Parts for your 2022 Subaru Impreza-Fuel pump

2022 Subaru Impreza Fuel Pump: What it does and when to service it

Referencing Subaru’s service information for the FB20D boxer engine and the official Subaru parts catalogue for MY2022 Impreza, this model absolutely uses fuel pumps: an in-tank electric fuel pump module (low pressure) and an engine-mounted mechanical high-pressure fuel pump for its direct-injection system. So yes—the fuel pump is relevant on a 2022 Subaru Impreza.

On the 2022 Impreza, the fuel pump setup pulls petrol from the tank, sends it forward at low pressure, then the high-pressure pump boosts it for the direct-injection rails and injectors. That two-stage arrangement keeps the engine starting crisply, idling smoothly, and pulling cleanly through the rev range while maintaining emissions and fuel economy. If either pump can’t maintain target pressure, drivers may notice long cranking, hesitation on hills, loss of power, or the odd misfire under load.

There’s no scheduled replacement interval for the fuel pump on this model, and the primary filter/strainer is integrated into the in-tank module. Routine servicing focuses on checks and prevention: confirming quiet pump operation at key-on, scanning for fuel-pressure or mixture codes, and making sure there’s no contamination in the tank. Keeping at least a quarter tank helps keep the in-tank pump cool and happy, especially in hot Aussie and Kiwi summers.

If replacement is needed, best practice is to diagnose first: verify supply voltage, check low- and high-side pressures against spec, and rule out clogged lines or a restricted tank vent. When fitting a new in-tank module, always install a fresh tank seal/O-ring and keep the work area spotless to avoid introducing debris. For the engine-mounted high-pressure pump, relieve fuel pressure properly, use new sealing washers where specified, and follow torque procedures from Subaru service documentation.

Common signs a pump is on the way out include longer cranking, surging at motorway speeds, a loud whine from the tank area, or lean fault codes. If any of these show up, it’s worth a proper pressure test rather than guessing. Genuine or OE-quality parts are recommended—DI systems are picky about consistent fuel delivery.

• Listen for the brief prime noise at key-on—silence can indicate an issue.
• Avoid running the tank near empty to reduce heat and contamination risk.
• After any suspected bad fuel, consider a tank drain and fresh fill.

Popular questions about 2022 Subaru Impreza fuel pumps

Does the 2022 Impreza have one pump or two?
It has both: an in-tank electric low-pressure pump and an engine-mounted high-pressure pump for the direct-injection system. This is confirmed by Subaru service manuals and the parts catalogue for the FB20D engine.

When should the fuel pump be replaced?
There’s no set kilometre interval. Replace only when diagnostics show poor pressure/volume, excessive noise, or contamination. Symptoms often include long cranking, hesitation under load, or relevant fault codes.

How much might a replacement cost in AU/NZ?
Ballpark only: an in-tank module can run a few hundred to around a thousand AUD/NZD parts-dependent, plus 1.5–3.0 hours labour. The high-pressure pump is typically higher in parts cost. Actual pricing varies by brand, region, and workshop.