BMW Air Pump Check Valve - Genuine BMW 11727837096

Product Information

The secondary air injection pump check valve helps reduce emissions by injecting extra air into the exhaust stream during cold starts. This additional air aids in burning any unburned fuel and reduces harmful emissions, particularly carbon monoxide and hydrocarbons, before the catalytic converter reaches operating temperature. The check valve is responsible for directing air into the exhaust and preventing exhaust gases from flowing back into the air injection pump.

• Check Engine Light: A common sign of a faulty check valve is the check engine light illuminating. The ECU will detect issues with the air injection system and log related error codes, such as P0410 or P0411
• Poor Engine Performance: When the check valve fails, you may experience rough idling, hesitation, or reduced acceleration, as the secondary air injection system plays a role in optimizing cold starts and early engine efficiency
• Increased Emissions: A failed check valve can lead to a rise in emissions due to unburned fuel in the exhaust. This issue might only be noticeable during an emissions test, but if left unresolved, it can impact the catalytic converter over time.

About Genuine BMW

The original parts used by BMW to build your car are available as replacement parts under the “Genuine BMW” brand. When ordering a Genuine BMW part you are guaranteed to get the same part that you would pick up from your local dealerships part department. Genuine BMW parts have been built to BMW’s stringent standards and are the same quality of the original parts used to build your Ultimate Driving Machine.

You may not realize this, but the parts that make up your BMW are not necessarily manufactured by BMW. No cause for concern, as BMW designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for BMW for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine BMW parts box and find an OEM branded part inside, simply with the addition of a BMW logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.