How to Replace an Ignition Coil

Schedule Ignition Coil Replacement
Service Area

$116.03 - $496.04

Price range for all vehicles
Average rating from 1,159 customers who received a Ignition Coil Replacement.

Your vehicle’s ignition coil sends an electrical signal from the computer to your spark plugs. A failing coil can result in a number of problems, such a stalled vehicle, rough idling, or vehicle failure just to name a few. Replacing the ignition coil is a relatively simple and inexpensive process.

Part 1 of 1: Replacing an ignition coil

Materials Needed

battery showing the red and black cables

Step 1: Disconnect the battery. Disconnect the negative battery cable to cut power to the vehicle. Use a socket or wrench to disconnect the clamp bolt holding the cable to the terminal.

  • Tip: Always disconnect the battery when working on electrical systems of any kind.

location of the ignition coil in the engine compartment

Step 2: Locate the ignition coils. Locate the ignition coils on top of the engine. They will be attached to the engine block or surrounding components.

retaining bolts or screws holding the ignition coil in place as well as electrical connectors

Step 3: Disconnect and remove the old ignition coil. You will need to disconnect the bolts or screws attaching the coil to the vehicle. You will also need to disconnect the electrical connectors from the coil.

Determine which connection needs to be broken first depending on your particular make and model.

On some vehicles, the electrical connections need to be unscrewed or unplugged first, while on others, you will need to unbolt the unit before you can disconnect the electrical connectors. You can refer to your vehicle’s service manual to determine the proper procedure for your particular car.

  • Tip: Ignition coils which run multiple plugs from one coil will have multiple electrical connections to remove. Be sure to mark or label these connectors for reassembly. You MUST reattach the wires to the correct corresponding connections on the new coil.

Once the old coil has been disconnected, you can remove it from the vehicle.

new ignition coil prepped for installation

Step 4: Install the new ignition coil. Install the new ignition coil in reverse of the order in which you disconnected the old one.

If you previously disconnected the electrical connectors first, reconnect them last after securing the mounting bolts or screws.

  • Tip: If you had to label multiple electrical connections when removing the old coil, make sure you are reconnecting these wires to the proper terminals on the new coil.

Step 5: Reconnect the battery. Reattach the negative battery terminal to the car battery to restore power to the vehicle.

Hand tighten the electrical connection, and then use a socket or wrench to tighten down the terminal bolt.

  • Warning: Never over-tighten the bolts. This could cause damage and replacements are often hard to find. You want to tighten the bolts just enough so that any engine vibration will not loosen them.

Once the replacement is complete, close the hood.

Step 6: Test the new coil. Start the engine with the vehicle in park to test the new ignition coil. If the vehicle starts and idles normally, you can then test drive the vehicle.

Ignition coil failure can cause one or more cylinders to misfire which can result in driveability issues. By following the above guide, the stressful stuttering and sluggish nature of a malfunctioning coil can be resolved with minimal expenses and in a short amount of time. However, if you find yourself in need of assistance, or you would simply prefer that a professional perform this repair, you can always have one of the certified technicians at YourMechanic come to your home or office to replace your ignition coil for you.


Next Step

Schedule Ignition Coil Replacement

The most popular service booked by readers of this article is Ignition Coil Replacement. Yourmechanic’s technicians bring the dealership to you by performing this job at your home or office 7 days a week between 7AM-9PM. We currently cover over 10k cities and have 100k+ 5-star reviews... LEARN MORE

SEE PRICING & SCHEDULING

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Recent Ignition Coil Replacement reviews

Excellent Rating


YourMechanic Ignition Coil Replacement Service

Average Rating

4.8/5

Number of Reviews

1,159

Rating Summary
1,077
43
8
8
23
1,077
43
8
8
23

Daniel

20 years of experience
316 reviews
Daniel
20 years of experience
Volvo 960 - Ignition Coil - Houston, Texas
Excellent!! Daniel is the best. His years of experience and expertise made my 1996 960 Volvo Sedan run so beautifully again. I highly recommend Daniel if you need an excellent mechanic. The best.
Nissan Rogue - Ignition Coil - Pasadena, Texas
Extremely fast and fixed the problem in minutes. Definitely reliable and knows what he’s doing. Would recommend to anyone.

Chris

21 years of experience
1693 reviews
Chris
21 years of experience
BMW 550i GT - Ignition Coil - Menifee, California
Are usually never do these reviews but this is an exception. Chriss was very punctual something that us military can appreciate and very professional. Answered any and all my questions while still performing his job in the utmost matter! After he was finished he went over everything done and even pointing out other things going above and beyond The scope of what he was here to do ! I know my vehicle was in great hands!
Ford F-150 - Ignition Coil - Lake Elsinore, California
Chris went above and beyond to effect this repair. He encountered some problems with rust and rounded off bolts, but his experience and persistence allowed him to Prevail and fix the problem. Great mechanic would be happy to recommend him or use him again for any and all automotive repair work.

Sean

16 years of experience
50 reviews
Sean
16 years of experience
Toyota Corolla - Ignition Coil - Alexandria, Virginia
Sean was awesome. Very communicative, worked efficiently, answered all of my questions, and I’m very happy with his work.

Jeshua

6 years of experience
82 reviews
Jeshua
6 years of experience
Nissan 350Z - Ignition Coil - Parrish, Florida
Flight on time they are nice guy did great work got the job done in 40 minutes. Would highly recommend him.

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE