Parts for your 2006 Toyota Bb-Fuel pump

2006 Toyota bB Fuel Pump — what it does and when to service it

A fuel pump is absolutely fitted to the 2006 Toyota bB. Technical references including the Toyota Electronic Parts Catalogue for the QNC20/QNC21/QNC25 series list a “fuel suction with pump assembly” (commonly under part family 77020‑xxxxx), and the Toyota repair manual for the K3‑VE and 3SZ‑VE engines details an in‑tank, electric pump integrated with the fuel level sender and strainer. That setup is typical of Toyota’s returnless, EFI fuel systems from this era.

On the bB, the pump’s job is to deliver a steady supply of petrol at the correct pressure to the injector rail—roughly in the 3.0 bar range—so the engine starts quickly, idles smoothly, and pulls cleanly up hills and motorways. The module usually includes a built‑in regulator and a fine strainer, and it’s cooled and lubricated by the fuel in the tank.

There’s no scheduled replacement interval for the pump. Toyota treats the internal filter/strainer as part of the module, so it’s typically renewed only if pressure tests fail or symptoms appear. Good habits help: keep at least a quarter‑tank of fuel (the pump runs cooler), use reputable fuel, and avoid running the tank dry.

Signs it’s time to test or replace the pump include:

• Hard starting, long crank or intermittent stalling
• Loss of power under load or on steep climbs
• Whining from the tank area
• Lean mixture faults (e.g., P0171) or low fuel‑pressure readings

Replacement on the 2006 bB is via the access panel under the rear seat. Standard steps are to depower the system (battery negative off), relieve residual pressure, lift the access cover, disconnect the lines and plug, then remove the locking ring and lift out the module. Always renew the tank seal/O‑ring, keep the area spotless to prevent contamination, and torque the ring to spec. Use a quality genuine or OE‑grade module