Audi A4: Underbody Trim Panel
Audi A4 (B9) 2016-2025 Service Manual / Body / Body Exterior / Exterior Equipment / Underbody Trim Panel
Overview - Underbody Trim Panels
1 - Nut
- 2 Nm
- Quantity: 2
2 - Front Underbody Panel
- Removing and installing. Refer to → Chapter "Underbody Trim Panel, Removing and Installing, Front".
3 - Impact Protector
4 - Bolt
- 2 Nm
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
- 2 Nm
- Quantity: 2
8 - Bolt
- 2 Nm
- Quantity: 3
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
- 2 Nm
12 - Bolt
- 2 Nm
13 - Bolt
- 2 Nm
- Quantity: 2
14 - Nut
- 2 Nm
- With fastener
- Quantity: 2
15 - Nut
- 2 Nm
- With fastener
- Quantity: 11
Overview - Underbody Bracing
1 - Bolt
- 55 Nm
- Quantity: 4
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 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-.
Installing
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
SEE MORE:
Overview - Seat Versions
Component Location Overview - Seat Versions
Overview - Front Seat
I - Standard Seat
Equipment:
Manual seat length/height and angle adjustment
Manual backrest angle adjuster
Height-adjustable headrest
Cargo net
Footwell lamp
Optional equipment:
Power seat length/height and a
Refrigerant Circuit Pressures and Temperatures
General Information
Caution
When performing work on refrigerant circuit, observe
all generally applicable safety precautions and pressure
container regulations.
The pressures and temperatures in the refrigerant circuit
depend on the current operating conditions (such as engine RPM,
cool
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