi A7. 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.