Removing and installing gas discharge bulb control unit J343/J344 - vehicles up to model year 2014 — AUDI

🧭 Before you start

Fits: Audi A6/A7 C7 (4G, 2011–2018); platform code 4X

Don't miss

• Do not flash the headlights.
• Depending on the version, a bolt may be fitted instead of the fastener.
• Disregard (Item 3) and (arrow).

📋 Procedure

1. ⚠ High voltage! Danger to life!Ensure that any part of the gas discharge headlights marked with yellow high-voltage warning symbols are de-energised when you are working on them.Switch off ignition and all electrical equipment and remove ignition key.Do not flash the headlights. — Turn light switch to position "“0”".
2. Switch off the ignition and all electrical equipment and store the ignition key outside the vehicle.
3. Do not flash the headlights.
4. Right-side: Remove air cleaner housing 23Air cleaner; Removing and installing air cleaner housing or 24Air cleaner; Removing and installing air cleaner housing.
5. Loosen fastener (1) and disengage cap (2) from wheel housing liner (front section) (arrow). [Note: Depending on the version, a bolt may be fitted instead of the fastener.]

6. Remove bolts (arrows).
7. Press wheel housing liner (front section) slightly towards rear and detach housing cover (1).
8. Press retaining tab (2) to unplug electrical connector (1). [Note: Disregard (Item 3) and (arrow).]
9. Remove front wheel spoiler General body repairs, exterior66Wheel housing liners; Removing and installing wheel housing liner (front).
10. Remove bolts (arrows).
11. Detach control unit (1) from headlight housing.
12. Press retaining tabs (2, 5) and disconnect adapter cable (3) and electrical connector (6).
13. Detach control unit. [Note: If the left gas discharge bulb control unit cannot be removed as described, the water radiator (left-side) for the charge air cooling circuit must be removed. Remove radiator (left-side) for charge air cooling circuit 19Radiator/radiator fans; Exploded view - auxiliary radiator.]
14. Check seal (4) between control unit and headlight housing for damage.
15. Close housing cover and tighten bolts.

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