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:
Fig. 162 Engine compartment: connectors for a charger or
jump start cables
Observe the safety precautions > General
information, in Battery general information.
Requirement: only use chargers with a maximum
charging current of 14.8 volts. The battery cables
remain connected.
The charging cable c
General Information
Only valves and connections that are resistant to
refrigerant R134a and refrigerant oil must be installed.
Different connections (outer diameter) for high pressure and
low pressure side.
Discharge the refrigerant circuit before removing valves or
valve inserts.
Always scr