MajorCommonEngine

Audi A5: 2.0 TDI DPF Premature Clogging

2.0 TDI DPF Premature Clogging is a common engine fault on the Audi A5 on the 2007–2016 cars, and we rate it major. Putting it right costs $2,000 to $4,500 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 26 documented faults on the Audi A5.

Vehicle: Audi A5
Engine: 2.0L
Years: 2007–2016
Fuel: diesel
System: Engine

This page covers the Audi A5 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 A5 faults26 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the Diesel particulate filter yet. We would rather show none than show a picture of a different part.

What goes wrong

The A5 8T fitted with the 2.0 TDI (CAHA) shares the same DPF regeneration vulnerability as other VAG 2.0 TDI applications. Passive and active DPF regeneration requires sustained exhaust temperatures not achievable on urban or short-trip duty cycles. Repeated cold starts and stop-start urban use progressively block the filter beyond the point of self-cleaning. Compounding faults including EGR valve failure, injector wear, or a defective differential pressure sensor prevent the ECU from triggering regeneration even when motorway conditions are met, accelerating DPF failure.

What you would notice

DPF warning light on the instrument panel
Significant power loss with the engine in limp mode above 3,000 RPM
Engine consuming more fuel than normal during repeated regeneration attempts
White or grey exhaust smoke during attempted active regeneration at higher load

How to check it

Where to look. Exhaust system below and behind the engine, downstream of the catalytic converter

Check for EGR and differential pressure sensor fault codes that prevent regeneration.
Verify the car's primary use is not exclusively short urban trips.
Request any DPF cleaning or replacement receipts.
If a workshop inspection is possible: Read DPF soot loading via OBD diagnostics — values above 80% confirm severe blockage.
A compression test should also be done if EGR or injector codes are present.

Parts involved: Diesel particulate filter.

What it costs to put right

$2,000 to $4,500 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

“Is the car mainly used on short local trips or regular motorway runs?”
“Has the DPF warning light been on at any point?”
“Has the DPF been professionally cleaned or replaced?”

Now check the Audi A5 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 A5 buyer questions

Is 2.0 tdi dpf premature clogging serious on a Audi A5?

We rate it major and common on the Audi A5. The A5 8T fitted with the 2.0 TDI (CAHA) shares the same DPF regeneration vulnerability as other VAG 2.0 TDI applications. Passive and active DPF regeneration requires sustained exhaust temperatures not achievable on urban or short-trip duty cycles. Repeated cold starts and stop-start urban use progressively block the filter beyond the point of self-cleaning. Compounding faults including EGR valve failure, injector wear, or a defective differential pressure sensor prevent the ECU from triggering regeneration even when motorway conditions are met, accelerating DPF failure.

How much does it cost to fix on a Audi A5?

$2,000 to $4,500 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 A5 years are affected?

Our research records this fault on the 2007–2016 Audi A5. 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?

Check for EGR and differential pressure sensor fault codes that prevent regeneration. Verify the car's primary use is not exclusively short urban trips. Request any DPF cleaning or replacement receipts. If a workshop inspection is possible: Read DPF soot loading via OBD diagnostics — values above 80% confirm severe blockage. A compression test should also be done if EGR or injector codes are present. Look here: Exhaust system below and behind the engine, downstream of the catalytic converter