How to change front window regulator on BMW 3 Coupe (E46) – replacement guide
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The steps may slightly vary depending on the car design.
This video shows the replacement procedure of a similar car part on another vehicle

- All work should be done with the engine stopped.
- Step 1

Open the car door.
- Step 2

Remove the caps from the door armrest fasteners. Use a plastic trim tool.
AUTODOC recommends:Replacement: window regulator – BMW 3 Coupe (E46). Do not use excessive force when removing the part as this may damage it.
- Step 3

Disconnect the wing mirror control module. Use a plastic trim tool.
AUTODOC recommends:Replacement: window regulator – BMW 3 Coupe (E46). To avoid damaging the part when removing it, do not use excessive force.
- Step 4

Disconnect the wing mirror control connectors.
- Step 5

Unscrew the door handle fastener. Use Torx T25.
- Step 6

Remove the door card trim panel. Use a plastic trim tool.
Replacement: window regulator – BMW 3 Coupe (E46). Tip from AUTODOC experts:Do not apply excessive force when removing the part. Otherwise you may damage it.
- Step 7

Unscrew the door card fasteners. Use Torx T25.
- Step 8

Detach the door card. Use a plastic trim tool.
- Step 9

Detach the door lock actuator cable.
- Step 10

Disconnect the audio system speaker connectors. Disconnect the wing mirror control connectors from the door card.
- Step 11

Detach the door panel sound insulation.
AUTODOC recommends:Do not apply excessive force when removing the part. Otherwise you may damage it.
- Step 12

Unscrew the SRS control module fasteners. Use a drive socket #10. Use a ratchet wrench.
- Step 13

Remove the SRS module.
AUTODOC recommends:Do not apply excessive force when removing the part. Otherwise you may damage it.
- Step 14

Detach the door panel sound insulation.
- Step 15

Install the SRS module.
AUTODOC recommends:Replacement: window regulator – BMW 3 Coupe (E46). To avoid damaging the part during installation, do not use excessive force.
- Step 16
Screw in the SRS module fasteners. Use a drive socket #10. Use a ratchet wrench.
Step 17
Disconnect the power window module connector.
- Step 18

Unscrew the fasteners of the power window module. Use Torx T30. Use a ratchet wrench.
- Step 19

Remove the power window switch module.
- Step 20

Unscrew the window glass fasteners. Use a drive socket #8. Use a ratchet wrench.
- Step 21

Raise the glass a little and remove it.
Replacement: window regulator – BMW 3 Coupe (E46). Professionals recommend:To avoid injury, hold the glass when raising it.Do not apply excessive force when removing the part. Otherwise you may damage it.
- Step 22

Unscrew the fasteners of the window regulator assembly. Use a drive socket #10. Use a ratchet wrench.
- Step 23

Squeeze the retainer of the window regulator actuator to release and disconnect it. Use round-nose pliers.
- Step 24

Remove the window regulator actuator.
- Step 25

Install the power window switch module.
- Step 26

Tighten the fasteners of the power window module. Use Torx T30. Use a torque wrench. Tighten it to 11 Nm torque.
- Step 27

Attach the window regulator drive gear.
- Step 28

Tighten the fasteners of the window regulator assembly. Use a drive socket #10. Use a torque wrench. Tighten it to 11 Nm torque.
- Step 29
Attach the retainer of the window regulator actuator.
Step 30
Treat the power window module connector. Use dielectric grease.
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