Audi A4 Owners & Service Manuals

Audi A4: Underbody Trim Panels, Removing and Installing

Audi A4 (B9) 2016-2023 Service Manual / Body / Body Exterior / Exterior Equipment / Underbody Trim Panels, Removing and Installing

Underbody Trim Panel, Removing and Installing, Front

Removing

- Remove the nuts -arrows-.

- Remove the front underbody trim panel -2- from the center underbody trim panel -1-.

A66-11721

Installing

Install in reverse order of removal.

Tightening Specifications

  • Refer to → Chapter "Overview - Underbody Trim Panels"

Underbody Trim Panel, Removing and Installing, Center

Removing

- Remove the nuts -arrows- and the bolt -2-.

- Remove the center underbody trim panel -1-.

A66-11634

Installing

Install in reverse order of removal.

Tightening Specifications

  • Refer to → Chapter "Overview - Underbody Trim Panels"

Underbody Trim Panel, Removing and Installing, Rear

Removing

- Remove the nuts -2 and 3- and bolts -1-.

- Remove the rear underbody trim panel -4-.

A66-11700

Installing

Install in reverse order of removal.

Tightening Specifications

  • Refer to → Chapter "Overview - Underbody Trim Panels"

Underbody Trim Panel, Removing and Installing, Side

Removing

- Remove the nuts -3- and bolts -1-.

- Remove the side underbody trim panel -2-.

A66-11722

Installing

Install in reverse order of removal.

Tightening Specifications

  • Refer to → Chapter "Overview - Underbody Trim Panels"

Tunnel Brace, Removing and Installing

Removing

- Remove the bolts -arrows-.

- Remove the tunnel brace -1-.

A66-11723

Installing

Install in reverse order of removal.

Tightening Specifications

  • Refer to → Chapter "Overview - Underbody Bracing"

Diagonal Braces, Removing and Installing

  Caution

This procedure contains mandatory replaceable parts. Refer to component overview and parts catalog prior to starting procedure.

Mandatory Replacement Parts

  • Bolts - Right Diagonal Brace to Body
  • Bolts - Left Diagonal Brace to Body

Removing

  NOTICE

Risk of damaging the thread by using an impact wrench.

- When installing, position the bolts by hand and screw in the first threads.

- Do not loosen or tighten the bolts with an impact wrench.

- Remove the bolts -1 and 3- and remove the diagonal braces -2 and 4-.

A66-11701

Installing

Install in reverse order of removal and note the following:

Tightening Specifications

  • Refer to → Chapter "Overview - Underbody Bracing"

    READ NEXT:

     Roof Molding/Roof Railing

    Overview - Roof Railing 1 -  Nut Quantity: 4 Insert with locking fluid. Refer to the Parts Catalog. Tightening specification and sequence. Refer to → Fig. "Roof Railing - Tightening

     Exterior Rearview Mirror

    Overview - Exterior Rearview Mirror 1 -  Mirror Trim 2 -  Bolt 1.5 Nm 3 -  Mirror Adjusting Unit Removing and installing. Refer to → Chapter "Mirror Adjusting

     Wheel Housing Liner

    Overview - Front Wheel Housing Liner Overview - Wheel Housing Liner 1 -  Drive Axle Cover Removing and installing. Refer to → Chapter "Drive Axle Cover, Removing and Installing".

    SEE MORE:

     Menus and symbols

    Fig. 15 MMI: center display Overview screen Displays selected information tiles and provides quick access to certain functions Quick access bar Return to the home screen or the overview page, open menus quickly Display area Select a menu, apply settings, display content F

     Other information

    Online Car Care Applies to: vehicles with Online Car Care If new messages from Online Car Care are available, they will be displayed in the MMI when you switch on the ignition. Applies to: MMI: To access Online Car Care messages at a later time, select on the home screen: VEHICLE > Settings &

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