Audi A4: Underbody Trim Panel
Overview - Underbody Trim Panels

1 -
Nut
2 -
Front Underbody Panel
- Removing and installing. Refer to
→ Chapter "Underbody Trim Panel, Removing and Installing, Front".
3 -
Impact Protector
4 -
Bolt
5 -
Center Underbody Trim Panel
- Removing and installing. Refer to
→ Chapter "Underbody Trim Panel, Removing and Installing, Center".
6 -
Rear Underbody Trim Panel
- Removing and installing. Refer to
→ Chapter "Underbody Trim Panel, Removing and Installing, Rear".
7 -
Nut
8 -
Bolt
9 -
Side Underbody Trim Panel
- Removing and installing. Refer to
→ Chapter "Underbody Trim Panel, Removing and Installing, Side".
10 -
Bracket
- For the rear underbody trim panel
11 -
Nut
12 -
Bolt
13 -
Bolt
14 -
Nut
- 2 Nm
- With fastener
- Quantity: 2
15 -
Nut
- 2 Nm
- With fastener
- Quantity: 11
Overview - Underbody Bracing

1 -
Bolt
2 -
Bolt
- 50 Nm + 90º
- Replace after removing
- Quantity: 5
3 -
Right Diagonal Brace
- Removing and installing. Refer to
→ Chapter "Diagonal Braces, Removing and Installing".
4 -
Left Diagonal Brace
- Removing and installing. Refer to
→ Chapter "Diagonal Braces, Removing and Installing".
5 -
Bolt
- 50 Nm + 90º
- Replace after removing
- Quantity: 5
6 -
Tunnel Brace
- Removing and installing. Refer to
→ Chapter "Tunnel Brace, Removing and Installing".
READ NEXT:
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-.
Installing
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
Overview - Exterior Rearview Mirror
1 -
Mirror Trim
2 -
Bolt
1.5 Nm
3 -
Mirror Adjusting Unit
Removing and installing. Refer to
→ Chapter "Mirror Adjusting
SEE MORE:
Overview - Bumper Cover
1 -
Towing Eye Cover
2 -
Bumper Cover
Removing and installing. Refer to
→ Chapter "Bumper Cover, Removing and Installing".
Adjusting. Refer to
→ Chapter "Bumper Cover, Adjusting".
Overview - rear reflector. Refer to
→ Chapter "O
Removing
- Move the front seats all the way forward.
- Unclip the child seat anchor guides (quantity: four)
-1- from anchorages. Refer to
→ Chapter "Lower Child Seat Anchor Guide, Removing and
Installing".
- With both hands, grasp the bench seat -1-
under the seat frame -2-.