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.

Illustration for editorial purposes

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Mazda CX-3 Fuel Pump: OEM Part Number

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.

Mazda CX-3 Fuel Pump: A Part That Fails at the Worst Possible Moments

This is one of the more inconveniently timed failures the Mazda CX-3 can have — it tends to strand drivers mid-journey rather than politely failing while the car's parked on the drive. Recognising the early warning signs buys real time to sort it before you're stuck somewhere inconvenient.

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.

Mazda CX-3 Fuel Pump: What It Does

Delivering fuel from the tank to the engine at the correct pressure for combustion is the Mazda CX-3's fuel pump's whole job. It lives inside the tank itself, submerged in fuel, which is exactly why replacing something this small is a more involved job than it looks.

Mazda CX-3 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.

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

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Mazda CX-3 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 Mazda Fuel Pump

The same part, covered across other Mazda models.