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Search our online knock sensor catalog and find the lowest priced discount auto parts on the web. We sell wholesale to the public. We offer high quality new, OEM, aftermarket and remanufactured Audi A4 Knock Sensor parts. We specialize in a wide-variety of high-quality car parts and accessories for your car, truck or SUV. Call toll free to order or place your order online via our secure checkout system. Our online parts catalog uses real-time inventory, so you can be assured the parts you buy are in stock at the time of ordering. Most orders are shipped the same day. They are available for the following Audi A4 years: 08, 07, 06, 05, 04, 03, 02, 01, 00, 99, 98, 97, 96, 2008, 2007, 2006, 2005, 2004, 2003, 2002, 2001, 2000, 1999, 1998, 1997, 1996. This part is also sometimes called Audi A4 Engine Sensors. We stock knock sensor parts for most Audi models including A4 Quattro, 200 Quattro, 90, V8 Quattro, A8 Quattro, A6 Quattro, S4, A6, TT Quattro, Allroad Quattro, TT, 100, 90 Quattro, Q7, Coupe Quattro, Cabriolet, 100 Quattro, S6, 5000 and A3.

We stock these Knock Sensor brands for the Audi A4: Bosch and VDO.

Click to Enlarge 99 1999 Audi A4 Knock Sensor 1.8L 4 Cyl Bosch Retail Price: $79.63 Your Price: $44.75 Quantity: Part Number: W0133-1616751 Notes: Blue - 535mm Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle Engine •  1999 Audi A4 1.8L 4 Cyl

Click to Enlarge 98 1998 Audi A4 Knock Sensor 1.8L 4 Cyl Bosch Retail Price: $79.63 Your Price: $44.75 Quantity: Part Number: W0133-1616751 Notes: Blue - 535mm Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle Engine •  1998 Audi A4 1.8L 4 Cyl  •  1998 Audi A4 2.8L V6

Click to Enlarge 08 2008 Audi A4 Base Knock Sensor 2.0L 4 Cyl BWT VDO Retail Price: $82.00 Your Price: $62.75 Quantity: Part Number: W0133-1616045 Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle Sub Model Engine •  2008 Audi A4 Base  2.0L 4 Cyl BWT

Click to Enlarge 07 2007 Audi A4 Knock Sensor VDO Retail Price: $82.00 Your Price: $62.75 Quantity: Part Number: W0133-1616045 Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle •  2007 Audi A4

Click to Enlarge 06 2006 Audi A4 Knock Sensor 2.0L 4 Cyl VDO Retail Price: $82.00 Your Price: $62.75 Quantity: Part Number: W0133-1616045 Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle Engine •  2006 Audi A4 2.0L 4 Cyl

Image is not vehicle specific 05 2005 Audi A4 Knock Sensor 1.8L 4 Cyl VDO 750mm Green Retail Price: $57.00 Your Price: $41.75 Quantity: Part Number: W0133-1736832 Notes: Green - 750mm Product Remark: 750mm Green Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle Engine •  2005 Audi A4 1.8L 4 Cyl

Image is not vehicle specific 04 2004 Audi A4 Knock Sensor 1.8L 4 Cyl VDO 750mm Green Retail Price: $57.00 Your Price: $41.75 Quantity: Part Number: W0133-1736832 Notes: Green - 750mm Product Remark: 750mm Green Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle Engine •  2004 Audi A4 1.8L 4 Cyl

Image is not vehicle specific 03 2003 Audi A4 Knock Sensor 1.8L 4 Cyl VDO 750mm Green Retail Price: $57.00 Your Price: $41.75 Quantity: Part Number: W0133-1736832 Notes: Green - 750mm Product Remark: 750mm Green Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle Engine •  2003 Audi A4 1.8L 4 Cyl

Image is not vehicle specific 02 2002 Audi A4 Knock Sensor 1.8L 4 Cyl VDO 750mm Green Retail Price: $57.00 Your Price: $41.75 Quantity: Part Number: W0133-1736832 Notes: Green - 750mm Product Remark: 750mm Green Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle Engine •  2002 Audi A4 1.8L 4 Cyl

Image is not vehicle specific 01 2001 Audi A4 Knock Sensor 1.8L 4 Cyl AWM VDO 750mm Green Retail Price: $57.00 Your Price: $41.75 Quantity: Part Number: W0133-1736832 Notes: Green - 750mm Product Remark: 750mm Green Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle Engine •  2001 Audi A4 1.8L 4 Cyl AWM

Click to Enlarge 00 2000 Audi A4 Knock Sensor 1.8L 4 Cyl Bosch Retail Price: $79.63 Your Price: $44.75 Quantity: Part Number: W0133-1616751 Notes: Blue - 535mm Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle Engine •  2000 Audi A4 1.8L 4 Cyl

Click to Enlarge 99 1999 Audi A4 Knock Sensor 1.8L 4 Cyl Bosch Green Retail Price: $79.63 Your Price: $53.75 Quantity: Part Number: W0133-1614421 Notes: Green May require 3, 000 979 133 electrical connector. Green replaces black 0 261 231 004. Product Remark: Green Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle Engine •  1999 Audi A4 1.8L 4 Cyl

Click to Enlarge 97 1997 Audi A4 Knock Sensor 2.8L V6 AFC Bosch Retail Price: $79.63 Your Price: $44.75 Quantity: Part Number: W0133-1616751 Notes: Blue - 535mm Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle Engine •  1997 Audi A4 2.8L V6 AFC

Click to Enlarge 96 1996 Audi A4 Knock Sensor 2.8L V6 Bosch Retail Price: $79.63 Your Price: $44.75 Quantity: Part Number: W0133-1616751 Notes: Blue - 535mm Availability: In Stock Shipping Options: Ground, Overnight, 2 Day OEM This Product Fits the Following:   Vehicle Engine •  1996 Audi A4 2.8L V6