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Where is the fuel pump relay located on the BYD F3?

2 Answers

StCooper

08/27/25 3:56am

BYD F3 fuel pump relay is located on the wiring harness assembly. The wiring harness assembly is positioned below the steering wheel, behind a small storage compartment on the left side. The wiring harness assembly contains the following components in sequence: fuel pump relay, power window relay, vacant slot, rear defroster relay, ignition relay, and flasher relay mounting bracket. The BYD F3 is positioned as a compact car, equipped with a 1.5L inline 4-cylinder naturally aspirated engine across all variants, paired with either a 5-speed manual or 6-speed dual-clutch transmission. It delivers maximum power of 80KW (109PS) and maximum torque of 145NM. In terms of suspension, the BYD F3 features MacPherson strut independent front suspension and torsion beam non-independent rear suspension.

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AutumnAnn

09/09/25 3:01am

I remember my BYD F3 once failed to start, and it turned out to be an issue with the fuel pump relay. Its location is inside the fuse box in the engine compartment. That small box is usually on the left side near the battery. Lift the cover, and you'll see a row of various relays. The one for the fuel pump is generally square with a label, marked 'FUEL PUMP' or something similar. For safety, always disconnect the negative terminal of the battery before inspection to avoid the risk of electric shock. If you hear the fuel pump buzzing but it's not working while driving, the relay might be the culprit. Replacing it with a brand new one is a simple fix and saves you a trip to the repair shop. I recommend opening the box to clean out dust every six months to prevent poor contact that could lead to unexpected stalling. A friend's car had issues on the highway once because the relay was corroded.

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