CriticalCommonEngine

Audi A4: CAEB/CDNB 2.0 TFSI Timing Chain Tensioner Failure

CAEB/CDNB 2.0 TFSI Timing Chain Tensioner Failure is a common engine fault on the Audi A4 on the 2008–2015 cars, and we rate it critical. Putting it right costs $2,200 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 45 documented faults on the Audi A4.

Vehicle: Audi A4
Engine: 2.0L
Years: 2008–2015
Fuel: petrol
System: Engine

This page covers the Audi A4 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 A4 faults45 documented faults on this model

What you are looking at

What goes wrong

The CAEB and CDNB 2.0 TFSI EA888 Gen 2 engines use a hydraulic timing chain tensioner that relies on residual oil pressure to maintain chain tension after shutdown. When oil drains back overnight, the tensioner loses hydraulic preload, allowing the chain to slacken. On cold start the chain rattles until oil pressure rebuilds, typically within 2-10 seconds. Over time the plastic tensioner body fatigues, the internal check-valve weakens, and the spring loses rate. Progressive slack allows the chain to ride over the tensioner guide rail, wear the rail, and eventually jump a tooth or snap entirely, causing catastrophic piston-to-valve contact and bent valves requiring complete engine rebuild.

What you would notice

Metallic rattling from engine front on cold start lasting 2-10 seconds
Check engine light with camshaft position correlation codes P0016/P0017
Rough idle or misfires immediately after cold start
Oil pressure warning light at startup on worn units
Sudden loss of power if chain jumps a tooth

How to check it

Where to look. Front of engine block, timing chain cover on the longitudinal TFSI layout, accessible from above with intake removed

Cold-start the engine from fully cold and listen immediately at the front of the engine for chain rattle.
Duration beyond 3 seconds is a red flag.
Scan VCDS for stored codes P0016, P0017, P0011, P0341.
Check engine oil level, condition, and service interval compliance — extended intervals accelerate tensioner wear.
Ask specifically if the tensioner or chain has been replaced.

Parts involved: Timing chain.

What it costs to put right

$2,200 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

“Has the timing chain or tensioner ever been inspected or replaced?”
“Does the engine make any rattling noise on cold start?”
“What oil change interval has been followed and what oil grade?”

Now check the Audi A4 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 A4 buyer questions

Is caeb/cdnb 2.0 tfsi timing chain tensioner failure serious on a Audi A4?

We rate it critical and common on the Audi A4. The CAEB and CDNB 2.0 TFSI EA888 Gen 2 engines use a hydraulic timing chain tensioner that relies on residual oil pressure to maintain chain tension after shutdown. When oil drains back overnight, the tensioner loses hydraulic preload, allowing the chain to slacken. On cold start the chain rattles until oil pressure rebuilds, typically within 2-10 seconds. Over time the plastic tensioner body fatigues, the internal check-valve weakens, and the spring loses rate. Progressive slack allows the chain to ride over the tensioner guide rail, wear the rail, and eventually jump a tooth or snap entirely, causing catastrophic piston-to-valve contact and bent valves requiring complete engine rebuild.

How much does it cost to fix on a Audi A4?

$2,200 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 A4 years are affected?

Our research records this fault on the 2008–2015 Audi A4. 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?

Cold-start the engine from fully cold and listen immediately at the front of the engine for chain rattle. Duration beyond 3 seconds is a red flag. Scan VCDS for stored codes P0016, P0017, P0011, P0341. Check engine oil level, condition, and service interval compliance — extended intervals accelerate tensioner wear. Ask specifically if the tensioner or chain has been replaced. Look here: Front of engine block, timing chain cover on the longitudinal TFSI layout, accessible from above with intake removed