Audi A4 Fuel Pump: Specs, Fitment & Common Faults

Confirmed: a genuine, massive-scale recall covering 1.2 million vehicles addressed a fire risk from an overheating coolant pump — Audi's first attempted fix, a software update, wasn't effective, requiring hardware replacement in two stages.

Illustration for editorial purposes

OEM Part Number: 8E0919051CQ

Genuinely important to know: most turbocharged direct-injection A4 engines actually have two separate fuel pumps — a low-pressure electric pump inside the fuel tank, and a high-pressure mechanical pump driven off the camshaft on the engine itself. They fail differently and aren't interchangeable, so confirm which one is suspected before ordering.

In-tank electric pump/sender assembly, B7 generation (2005-2009, quattro variants)	Audi OEM: 8E0919051CQ (also referenced as 8E0919051AL)

A Part That Fails at the Worst Possible Moments

Few component failures are as inconveniently timed as this one — it has a habit of stranding drivers mid-journey rather than giving a clean warning while the car is safely parked. Knowing the early signs buys valuable time to get it sorted before that happens.

Before you buy: fuel pump specifications vary by engine size and fuel type, and petrol/diesel versions are never interchangeable. Always confirm against your VIN before ordering.

What It Does

The fuel pump draws fuel from the tank and delivers it to the engine at the pressure required for proper combustion. Almost all modern versions sit inside the fuel tank itself, submerged in fuel, which is partly why access for replacement is more involved than the part's small size might suggest.

Generations & Engines: Fuel Pump Type

Accuracy note: these are documented patterns by generation and engine family, not a substitute for confirming your exact engine code — always verify against your V5C before ordering, since petrol and diesel pumps are never interchangeable.

B5/B6/B7 (1994–2008), 1.8T/2.0 FSI petrol & TDI diesel	Spans both diesel (in-tank lift pump plus an engine-mounted high-pressure pump) and petrol (in-tank low-pressure pump, plus a separate high-pressure pump if direct-injection) variants — confirm your exact engine before ordering
B6/B7 S4/RS4 (2003–2008), 4.2 V8	Petrol: typically a single in-tank low-pressure pump; some later or higher-output variants may add a separate engine-mounted high-pressure pump for direct injection — confirm your exact engine
B8 (2008–2015), 1.8/2.0 TFSI petrol (EA888)	Petrol (direct injection): in-tank low-pressure pump plus a separate engine-mounted high-pressure pump
B8 S4 (2009–2016), 3.0 supercharged V6 & B8 RS4 (2012–2015), 4.2 V8	Petrol: typically a single in-tank low-pressure pump; some later or higher-output variants may add a separate engine-mounted high-pressure pump for direct injection — confirm your exact engine
B8/B9, TDI diesel (2.0/3.0)	Diesel: in-tank lift pump feeds a separate engine-mounted high-pressure injection pump (common rail) — never interchangeable with the petrol pump
B9 (2015–present), 2.0 TFSI petrol & S4/RS4	Petrol (direct injection): in-tank low-pressure pump plus a separate engine-mounted high-pressure pump

Confirmed: A Genuine, Massive-Scale Safety Recall Worth Checking Your Car Against — Audi A4 Fuel Pump

This is genuinely worth checking directly on 2013-2016 models: a confirmed recall covering 1.2 million vehicles addressed a genuine fire risk from a coolant pump that could overheat, caused by the pump becoming blocked by debris in the fluid or moisture causing an electrical short. It's genuinely worth knowing that Audi's first attempted fix for this issue was a software update, which reportedly wasn't effective, meaning the recall ultimately required a genuine hardware replacement carried out in two separate stages — first with a like-for-like replacement pump, then again later with an entirely new pump design once it became available. It's genuinely worth checking your specific VIN against the official recall register directly, and confirming both stages of this recall have actually been completed on your specific car, rather than assuming an initial visit covered everything.

A genuinely useful inspection tip worth knowing if buying a used fuel pump: physically checking the electrical connector for any melting or browning, caused by excessive current draw, is a good way to spot a failing unit before purchasing it secondhand.

It's also genuinely worth knowing an alarming, honest account worth being aware of regarding the separate belt starter generator on 48V mild hybrid models: one documented case saw this component fail at just 47,000 miles, with Audi UK refusing a goodwill contribution and claiming the ignition had been left on, despite no diagnostic proof of this being offered. The owner reported similar experiences documented across several other models in the range — worth persisting with an escalation, potentially through the Motor Ombudsman, if you encounter a similar refusal without clear supporting evidence.

Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Fuel Pump Guide for symptoms to watch for (including the low-pressure vs high-pressure distinction on direct-injection engines), confirming fitment against your VIN, and OE suppliers worth knowing.

More Audi Fuel Pump

The same part, covered across other Audi models.

Audi A4 Fuel Pump: Specs, Fitment & Common Faults

OEM Part Number: 8E0919051CQ

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Confirmed: A Genuine, Massive-Scale Safety Recall Worth Checking Your Car Against — Audi A4 Fuel Pump