Mazda CX-9 Spark Plug Replacement at your home or office.

Our mobile technicians offer services 7 days a week. Upfront and transparent pricing.

Select your location and
vehicle for an upfront price

Average rating from customers who
received a Spark Plugs Replacement.
Learn More

$118.27 - $326.46

Price range for all vehicles

YourMechanic Benefits

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Average rating from customers who
received a Spark Plugs Replacement.
Learn More


Spark Plug Replacement Estimate for Mazda CX-9

Mazda CX-9 Spark Plug Replacement costs $261 on average.

CarServiceEstimateShop/Dealer Price
2007 Mazda CX-9V6-3.5LService typeSpark Plug ReplacementEstimate$482.94Shop/Dealer Price$592.94 - $862.74
2018 Mazda CX-9L4-2.5L TurboService typeSpark Plug ReplacementEstimate$231.54Shop/Dealer Price$279.88 - $370.44
2010 Mazda CX-9V6-3.7LService typeSpark Plug ReplacementEstimate$476.94Shop/Dealer Price$583.08 - $849.98
2017 Mazda CX-9L4-2.5L TurboService typeSpark Plug ReplacementEstimate$298.95Shop/Dealer Price$367.62 - $542.29
2015 Mazda CX-9V6-3.7LService typeSpark Plug ReplacementEstimate$304.34Shop/Dealer Price$373.90 - $521.34
2012 Mazda CX-9V6-3.7LService typeSpark Plug ReplacementEstimate$467.94Shop/Dealer Price$573.18 - $839.39
2011 Mazda CX-9V6-3.7LService typeSpark Plug ReplacementEstimate$467.94Shop/Dealer Price$569.70 - $833.30
2013 Mazda CX-9V6-3.7LService typeSpark Plug ReplacementEstimate$464.70Shop/Dealer Price$570.18 - $834.76
Show example Mazda CX-9 Spark Plug Replacement prices

Service

What are spark plugs and how do they work?

A spark plug is a precision-manufactured electrical device that passes a very high voltage pulse across two electrodes. The ignition system in your car generates very high voltage, as much as 50,000 volts. As that high voltage flows to each plug, the path to ground is interrupted by the spark plug gap, which varies depending on the engine. The voltage is high enough to jump that gap gauge and ignites the air-fuel mixture created. Like all engine components that operate in synchrony, the spark at each spark plug is timed to maximize power and efficiency and also to keep engine emissions as low as possible.

Spark plugs-MATROX-1

When to replace spark plugs:

  • Vehicle maintenance schedule. Spark plugs are a routine maintenance item, and should always be replaced according to the factory maintenance schedule.

If a spark is found to be faulty, it should be replaced, since it can cause any number of unfavorable symptoms, such as:

  • Difficulty starting your car.
  • Flashing check engine light.
  • 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, it is common to replace them all at that time.

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. Not all the steps below apply to all cars, but the replacement procedure is as follows:

  • Determine correct plug based on OEM catalog, VIN, or underhood sticker.
  • Remove plastic engine cover, if applicable. Remove all components on top of the plug including coil-on-plug assemblies, spark plug wires, and so forth.
  • Unthread plug while the engine is cold.
  • Inspect removed plug to look for clues indicating any engine mis-operation exists; such as oil burning, excessively rich mixture, pre-ignition damage etc. Inform owner of any found unusual conditions.
  • Verify part numbers of new spark plugs. Adjust the gap to specification (if adjustable type), and install new plugs using a calibrated inch-pound torque wrench. Adjust torque if anti-seize is required on plug threads.
  • Finally, a road test of the vehicle to confirm normal operation.

Is it safe to drive with a spark plugs problem?

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. Generally, plug misoperation will not cause the engine to fail to run, but in cases of extreme wear, you may experience a limitation in the speed at which you can operate. If the maintenance schedule says the plugs should be replaced, it is best to do so promptly. Regardless of the age of the plugs, or elapsed mileage, if the engine misfires or runs poorly, the plugs should be inspected for defects.

When replacing spark plugs 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.
  • The correct spark plug is critical for proper operation of your engine. Do not allow substitute part numbers. Always use brand name parts.
  • Never remove spark plugs from a hot engine.
  • Anti-seize compounds require that the OEM torque rating be adjusted downward. OEM torque assumes clean, dry spark plug threads with no lubricants.
  • Plugs should always be promptly replaced per the manufacturer maintenance schedule even if they appear to be working perfectly. If you delay replacement, the spark plug threads may weld themselves to the aluminum cylinder head, thus making later replacement very difficult and costly if the aluminum threads are damaged.
  • If your vehicle is equipped with spark plug wires (as opposed to a coil-on-plug system), the wires should be tested for electrical resistance at 100,000 miles or just replaced outright with new, name brand wires.

Fast and easy service at your home or office

GET A QUOTE FOR YOUR CAR

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mazda mechanics

Real customer reviews from Mazda owners like you.

Excellent Rating


YourMechanic Mazda CX-9 Spark Plugs Replacement Service

Average Rating

5/5

Number of Reviews

7

Rating Summary
7
0
0
0
0
7
0
0
0
0

Joshua

5 years of experience
20 reviews
Joshua
5 years of experience
Josh did a great job. Would hire him again
2009 MAZDA CX-9 - SPARK PLUG REPLACEMENT - MORRISON, COLORADO

Jose

13 years of experience
258 reviews
Jose
13 years of experience
Jose replaced the spark plugs and ignition cables on my SUV. He also did an all around check on the vehicle and provided a report on the status of the vehicle that was sent to my email. He did a great job and was very professional. Would definetely request him for future instances.
2007 MAZDA CX-9 - SPARK PLUGS - WESTON, FLORIDA

David

10 years of experience
128 reviews
David
10 years of experience
David was great! He showed up on time and the car has never ran better.
2010 MAZDA CX-9 - SPARK PLUGS - ALPHARETTA, GEORGIA

Brandon

17 years of experience
570 reviews
Brandon
17 years of experience
This was my first experience with Your Mechanic, and I have to say that it was great all the way around. Brandon was punctual, professional, and friendly. And he got the work done faster than the original estimate. If you need work done on your car, skip the shop and save some money. Have Brandon come fix your car.
2011 MAZDA CX-9 - SPARK PLUGS - APOPKA, FLORIDA

Excellent Rating


YourMechanic Mazda CX-9 Spark Plugs Replacement Service

Average Rating

5/5

Number of Reviews

7

Rating Summary
7
0
0
0
0
7
0
0
0
0
Red-stars EXCELLENT RATING ON
Number of Mazda CX-9 Spark Plugs Replacement services completed
77+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mazda MECHANICS
700+
experts on our platform

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com