12 63 520 Replacing DME master relay (N14)

Necessary preliminary tasks: 

• Switch off ignition
• Open electronics box.

Remove DME master relay.

Fig 1: Identifying DME Master Relay

Courtesy of BMW OF NORTH AMERICA, INC.

Notes on troubleshooting: 

If the starter motor cranks the engine during the starting sequence but the engine fails to fire, then:

1. Check engine fuses
2. If the fuses have blown, replace them completely with the fuse holder
3. Find out why fuses have blown

Continue troubleshooting as per DIS instructions.