Fuel Delivery: Notes

Before any service work is performed on any fuel system related component, always adhere to the following:

• Observe relevant safety legislation pertaining to your area.
• Ensure adequate ventilation.
• Use exhaust extraction system where applicable (alleviate fumes).
• Do not operate the fuel pump unless it is properly installed in the fuel tank and is submersed in the fuel (fuel lubricates the pump).
• Always wear adequate protection clothing including eye protection.
• Use caution when working around a hot engine compartment.
• During fuel system repair that involves "sealing rings" always replace them with new copper rings only.
• BMW does not recommend any unauthorized modifications to the fuel system. The fuel system is designed to comply with strict federal safety and emissions regulations.
• Fuel quality should always be considered when diagnosing a driveability complaint. The type of fuel, proper AKI rating, impurities and moisture are not factored by the ECM.