Front view of the underbody of an Audi 80 with a 4-cylinder carburetor engine
1. Drive shaft
2. Rear gearbox mount
3. Transmission oil drain plug
4. Exhaust outlet pipe
5. Cooling fan thermal switch
6. Engine oil drain plug
7. Water pump
8. Engine mounting bracket
9. Sound signal
10. Anti-roll bar
11. Lower suspension arm
Front view of the underbody of an Audi 90 with a 5-cylinder engine and fuel injection system
1. Drive shaft
2. Rear gearbox mount
3. Transmission oil drain plug
4. Exhaust outlet pipe
5. Thermal protection
6. Lower suspension arm
7. Engine mounting bracket
8. Oil filter
9. Front frame
10. Engine oil drain plug
11. Generator
12. Radiator
13. Cooling fan thermal switch
14. Lower hose
15. Sound signal
16. Expansion tank supply hose
17. Anti-roll bar
Rear view of the underbody of an Audi 80 with a 4-cylinder carburetor engine
1. Rear muffler
2. Rear axle torsion bar
3. Fuel tank feed and return pipes
4. Brake pressure regulator
5. Rear axle suspension trailing arm
6. Diagonal thrust
7. Rubber hanger for exhaust system
8. Handbrake cable
9. Hydraulic flexible brake hose
Rear view of the underbody of an Audi 90 with a 5-cylinder engine and fuel injection system
1. Rear muffler
2. Rear axle torsion bar
3. Fuel tank feed and return pipes
4. Brake pressure regulator
5. Rear axle suspension trailing arm
6. Fuel pump
7. Fuel filter
8. Fuel accumulator
9. Diagonal thrust
10. Handbrake cable
11. Hydraulic flexible brake hose
12. Rubber hanger for exhaust system