Hummer H3T Ignition Coil Replacement at your home or office.

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$140.18 - $319.12

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received a Ignition Coil Replacement.
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Ignition Coil Replacement Estimate for Hummer H3T

Hummer H3T Ignition Coil Replacement costs $225 on average.

CarServiceEstimateShop/Dealer Price
2010 Hummer H3TV8-5.3LService typeIgnition Coil ReplacementEstimate$240.51Shop/Dealer Price$291.17 - $416.65
2009 Hummer H3TL5-3.7LService typeIgnition Coil ReplacementEstimate$419.66Shop/Dealer Price$509.53 - $736.50
2009 Hummer H3TV8-5.3LService typeIgnition Coil ReplacementEstimate$494.26Shop/Dealer Price$599.63 - $875.68
2010 Hummer H3TL5-3.7LService typeIgnition Coil ReplacementEstimate$205.37Shop/Dealer Price$248.99 - $349.41
Show example Hummer H3T 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 Hummer mechanics

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YourMechanic Hummer Service

Average Rating

4.9/5

Number of Reviews

253

Rating Summary
238
9
2
0
4
238
9
2
0
4

Nathan

16 years of experience
230 reviews
Nathan
16 years of experience
Hummer H3 - Ignition Coil - Austin, Texas
Both times Nathan has been very kind and patient! I would definitely recommend him to anyone!!

Jean

24 years of experience
70 reviews
Jean
24 years of experience
Hummer H3 - Ignition Coil - Lawrenceville, Georgia
Jean arrived on time and was very knowledgeable and efficient at his skill set

Joe

42 years of experience
766 reviews
Joe
42 years of experience
Hummer H3 - Ignition Coil Replacement - Saint Petersburg, Florida
joe is always professional and on time,and most important great mechanic with many years of experience ,and all around just a nice guy,

Scott

35 years of experience
745 reviews
Scott
35 years of experience
Hummer H3 - Catalytic Converter - Chandler, Arizona
Another quality job completed by Scott!

Excellent Rating


YourMechanic Hummer Service

Average Rating

4.9/5

Number of Reviews

253

Rating Summary
238
9
2
0
4
238
9
2
0
4
Number of Hummer services completed
2783+
services done by our mechanics
TOTAL NUMBER OF EXPERT Hummer MECHANICS
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