The BOSCH Injector Seal Ring, part number 2 430 105 020, is a critical component for maintaining the integrity of your fuel injection system. Designed to precise specifications, this seal ring creates a tight barrier between the fuel injector and the engine intake manifold. This prevents unintended air leaks into the combustion chamber and, more importantly, stops fuel from escaping the system. A compromised seal can lead to a variety of issues, including rough idling, reduced engine performance, increased fuel consumption, and potential safety hazards due to fuel vapor. By using a high-quality seal ring from BOSCH, you can be confident in its durability and effectiveness, ensuring optimal engine operation and fuel efficiency.