Peugeot 508 Fuel Pump: Specs, Fitment & Common Faults

On the 508, a genuine ombudsman-won case confirms a known internal pump design flaw — plus a real cost-saving tip worth knowing before paying a dealer's parts price.

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Peugeot 508 Fuel Pump: OEM Part Number

Accuracy note: genuinely worth knowing: high-mileage 508s often show early fuel pump wear as intermittent problems — starting fine most days but occasionally cranking longer than usual — rather than a sudden, total failure, which can make the root cause easy to misdiagnose as something else.

A Genuine, Documented Consumer Win Worth Knowing About — Peugeot 508 Fuel Pump

If your high-pressure fuel pump fails and a dealer initially blames non-Peugeot servicing or the wrong oil, this is genuinely worth knowing: one owner took exactly this dispute to the ombudsman and won after a two-month fight, with the ruling confirming the fault was a known internal design issue — a non-return valve inside the pump failing and allowing high-pressure fuel to flow backward into the low-pressure side — rather than anything caused by aftermarket servicing. It's also worth knowing your genuine legal position here: a manufacturer cannot lawfully require you to have your car serviced exclusively by their own dealer network to keep the warranty valid, provided servicing is carried out to the correct specification using appropriate parts. If you're facing a similar dismissal, this is worth raising directly rather than accepting it as the final word.

A genuinely significant cost-saving tip worth knowing: the high-pressure fuel pump fitted to several Peugeot petrol engines is a shared, common component also used by other manufacturers — one documented case found the identical part available from a BMW dealer for around £230, compared with Peugeot's own quote of over £750 (part plus labour) for the exact same physical component. It's genuinely worth asking a specialist whether your specific pump has a cross-brand equivalent before accepting a dealer's own parts price at face value.

Worth knowing if you're on a second or third replacement pump that's failed quickly each time: this can point to an underlying contamination issue in the fuel system rather than simply unlucky parts — insisting on a full fuel system check, not just another pump swap, is worth doing if a replacement fails again within a short time.

Peugeot 508 Fuel Pump: A Part That Fails at the Worst Possible Moments

On the Peugeot 508, this particular failure has a knack for terrible timing, stranding drivers mid-journey instead of giving fair warning while the car's parked up safely. Spotting the early signs early enough is what stands between a routine fix and a roadside breakdown.

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.

Peugeot 508 Fuel Pump: What It Does

Getting fuel from tank to engine at the correct combustion pressure is down to the fuel pump, and on the Peugeot 508 that pump sits inside the tank, submerged in fuel. That location is exactly why swapping out such a small part is rarely a quick job.

Peugeot 508 Fuel Pump: 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.

Mk1 (2010–2018), 1.6 HDi diesel	Diesel: in-tank lift pump feeds a separate engine-mounted high-pressure injection pump (common rail) — never interchangeable with the petrol pump
Mk1, 1.6 THP petrol	Petrol (direct injection): in-tank low-pressure pump plus a separate engine-mounted high-pressure pump
Mk2 (2018–present), 1.6 PureTech petrol	Petrol (direct injection): in-tank low-pressure pump plus a separate engine-mounted high-pressure pump

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Peugeot 508 Fuel Pump: 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 Peugeot Fuel Pump

The same part, covered across other Peugeot models.