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BMW 840Ci Ignition Coil Replacement at your home or office.

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Ignition Coil Replacement Service

How much does a Ignition Coil Replacement cost?

On average, the cost for a BMW 840Ci Ignition Coil Replacement is $560 with $420 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1997 BMW 840CiV8-4.4LService typeIgnition Coil ReplacementEstimate$995.00Shop/Dealer Price$1211.30 - $1846.03
1994 BMW 840CiV8-4.0LService typeIgnition Coil ReplacementEstimate$2084.87Shop/Dealer Price$2572.80 - $4029.37
1995 BMW 840CiV8-4.0LService typeIgnition Coil ReplacementEstimate$2084.87Shop/Dealer Price$2572.84 - $4029.44
1996 BMW 840CiV8-4.4LService typeIgnition Coil ReplacementEstimate$985.99Shop/Dealer Price$1199.24 - $1831.68
Show example BMW 840Ci Ignition Coil Replacement prices

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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Number of BMW Ignition Coil Replacement services completed
1782+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1200+
experts on our platform
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Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(162)
Rating Summary
153
2
1
1
5
153
2
1
1
5

Jeremy

21 years of experience
802 reviews
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Jeremy
21 years of experience
Request Jeremy
by Thomas
BMW 840Ci V8-4.4L - Battery - Boynton Beach, Florida
On time, nice guy, always does a good job. I will be in touch with him and YourMechanic.com again in the near future. Thanks again!

Adam

18 years of experience
263 reviews
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Adam
18 years of experience
Request Adam
by Thomas
BMW 840Ci V8-4.4L - Car is not starting - Boynton Beach, Florida
Adam was great. He was on-time and had to wait because of a stupid HOA rule. He got the car started again recommended a good charger, and was extremely through in his inspection that identified a couple problem with the oil caps that need to be replaced. I highly recommend Adam and plan n using him again when i receive the quote for the recommended services.

Amor

44 years of experience
181 reviews
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Amor
44 years of experience
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by sonny
BMW 325i L6-3.0L - Ignition Coil - Alameda, California
Completed another great job and assisted with information to help keep up maintenance!!! Can't ask for a better job than what was done..

Fred

18 years of experience
389 reviews
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Fred
18 years of experience
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by Michael
BMW 328i L6-3.0L - Ignition Coil - Spring, Texas
This is the second time I used Fred and he is prompt, very knowledgeable and trustworthy.

Excellent Rating

(162)
Rating Summary
153
2
1
1
5
153
2
1
1
5
Number of BMW Ignition Coil Replacement services completed
1782+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1200+
experts on our platform
Yourmechanic was featured in

New York Times NBC CBS Forbes INC Tech Crunch

Learn more about us

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