The BMW 840Ci Fuel Injector O-Ring prevents leakage by creating a seal that keeps pressurized fuel exactly where it belongs for power and safety. Renowned in the BMW performance community, this small but strong Fuel Injector O-Ring is fitted between the injector and rail. This Fuel Injector O-Ring holds the pressure so that every pulse of fuel hits the chamber exactly when the control module asks. All 840Ci drivers, whether of the acclaimed E31 or of the recent revived 840Ci grand tourer, can rely on the same Fuel Injector O-Ring design because the heat resistant rubber compound applied for them will resist swelling and cracking whether there is classic port injection or a newer high pressure system. The Fuel Injector O-Ring is twin-designed, top and bottom, to cushion vibration while sealing to prevent fire. The result is smoother idling, sharper throttle response, and fewer evaporative losses that hurt mileage. Because genuine BMW materials are not attacked by ethanol blends as lesser seals are, the 840Ci owner can confidently push the car on long highway cruises or spirited back-road runs. It is a simple job that takes only a few minutes to replace a worn-out Fuel Injector O-Ring. This will restore the carefully managed fuel trim that allows catalytic converters to live a long and happy life while keeping emissions in check. Installing this is an easy upgrade that enhances the 840Ci's refined character. Each Fuel Injector O-Ring is dimensioned to factory spec so it slips onto every original or updated injector body without forcing or tearing. This guarantees a repeatable fit on all production years of the 840Ci coupe. Regular inspection of the Fuel Injector O-Ring during oil changes will show signs of age hardening and ultimately save the BMW owner costly fuel rail repairs while maintaining that 840Ci smoothness. The Fuel Injector O-Ring is a reliable choice in the automotive market. It has proven durability, perfect compatibility, a factory backed BMW warranty, and is engineered with confidence by the specialists at BMW.
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