BMW 135is Ignition Coil Replacement at your home or office.

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Ignition Coil Replacement Estimate for BMW 135is

BMW 135is Ignition Coil Replacement costs $129 on average.

CarServiceEstimateShop/Dealer Price
2013 BMW 135isL6-3.0L TurboService typeIgnition Coil ReplacementEstimate$171.07Shop/Dealer Price$215.84 - $295.03
Show example BMW 135is Ignition Coil Replacement prices

Ignition Coil Replacement Service

What is an ignition coil and how does it work?

An ignition coil transforms ignition voltage (12 volts) to the very high voltage pulses (20,000 volts or more) that fire the spark plugs. The number of ignition coils varies depending on car model and year of production. Older cars will have one coil covering all engine cylinders while newer cars may have a coil-on-plug type arrangement — that is every cylinder will have its own dedicated ignition coil.

Ignition Coils

When to consider replacing an ignition coil:

  • Hard starting or no start. Ignition coils are subject to heat damage and electrical overload, both of which can cause partial or total failure. If the coil is faulty, you may have difficulty starting your car or it may not start at all.
  • Misfiring, loss of power, poor acceleration. Once the car is running, a bad ignition coil can cause poor operation of the engine. Should you have misfiring or loss of power, faulty ignition coils would be among the list of causes a mechanic would investigate. The Check Engine Light will often come on with a trouble code(s) indicating which cylinders are involved.

How do mechanics replace the ignition coil?

  • The ignition is checked to assure it is in the “off” position.
  • For single coils that supply all cylinders, the coil is disconnected from either a bracket located in the engine compartment or, in some cases, is removed from within the distributor. The replacement coil is secured and all electrical connections reattached. If the distributor was removed for any reason, the timing is adjusted as required.
  • For individual coil-on-plug applications, the coil is detached from the top of the individual spark plug and replaced.
  • Once the coil is securely in place, all electrical connections are reattached, and timing adjusted as needed, the car is road tested to ensure normal operation.

Is it safe to drive with an ignition coil problem?

Yes. A malfunctioning ignition coil will cause loss of power and lower fuel efficiency but that will not present an immediate safety issue. If the coil malfunction is causing misfiring, this will allow unburned fuel to enter and permanently damage the catalytic converter from overheating.

When replacing an ignition coil keep in mind:

  • Ignition coil failure can be caused by faulty spark plugs or wires. The mechanic will inspect and may recommend replacement of those components.
  • In a coil-on-plug ignition system, if only one coil fails, you need only replace the faulty coil. Remaining functioning coils can be left in place.
  • In systems with the coil located in the distributor, it may be more cost-effective to replace the entire distributor rather than remove and replace just the coil.

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Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

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Rating Summary
138
2
1
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3
138
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Quentin

22 years of experience
213 reviews
Quentin
22 years of experience
BMW 328i L6-3.0L - Ignition Coil - Houston, Texas
Once again, flawless on time work

Jerimiah

19 years of experience
328 reviews
Jerimiah
19 years of experience
BMW 328i L6-3.0L - Ignition Coil - Las Vegas, Nevada
This is the second time we requested him

Anietie

23 years of experience
20 reviews
Anietie
23 years of experience
BMW 525i L6-2.5L - Ignition Coil - Los Gatos, California
Bill was nothing short of awesome! He arrived early, he talked me through what he was going to do, proactively notified me of other components that could be affected and finished the job in 1/2 the quoted time. Since he'd been under the hood, he made sure to let me know the state of the engine (he checked for leaks, oil, filters, etc.) , and told me, luckily, that it was in good shape. I would literally change my schedule to make him available, even for something as simple as an oil change.

Albert

15 years of experience
46 reviews
Albert
15 years of experience
BMW X3 L6-3.0L - Ignition Coil - Chino Hills, California
Albert was timely, professional, courteous and knowledgeable. I appreciate his work and professionalism.

Excellent Rating

(144)

Rating Summary
138
2
1
0
3
138
2
1
0
3
Number of BMW Ignition Coil Replacement services completed
1584+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1100+
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