Cadillac STS Spark Plug Replacement Costs

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Spark Plug Replacement Service

How much does a Spark Plug Replacement cost?

On average, the cost for a Cadillac STS Spark Plug Replacement is $281 with $62 for parts and $219 for labor. Prices may vary depending on your location.

Car	Service	Estimate	Shop/Dealer Price
2006 Cadillac STSV8-4.4L Turbo	Service typeSpark Plug Replacement	Estimate$357.30	Shop/Dealer Price$397.95 - $498.64
2008 Cadillac STSV8-4.4L Turbo	Service typeSpark Plug Replacement	Estimate$343.79	Shop/Dealer Price$379.80 - $477.01
2007 Cadillac STSV6-3.6L	Service typeSpark Plug Replacement	Estimate$958.87	Shop/Dealer Price$1082.23 - $1426.69
2005 Cadillac STSV8-4.6L	Service typeSpark Plug Replacement	Estimate$643.96	Shop/Dealer Price$735.13 - $993.29
2009 Cadillac STSV8-4.6L	Service typeSpark Plug Replacement	Estimate$716.70	Shop/Dealer Price$837.61 - $1175.40
2011 Cadillac STSV6-3.6L	Service typeSpark Plug Replacement	Estimate$988.75	Shop/Dealer Price$1120.43 - $1487.95
2007 Cadillac STSV8-4.6L	Service typeSpark Plug Replacement	Estimate$661.02	Shop/Dealer Price$763.16 - $1055.56
2010 Cadillac STSV6-3.6L	Service typeSpark Plug Replacement	Estimate$1075.51	Shop/Dealer Price$1228.02 - $1659.96

Show example Cadillac STS Spark Plug Replacement prices

What are spark plugs and how do they work?

Spark plugs are one of the key components of your vehicle’s ignition system. They ignite gasoline and air inside of your engine. This gives your engine the power to propel you down the road. The spark plug takes high voltage electricity from the ignition coil and creates a spark at just right moment during the engine’s combustion cycle. This gives the engine the best mix of power, fuel economy and low emissions. However, the electrode at the end of the spark plug eventually wears out and can cause performance issues.

Spark plugs-MATROX-1

When should you replace spark plugs?

Replacement should follow the vehicle maintenance schedule. This will be listed in the vehicle’s owner’s manual. Some cars require regular replacement at 30k, 60k or 100k miles. It is possible in some cases that a spark plug might fail before the service schedule, but it’s not typically common.

Avoiding spark plug replacement can cause:

Difficulty starting your car.
Check engine light for a misfire code.
Flashing check engine light during acceleration for misfire, this can cause engine damage.
Reduced fuel economy and/or power.
Rough idle and/or unexplained engine vibration.
Failed State emission testing.

Even if only one spark plug is found to be faulty, they should always be replaced in sets. Most engines will require 4,6, or 8 spark plugs.

How do mechanics replace spark plugs?

Spark plugs are threaded into the engine’s cylinder head(s). Most cars have one plug per cylinder, so a four-cylinder engine will have four plugs, a six-cylinder engine will have six plugs, and so forth. The mechanic will:

Have the correct spark plugs on hand for your vehicle
Pull any diagnostic trouble codes that may be related to worn spark plugs.
Remove the original spark plugs and look at removed spark plugs for any clues indicating engine mis-operation exists; such as oil burning, excessively rich mixture, pre-ignition damage etc. Inform owner of any found unusual conditions.
Install new plugs using a torque wrench.
Finally, a road test of the vehicle to confirm normal operation.

Is it safe to drive with worn spark plugs?

Yes, but spark plugs that are worn enough to cause engine-misfiring have the potential to cause engine damage and overheating of the catalytic converter. Regardless of the age of the plugs, or mileage, if the engine misfires or runs poorly, the plugs should be inspected for defects. Generally, spark plug failure will not keep the engine from running, but in cases of extreme wear, you may experience a limitation in the speed at which you can drive the car. If the maintenance schedule says the plugs should be replaced, it is best to do so promptly.

When having spark plugs replaced keep in mind:

High-speed driving may accelerate spark plug wear. Consider earlier than required inspection and tune-up if you operate the car in severe conditions.
Plugs should always be promptly replaced per the manufacturer maintenance schedule even if they appear to be working perfectly.
If your vehicle is equipped with spark plug wires (as opposed to a coil-on-plug system), the wires should be replaced at the same time. This may increase the cost of your repair.
It is possible that when doing a spark plug replacement, your vehicle may also need additional parts like ignition coils, this will add to the repair cost.
Some engines require that the intake manifold be removed while replacing spark plugs. This may increase the parts and labor cost for the repair.
Leaking valve cover gaskets, which have let oil get in contact with the spark plugs, coils or wires, may be the cause of ignition system issues. Valve cover gaskets will need to be replaced in addition to the spark plugs, wires or coils. This will add to the repair cost.

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William

30 years of experience

377 reviews

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William

30 years of experience

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by Tabatha Ochoa

STS 2007 - Spark Plugs - Phoenix, AZ

He came to the first appointment explained what was happening he was able fix and get me a quote for the issue I had and scheduled me quick for the other issue I had was able to explain with my certain items were not needed even though online portal stated was needed. Only paid for the services required to fix the issue. He kept in contact with me to advise on the repair status and the final result. Nice to have the mechanic come to you. Would recommend William very courteous.

Bob

27 years of experience

43 reviews

Bob

27 years of experience

by Daibo Zhang

STS 2007 - Spark Plugs - San Diego, CA

Thank you for your help!

Mostafa

15 years of experience

47 reviews

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Mostafa

15 years of experience

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by Ivon Telemaque

STS 2005 - Water Pump - Powder Springs, GA

Mostafas Was very professional. Got the job done well before time. I highly recommend him

Ben

34 years of experience

1419 reviews

Ben

34 years of experience

by Selena Mosley

STS 2006 - Battery - Houston, TX

I will be using your service again. Ben was very kind and professional. He explained everything I needed to know.

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