BMW 545i Ignition Coil Replacement Costs

Car	Service	Estimate	Shop/Dealer Price
2004 BMW 545iV8-4.4L	Service typeIgnition Coil Replacement	Estimate$940.28	Shop/Dealer Price$1142.90 - $1736.59
2005 BMW 545iV8-4.4L	Service typeIgnition Coil Replacement	Estimate$931.27	Shop/Dealer Price$1130.80 - $1722.17

Car

Service

Estimate

Shop/Dealer Price

2004 BMW 545iV8-4.4L

Service typeIgnition Coil Replacement

Estimate$940.28

Shop/Dealer Price$1142.90 - $1736.59

2005 BMW 545iV8-4.4L

Service typeIgnition Coil Replacement

Estimate$931.27

Shop/Dealer Price$1130.80 - $1722.17

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.

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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Torrieanto

13 years of experience

632 reviews

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by Derek

BMW 545i V8-4.4L - Transmission Mount - Largo, Florida

another great experience

Chris

23 years of experience

2372 reviews

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by sammy

BMW 545i V8-4.4L - Car is not starting - Corona, California

hi, Mr Chris Allshouse. He came by to day . he had check the BMW 2004 545 i, he told me that the timing censer's on each side of the valve cover's was broke I just want to say that Chris Allshouse is a smart guy he said the problem is the censers he said that 90% it is the PROBLEM. i have took that car to a few mechanic's told me all deferent stories. why is not starting. so the truth is I paid the other mechanic's. they just took my money. so I am going to let him finish the job on my 2004 BMW 545 I . but he said it cost $80 dollars to check and that if he gets the job that $50 dollars will go to the repairs..thats fine. i want him to fix it and ill pay it by a money ORDER or CASH which ever you prefer when the job is DONE .but I am a man of my word. he get's it Running I will give him a money tip.PLEASE CALL ME SAMMY MITCHELL -951-818-8105 When it's running as he said to me . lets complete the job to get it running.if you prefer other armaments ,just call me please

Enrique

22 years of experience

244 reviews

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by fares

BMW 545i V8-4.4L - Pre-purchase Car Inspection - Orlando, Florida

Jay

24 years of experience

262 reviews

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by raynold

BMW 545i V8-4.4L - Adjust Parking Brake Cable - Buffalo Grove, Illinois

I was hopeful he would be able to adjust parking brake but was unable to do so due to a locked up star adjusting nut. Will have to get towed to a shop to have fixed.

BMW 545i 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 545i Ignition Coil Replacement is $533 with $393 for parts and $140 for labor. Prices may vary depending on your location.

What is an ignition coil and how does it work?

When to consider replacing an ignition coil:

How do mechanics replace the ignition coil?

Is it safe to drive with an ignition coil problem?

When replacing an ignition coil keep in mind:

Meet some of our expert BMW mechanics

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Torrieanto

Chris

Enrique

Jay

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