HID headlamp bulb, replacing
CAUTION:
- HIGH VOLTAGE!
- Always disconnect negative ( - ) battery terminal prior to working on parts of HID headlamp components marked with yellow "HIGH VOLTAGE" warning symbols.
- The physical and mechanical properties of HID bulbs are very sensitive. Internal pressure of HID glass bulb may exceed 100 bar (in operation). Bulb temperature may exceed 700 degrees Celsius.
- Danger of explosion and burning.
- The control modules for HID lamps must never be operated (headlamps turned on) without an HID lamp.
- HID bulbs must only be operated (headlamps turned on) when installed in the headlamp housing.
- Always wear safety glasses and gloves when removing and installing HID bulb.
- Never look directly at an operating HID bulb. The UV emissions of an HID bulb are approximately 2.5 times that of a comparable halogen bulb..
Removing
- Disconnect battery. Audi A4 S4 → Battery in engine compartment, disconnecting and reconnecting . Audi RS4 → Battery in luggage compartment, disconnecting and connecting .
Left headlamp
- Remove top section of washer fluid reservoir and power steering reservoir.
Right headlamp - vehicles with 1.8L 4-cylinder Turbo engine:
- Preparation.
Right headlamp - vehicles with 2.0L 4-cylinder Turbo FSI engine:
- Preparation.
Right headlamp - vehicles with 3.0L 6-cylinder engine
- Preparation.
Right headlamp - vehicles with 3.2L 6-cylinder FSI engine
- Preparation.
Right headlamp - vehicles with 4.2L 8-cylinder engine (Audi S4)
- Preparation.
Right headlamp - vehicles with 4.2L 8-cylinder FSI engine (Audi RS4)
- Preparation.
Both sides, continued:
- Remove screws - 1 - and - 2 -.
- Remove cover for low beam from headlamp housing - arrow -.
- Remove electrical wire from retainers - arrow -.
- Disconnect electrical connection - 4 -.
- Release retaining clips - 1 - and - 3 - and remove HID headlamp bulb - 2 - from housing.
Faulty HID headlamp bulb disposal → HID headlamp bulb, disposal
Installing
Install in reverse order of removal, noting the following:
CAUTION:
- Do not touch glass portion of bulb with bare hands. Even the smallest amount of moisture and/or contaminants from fingers that evaporates on the bulb during operation can cause the glass to cloud over.
- When installing housing cover, ensure proper seating. Water intrusion will damage headlamp.
- Insert new HID headlamp bulb in housing.
NOTE:
- Note installation position: the electrical connection must always point downwards.
- Secure HID headlamp bulb with retaining clips.
- Reconnect battery. Required steps Audi A4 S4 Reconnecting . Required steps Audi RS4
Tightening torque
| Component | Nm |
| Housing cover for low beam to headlamp housing | 1.5 |