MajorCommonBody & Rust

Audi TT: 8J TT Roadster Convertible Roof Hydraulic Mechanism Failure

8J TT Roadster Convertible Roof Hydraulic Mechanism Failure is a common body & rust fault on the Audi TT on the 2007–2014 cars, and we rate it major. Putting it right costs $800 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 17 documented faults on the Audi TT.

Vehicle: Audi TT
Years: 2007–2014
System: Body & Rust

This page covers the Audi TT 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 TT faults17 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph for this fault yet. We would rather show none than show a picture of something else.

What goes wrong

The 8J TT Roadster uses a hydraulic soft-top mechanism to open and close the convertible roof. The hydraulic pump motor, hydraulic cylinders, and micro-switch position sensors all degrade with age. Failure typically results in the roof stopping mid-cycle and refusing to fully open or close. Running the hydraulic system with low or degraded hydraulic fluid burns out the pump motor. In NZ's diverse climate, the convertible seals also shrink and leak, and the fabric hood can delaminate or tear at the rear tension points. Repair of a failed hydraulic system is expensive and parts availability is reducing.

What you would notice

Roof stops partway through the open or close cycle
Roof operation is very slow or requires multiple button presses to complete
Hydraulic pump motor audible running continuously when the roof is stationary
Water leaks from the roof seals into the cabin at the A-pillars or rear quarter

How to check it

Where to look. Boot area — hydraulic pump unit; roof frame and pivots at the B-pillar area

Operate the roof through a full open and close cycle and confirm it completes without hesitation or stopping.
Inspect the hydraulic fluid reservoir (typically in the boot) for level and cleanliness.
Check the fabric hood for delamination, tears, or fading.
Inspect the rear window (glass or plastic) for crazing or delamination.
Feel the door seals and roof seals for hardness or gaps.
Check the A-pillar seal compression.

What it costs to put right

$800 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 roof open and close smoothly through the full cycle every time?”
“When was the hydraulic fluid last checked or changed?”
“Are there any known leaks from the roof seals?”

Now check the Audi TT 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.

Audi TT buyer questions

Is 8j tt roadster convertible roof hydraulic mechanism failure serious on a Audi TT?

We rate it major and common on the Audi TT. The 8J TT Roadster uses a hydraulic soft-top mechanism to open and close the convertible roof. The hydraulic pump motor, hydraulic cylinders, and micro-switch position sensors all degrade with age. Failure typically results in the roof stopping mid-cycle and refusing to fully open or close. Running the hydraulic system with low or degraded hydraulic fluid burns out the pump motor. In NZ's diverse climate, the convertible seals also shrink and leak, and the fabric hood can delaminate or tear at the rear tension points. Repair of a failed hydraulic system is expensive and parts availability is reducing.

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

$800 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 Audi TT years are affected?

Our research records this fault on the 2007–2014 Audi TT. 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?

Operate the roof through a full open and close cycle and confirm it completes without hesitation or stopping. Inspect the hydraulic fluid reservoir (typically in the boot) for level and cleanliness. Check the fabric hood for delamination, tears, or fading. Inspect the rear window (glass or plastic) for crazing or delamination. Feel the door seals and roof seals for hardness or gaps. Check the A-pillar seal compression. Look here: Boot area — hydraulic pump unit; roof frame and pivots at the B-pillar area