Ignition Coil, test or replace

# Ignition Coil, check or replace.

### Checking ignition coil.

Primary coil : Measure resistance between between terminals 1 and 15 (arrows) Resistance value should be 0.82 Ohms. |
Secondary coil : Measure resistance between terminal 15 and terminal 4 (tower) Resistance value should be 8.25 K Ohms.
Note: Terminal numbers 1 and 15 are embossed on the top of the coil.
Check for signs of burning or for hairline cracks around the coil's top surface.
Check the condition of the heat sensitive plug in the top of the coil. If the plug has been pushed out, replace the coil.
If coil fails any of the above tests, replace it.

### Replacing Ignition Coil

Twist and pull coil wire off coil
Remove the 6 and 8mm nuts securing terminals 1 and 15 to coil.
Loosen 10mm bolt securing coil bracket to body and slide coil out of bracket. |

E30 M3 Repair Manual V2.7. Copyright ©1999-2001 Koala Motorsport & Brett Anderson