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Volkswagen Transporter: T5 2.5 TDI (AXD/AXE/BNZ/BPC) — camshaft wear and oil pump hex-drive failure

T5 2.5 TDI (AXD/AXE/BNZ/BPC) — camshaft wear and oil pump hex-drive failure is a common engine fault on the Volkswagen Transporter on the 2004–2009 cars, and we rate it critical. Putting it right costs $1,500 to $8,000 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 18 documented faults on the Volkswagen Transporter.

Vehicle
Volkswagen Transporter
Engine
2.5L
Years
2004–2009
Fuel
diesel
System
Engine

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

All Volkswagen Transporter faults18 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 T5's 2.5 five-cylinder is infamous for two engine-killers: soft camshafts/lifters that wear prematurely (tappet rattle, misfire, low power), and the balance-shaft/oil-pump hexagonal drive shaft rounding off — which instantly drops oil pressure and destroys the engine if the driver ignores the light. Preventive fixes (upgraded hex shaft, cam replacement) are well documented; an engine with no history of them is a gamble.

What you would notice

  • Tappet/top-end rattle when warm
  • Oil pressure light flicker — stop immediately
  • Misfire or lack of power
  • Metal glitter in drained oil

How to check it

Where to look. Camshafts under the cam cover; oil pump drive low in the sump area

  1. Listen to the warm engine at idle for top-end tapping.

  2. Ask specifically: has the oil pump hex drive been upgraded, and have the cams ever been replaced?

  3. Invoices for either add real value.

  4. Check oil light goes out instantly on start.

What it costs to put right

$1,500 to $8,000 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 oil pump hex drive shaft been upgraded?”
  • “Have the camshafts/lifters been replaced?”
  • “Any oil pressure warnings ever?”

Now check the Volkswagen Transporter 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.

  • VW T4/T5 Forum 2.5 TDI hex shaft failure megathreads
  • VWWatercooled T5 2.5 TDI camshaft wear threads
  • UK T5 buying guides (T6Forum/Transporter HQ) citing AXD/BNZ cam and hex drive

Volkswagen Transporter buyer questions

Is t5 2.5 tdi (axd/axe/bnz/bpc) — camshaft wear and oil pump hex-drive failure serious on a Volkswagen Transporter?

We rate it critical and common on the Volkswagen Transporter. The T5's 2.5 five-cylinder is infamous for two engine-killers: soft camshafts/lifters that wear prematurely (tappet rattle, misfire, low power), and the balance-shaft/oil-pump hexagonal drive shaft rounding off — which instantly drops oil pressure and destroys the engine if the driver ignores the light. Preventive fixes (upgraded hex shaft, cam replacement) are well documented; an engine with no history of them is a gamble.

How much does it cost to fix on a Volkswagen Transporter?

$1,500 to $8,000 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 Volkswagen Transporter years are affected?

Our research records this fault on the 2004–2009 Volkswagen Transporter. 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?

Listen to the warm engine at idle for top-end tapping. Ask specifically: has the oil pump hex drive been upgraded, and have the cams ever been replaced? Invoices for either add real value. Check oil light goes out instantly on start. Look here: Camshafts under the cam cover; oil pump drive low in the sump area