Parts for your 2010 Subaru Impreza-Fuel pump

2010 Subaru Impreza fuel pump — what it does and when to service or replace it

According to Subaru’s Factory Service Manual for the 2010 Impreza (Fuel Injection/Fuel Delivery sections) and the Subaru parts catalogue for GH/G3 chassis cars, every 2010 Subaru Impreza petrol variant is equipped with an in-tank electric fuel-pump module. WRX and STI versions use higher-flow specifications, but the location and core function remain the same.

The fuel-pump’s job is simple but critical: draw petrol from the tank, push it through the in-tank filter/strainer, and maintain the correct pressure so the injectors can deliver the right amount of fuel. On key-on, the pump primes briefly, once running, it keeps rail pressure steady across revs and load. The module typically combines the pump motor, pressure regulator, level sender and strainer in one assembly, which is why Subaru doesn’t list a routine external fuel-filter change on these models.

While there’s no set replacement interval, a tired pump can show up as hard starting, flat spots under acceleration, surging, or a loud whine from the tank. A smell of fuel, long crank times, or a sudden stall under load also point to fuel delivery issues worth checking with a pressure test.

• Access and fitment: The pump is inside the tank under the rear seat with a service cover. Battery off, relieve fuel pressure, then lift the seat base to get at the cover and locking ring. Always replace the sealing O-ring and check for leaks after reassembly.
• Turbo vs non‑turbo: WRX/STI need a pump that meets higher flow/pressure. Choose genuine or a reputable aftermarket unit that states the correct spec for the exact variant.
• Good habits: Keep at least a quarter tank to help cool and lubricate the pump. Use quality fuel from trusted servos, contaminated petrol is a fast way to clog a strainer and overwork the pump. E10 is commonly supported on many Aussie/Kiwi petrol Imprezas, but E85 isn’t approved unless the car’s been purpose‑modified.
• Service pointers: If chasing intermittent hesitation, inspect the in-tank strainer and electrical connector, and verify voltage supply. Consider replacing the in-tank filter canister when renewing a high‑km original pump.

Done right, a quality pump can last well past 150,000 km. If symptoms crop up, sort it promptly—restoring correct fuel pressure protects the engine and brings back the crisp throttle response Imprezas are known for.

Where is the fuel pump on a 2010 Subaru Impreza?

It sits inside the fuel tank as part of a sealed module, accessed under the rear seat through a service cover. This applies to naturally aspirated, WRX and STI variants of the 2010 model year.

With the battery disconnected and fuel pressure relieved, the seat base lifts out to reveal the cover. From there, the locking ring can be removed to lift out the module for inspection or replacement.

How long does a 2010 Impreza fuel pump last?

Many original pumps run well beyond 150,000 km, but lifespan depends on fuel quality, heat, and running the tank low. There’s no scheduled interval—replace on condition.

If there’s whining from the tank, hard starting, hesitation, or power loss under load, get a fuel pressure test. Catching a weak pump early can prevent lean running and engine stress.

What does replacement typically cost?

Parts can range from a strainer/pump insert around the mid-hundreds to a complete module at the higher end, with labour commonly 1–2 hours. WRX/STI high‑flow units tend to cost more.

Prices vary by brand and region in Australia and New Zealand, so it’s worth quoting both genuine and reputable aftermarket options that meet the exact flow/pressure spec for the variant.