How to test the ignition coil on BMW Z3?

To test the ignition coil of an E36 model (except for the M44 engine), take off the valve cover trim or coil pack cover first, shut off the ignition switch, unplug the harness connector and measure the primary resistance between two outer terminals (terminals 1 and 15) of a coil socket aiming at approximately 0.4-0.8 ohms; you must replace it if exceeds this range. For this reason, there is an assembly with a combined ignition coil which employs four different coiled M44 engines; therefore, turn off all spark plugs on them and uncouple this set of wires by rotating electrical connector to the left side to receive proper evaluation at primary resistance via each terminal specified for separate coils (coil 1: Pin 1-Pin 2, coil 2: Pin 6-Pin 2, coil3: Pin7-Pin2, coil4: Pin5-Pin2) in order to obtain about 0.4-0.8 ohms; upon falling out from these limits, you will have to change a whole rack of coils in one go. There are several steps involved when removing and installing an Ignition Control Module (ICM). The Ignition Control Module (ICM) on these models is inherent in each particular ignition coil such that they cannot be replaced individually from the coils necessitating where ICM failures occur only complete replacement of those items as typified here.

Genuine BMW Z3 Ignition Coil

Ignition Coil Resistor

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4 Ignition Coils found

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BMW Z3 Ignition Coil
Part Number: 12131703228
$95.22 MSRP: $108.88
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Product Specifications
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1997-2002 BMW Z3 | 2.8L Engine(E36), Coupe(E36), Roadster 2.5L(E36), Roadster 2.8L(E36), Roadster 3.0L(E36)
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BMW Z3 Ignition Coil
Part Number: 12137599219
$95.22 MSRP: $108.88
You Save: $13.66 (13%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Coil Assembly
- Replaces: 12-13-9-067-830, 12-13-1-748-018
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1997-2002 BMW Z3 | 2.8L Engine(E36), Coupe(E36), Roadster 2.5L(E36), Roadster 2.8L(E36), Roadster 3.0L(E36)
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BMW Z3 Ignition Coil
Part Number: 12131748018
$95.22 MSRP: $108.88
You Save: $13.66 (13%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Replaced by: 12137599219
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1997-2002 BMW Z3 | 2.8L Engine(E36), Coupe(E36), Roadster 2.5L(E36), Roadster 2.8L(E36), Roadster 3.0L(E36)
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BMW Z3 Ignition Coil
Part Number: 12131247281
$175.51 MSRP: $204.10
You Save: $28.59 (15%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1996-1998 BMW Z3 | 1.9L Engine(E36), Roadster 1.9L(E36), Roadster(E36)

BMW Z3 Ignition Coil

BMW Z3 Ignition Coil turns the battery's modest 12 volts into up to 40,000 volts that jump each spark plug gap, lighting the air fuel mix and giving the roadster its trademark punch. Early Z3 models relied on one Ignition Coil feeding a distributor, so a failure meant a silent starter. Later years switched to waste spark coil packs that served two cylinders, and the current setups use coil on plug, with a dedicated Ignition Coil sitting directly above every plug for sharper timing, lighter wiring, and cleaner combustion. Every style shares the same core inside the Ignition Coil, two copper windings around an iron bar, the primary builds a magnetic field, the ECU suddenly breaks the circuit, the field collapses, and the secondary unleashes the high voltage surge. Heat, vibration, wide plug gaps, or high resistance wires can stress an Ignition Coil, causing misfires and warning lights, so keeping plugs fresh helps each BMW engine stay smooth and lets the Z3 keep thrilling BMW fans who prize the lively feel of a classic BMW Z3.

If you are looking for OEM BMW Z3 Ignition Coil, we highly recommend to shop with us. Not only do we offer budget friendly prices, but we also provide fast delivery. In addition, we have a hassle-free return policy on all genuine BMW Z3 Ignition Coil that come backed by the manufacturer's warranty.

BMW Z3 Ignition Coil Parts Questions & Experts Answers

Ignition Coil
12131703228
Q:
How to test the ignition coil on BMW Z3?
Posted by Phil V.
A:
To test the ignition coil of an E36 model (except for the M44 engine), take off the valve cover trim or coil pack cover first, shut off the ignition switch, unplug the harness connector and measure the primary resistance between two outer terminals (terminals 1 and 15) of a coil socket aiming at approximately 0.4-0.8 ohms; you must replace it if exceeds this range. For this reason, there is an assembly with a combined ignition coil which employs four different coiled M44 engines; therefore, turn off all spark plugs on them and uncouple this set of wires by rotating electrical connector to the left side to receive proper evaluation at primary resistance via each terminal specified for separate coils (coil 1: Pin 1-Pin 2, coil 2: Pin 6-Pin 2, coil3: Pin7-Pin2, coil4: Pin5-Pin2) in order to obtain about 0.4-0.8 ohms; upon falling out from these limits, you will have to change a whole rack of coils in one go. There are several steps involved when removing and installing an Ignition Control Module (ICM). The Ignition Control Module (ICM) on these models is inherent in each particular ignition coil such that they cannot be replaced individually from the coils necessitating where ICM failures occur only complete replacement of those items as typified here.
Answered by BMW Parts Specialist Tony / Oct 26, 2025

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