Review on High-Quality 11727553056 Secondary Air Injection Pump for B-M-W E46 323i 323ci 325i 325ci 328i 328ci 330i 330xi 1999-2005 - AKWH by Ronald Bleimeyer
No exhaust and emission filters
Product appears to work but did not come with a filter under the top cap like the OEM air pumps. run. Conspicuously noisy, but that suits me as it seems to do the job.
- The secondary air injection pump (also called the smog pump or SAI pump) is responsible for reducing the amount of carbon emissions emitted through the vehicle's tailpipe. This is necessary because the vehicle engine never achieves 100% efficiency in the combustion process.
- Expensive
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