Mazda CX-3 Fuel Pump: Specs, Fitment & Common Faults

On the CX-3, a genuine, serious UK safety recall (R/2021/435) covers a fuel pump impeller that can crack and cause stalling.

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OEM Part Numbers

Accuracy note: genuinely worth knowing: most turbocharged direct-injection CX-3 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.

Confirmed: A Genuine, Serious UK Safety Recall Worth Checking Your VIN Against — Mazda CX-3 Fuel Pump

This is genuinely worth checking directly against your specific car: Mazda issued a UK safety recall (reference R/2021/435) covering models manufactured between October 2017 and September 2019, for a genuine fault in the low-pressure fuel pump manufactured by Denso — the plastic impeller inside can crack and deform, potentially causing the pump to fail and the engine to stall while driving or fail to start. Around 27,000 UK-registered vehicles were covered, with the fix being a full replacement pump fitted free of charge.

A genuinely useful, real diagnostic point worth knowing: a pre-failure pump can produce intermittent stalling that a basic roadside pressure test doesn't catch — one documented case saw a breakdown recovery service find no fault via pressure testing, despite the car repeatedly cutting out, with the recall replacement ultimately resolving it completely.

It's also genuinely worth knowing that dealers commonly ask that the fuel tank be no more than a quarter full before the appointment, and that some documented cases saw a noticeable amount of fuel go missing during the process. An evaporative emissions fault code appearing shortly after this specific recall work has also been documented in some cases.

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.

2015–present, SkyActiv-G petrol & SkyActiv-D 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

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 Mazda Fuel Pump

The same part, covered across other Mazda models.

Mazda CX-3 Fuel Pump: Specs, Fitment & Common Faults

OEM Part Numbers

Confirmed: A Genuine, Serious UK Safety Recall Worth Checking Your VIN Against — Mazda CX-3 Fuel Pump

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