Description
Product Overview
The A-Premium Air Pump Check Valve is a precision‑engineered component designed to meet the exacting standards of BMW secondary air injection systems. Constructed from high‑grade aluminum, the valve provides excellent corrosion resistance and lightweight durability. It matches the OEM part numbers 911‑979 and 911979, ensuring a seamless, direct‑fit installation without the need for modifications. Dimensions of 4.13 x 3.94 x 3.15 inches and a weight of 9.5 ounces make it easy to handle while delivering robust performance. This valve regulates airflow to the exhaust, promoting complete combustion and helping to keep emissions within legal limits.
Usage
Ideal for BMW E46, E90, and E91 series models ranging from 2003 to 2006, the valve fits 2.5L and 3.0L engines (M54 code). It is perfect for owners seeking to replace a failed check valve, mechanics performing routine maintenance, or performance enthusiasts aiming to maintain optimal exhaust flow. Installation requires only basic hand tools and can be completed in minutes, making it suitable for both professional garages and DIY garages. 
Why Choose Us
A-Premium stands behind every product with a one‑year unlimited‑mileage guarantee, reflecting confidence in material quality and manufacturing precision. Each valve is produced to OEM design tolerances, guaranteeing a factory‑fresh appearance and exact fit. Our rigorous quality control includes dimensional verification, leak testing, and corrosion resistance checks. By choosing this valve, you benefit from reduced risk of check‑engine lights, lower exhaust emissions, and sustained engine performance.
Key Features
- Direct‑fit aluminum construction matching OEM specifications for BMW models.
- Corrosion‑resistant material ensures long‑term durability in harsh engine environments.
- Easy installation with no special tools required, saving time and labor costs.
- Improves combustion efficiency by injecting fresh air into the exhaust stream.
- Backed by a one‑year unlimited‑mileage warranty for peace of mind.
FAQ
What vehicles are compatible with this check valve?
The valve fits BMW E46 325Ci, 325i, 325xi (2003‑2006) with the M54 2.5L engine, as well as E90/E91 325xi (2006) 3.0L models and 330Ci (2003‑2006) 3.0L engines.
Do I need special tools to install the valve?
No special tools are required. The valve is designed for a direct‑fit installation using standard hand tools such as a socket set and screwdrivers.
Will this valve help reduce my vehicle’s emissions?
Yes. By ensuring proper air flow into the exhaust, the valve promotes complete fuel combustion, which can lower unburned fuel emissions and help keep the check‑engine light off.
Is the aluminum material safe for high‑temperature engine environments?
Aluminum used in this valve is specifically selected for its high temperature tolerance and resistance to corrosion, making it suitable for the demanding conditions of the exhaust system.
What warranty does A-Premium provide?
A-Premium offers a one‑year unlimited‑mileage warranty that covers any defects in material or workmanship, giving you confidence in the product’s reliability.
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