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Knock Sensor, Removing And Installing: Removing

WARNING: This page is about a different car, the 2015 Audi A8 Quattro, 2014 Audi A8 Quattro, 2013 Audi A8, and 2012 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.

Component locations, refer to OVERVIEW - IGNITION SYSTEM .

NOTE:

Install all cable ties and heat shield boots in the same locations when installing.

Knock Sensor 1 -G61- 

-- Remove the generator, refer to GENERATOR, REMOVING AND INSTALLING .

-- Disconnect the connector -1-.

-- Remove the bolt -2- and Knock Sensor 1 -G61-.

Fig 1: Identifying Knock Sensor 1, Connector And Bolt
GWWA28-10066Courtesy of AUDI OF AMERICA, LLC

Knock Sensor 2 -G66- /Knock Sensor 3 -G198- : 

-- Disconnect the connectors -1 and 2-.

Fig 2: Identifying Knock Sensor 2 And 3 Connectors
GWWA24-10928Courtesy of AUDI OF AMERICA, LLC

-- Remove the left and right fuel rails, refer to FUEL INJECTORS, REMOVING AND INSTALLING .

-- Remove the bolt and each knock sensor:

  1. Knock Sensor 2 -G66-
  2. Knock Sensor 3 -G198-
Fig 3: Identifying Knock Sensor 2 And 3 Bolts
GWWA28-10065Courtesy of AUDI OF AMERICA, LLC

Knock Sensor 4 -G199-

Fig 4: Identifying Front Wheel Housing Liner
GWWA66-10665Courtesy of AUDI OF AMERICA, LLC

-- Remove the left front wheel housing liner completely, refer to FRONT WHEEL HOUSING LINER, REMOVING AND INSTALLING .

-- Remove the bolts -arrows- and the left drive axle heat shield.

Fig 5: Identifying Left Drive Axle Heat Shield And Bolts
GWWA34-10397Courtesy of AUDI OF AMERICA, LLC

-- Remove the left drive axle from the transmission flange shaft, refer to DRIVE AXLE, REMOVING AND INSTALLING .

Fig 6: Identifying Left Drive Axle And Transmission Flange Shaft
GWWA40-10384Courtesy of AUDI OF AMERICA, LLC

-- Cut the cable tie and remove the heat shield boot -1-.

-- Disconnect the connector -3-.

-- Remove the bolt -2- and Knock Sensor 4 -G199-.

Fig 7: Identifying Heat Shield Boot, Knock Sensor 4 And Bolt
GWWA28-10067Courtesy of AUDI OF AMERICA, LLC