B58 Ignition Coil Conversion

Like every other part in and on your engine the ignition coils got on in years and wear out over time.

Meanwhile, ignition coil technology moved on and coils got stronger, more robust and more efficient.

So why not take the chance and upgrade to the latest generation of ignition coils introduced by BMW and Eldor with the B58 and S58 engines.

Compared to aftermarket solutions (for example with blue or red caps) these coils undergo excessive testing and quality controlling because they are used in countless engines.

That has two very significant advantages, the B58 igniton coils are readily available all over the world, and dirt cheap compared to aftermarket solutions.

Requirements

Minimum requirements:

• 6x BMW B58 or S58 from Eldor (BMW 12138643360)
• 6x TE MCON 1.2 sealed connector housing (TE 1-1718644-1)
• 18x TE MCON 1.2 sealed pin for 1.0mm² - 1.5mm² wire (TE 7-1452671-3)

If you want to be on the safe side, you can get yourself another spare ignition coil wiring harness where you perform the modification.

Hint: M52TU, M54 old style, M54 pencil coil and M56 engines all have different ignition coil wiring harnesses, so buy according to your engine, or change the plug on the car side, too.

For esthetic reasons, you ideally buy one from M54 engine with pencil coils because the rubber sealing of the wires will slide over the new connectors making it look better.

That needs modification of the connector on the car side though.