Audi A3: CAGA/CJCA 2.0 TDI Cam Follower and HPFP Lobe Wear

The CAGA and CJCA common-rail 2.0 TDI engines fitted to the A3 8P from approximately 2008 share the same high-pressure fuel pump cam follower failure mode as the contemporary A4 B8. The steel cam follower transmitting the camshaft pump-drive lobe motion to the HPFP piston relies on oil splash lubrication, which is insufficient for the load imposed. The case-hardened follower surface wears through progressively, then destroys the camshaft lobe itself. Follower fragments entering the oil circuit and fuel system cause catastrophic secondary damage. Prompt engine shutdown is essential the moment low fuel pressure symptoms appear. Total repair costs can approach or exceed the vehicle's value if the camshaft, oil pump, and fuel system require replacement.

• Difficulty starting, particularly when engine is hot
• Engine stalling under acceleration or at junctions
• Fault code P0087 for low fuel rail pressure
• Abnormal tapping noise from cylinder head at HPFP location
• Visible metal contamination in engine oil

Check service records for documented cam follower inspections every 10,000-20,000 km on CAGA/CJCA engines. If no inspection records exist, this must be done immediately before purchase. Scan for P0087 and any related camshaft or fuel pressure fault codes. If a workshop inspection is possible: Remove the HPFP to physically measure follower height — under 6 mm is critical failure territory.

Parts involved: High-pressure fuel pump.

$1,800 to $7,500 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.

• “Is there a recorded history of cam follower checks at each service?”
• “Has the high-pressure fuel pump ever been removed or replaced?”
• “Any history of hard starting, stalling, or no-start events?”

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.