Blanking plug used to delete the annoying, and commonly faulty Secondary Air Pump (SAP) on the M52Tu / M54 engines.
Fits: BMW 320i/323i/325i/328i/330i (1998 – 2006) BMW 520i/523i/525i/528i/530i (1995 – 2004) and other M52Tu / M54 equipped cars.