The MAHLE Fuel Injection Nozzle O-Ring Kit (also sold as a fuel injector O-ring kit or fuel injector seal kit) provides the seals that keep fuel injectors tightly sealed in the engine. Fresh O-rings help prevent fuel leaks and air intake at the injector, and they support steady fuel delivery when injectors are removed or replaced. Key Features: OE-level quality: MAHLE states that its gaskets meet or exceed original equipment specifications. OE-equivalent or better materials: Built to hold up against fuel and engine heat. Direct-fit replacement: Designed as a like-for-like replacement for the original injector seals. Secure packaging: MAHLE Original gasket products are packed in a shrink-wrapped tray so you can check the contents before opening. MAHLE is a long-established OE supplier, and its aftermarket gaskets and seals are trusted by technicians. Replacing the injector O-rings during fuel system service helps restore a reliable seal and protects against leaks.