Infiniti QX50 Spark Plug Replacement at your home or office.

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

Estimate price near me

Service Location

Customer Ratings

(13)

Included for free with this service

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.

Customer Ratings

(13)

Spark Plug Replacement Service

How much does a Spark Plug Replacement cost?

On average, the cost for a Infiniti QX50 Spark Plug Replacement is $288 with $106 for parts and $182 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2019 Infiniti QX50L4-2.0L TurboService typeSpark Plug ReplacementEstimate$413.90Shop/Dealer Price$471.68 - $634.49
2021 Infiniti QX50L4-2.0L TurboService typeSpark Plug ReplacementEstimate$402.19Shop/Dealer Price$457.67 - $618.76
2016 Infiniti QX50V6-3.7LService typeSpark Plug ReplacementEstimate$655.92Shop/Dealer Price$766.71 - $1087.37
2014 Infiniti QX50V6-3.7LService typeSpark Plug ReplacementEstimate$1139.12Shop/Dealer Price$1350.75 - $1969.57
2015 Infiniti QX50V6-3.7LService typeSpark Plug ReplacementEstimate$1139.12Shop/Dealer Price$1356.43 - $1979.50
2017 Infiniti QX50V6-3.7LService typeSpark Plug ReplacementEstimate$719.88Shop/Dealer Price$844.66 - $1211.78
2020 Infiniti QX50L4-2.0L TurboService typeSpark Plug ReplacementEstimate$416.79Shop/Dealer Price$472.51 - $633.78
Show example Infiniti QX50 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.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Infiniti mechanics

Real customer reviews from Infiniti owners like you.

Excellent Rating

(13)

Rating Summary
13
0
0
0
0
13
0
0
0
0

Ronnaldo

12 years of experience
69 reviews
Ronnaldo
12 years of experience
Infiniti QX50 V6-3.7L - Battery - Jonesboro, Georgia
Very professional, knowledgeable, on time and friendly! I'll use this service again just based on my first experience.

Jason

33 years of experience
617 reviews
Jason
33 years of experience
Infiniti QX50 V6-3.7L - Brake Pads Replacement (Front) - San Carlos, California
Very professional

Theodore

17 years of experience
1794 reviews
Theodore
17 years of experience
Infiniti QX50 V6-3.7L - Oil Change - Issaquah, Washington
Theodore was very professional and even helped look at my second car and recommended some updates to the upcoming appointment.

Jarius

22 years of experience
49 reviews
Jarius
22 years of experience
Infiniti QX50 V6-3.7L - Car Battery Replacement - Greensboro, North Carolina
Exactly on time! Professional, friendly and completed the job efficiently.

Excellent Rating

(13)

Rating Summary
13
0
0
0
0
13
0
0
0
0
Number of Infiniti QX50 services completed
143+
services done by our mechanics
TOTAL NUMBER OF EXPERT Infiniti MECHANICS
1000+
experts on our platform

Recent articles & questions

P2097 OBD-II Trouble Code: Post Catalyst Fuel Trim System Too Rich Bank 1
P2097 code definition P2097 is a general OBD-II diagnostic trouble code that indicates a fault with the post catalyst fuel trim system...
How to Care for the Paint on Your Car
Caring Caring for the paint job on your car is one of the best ways to keep your car looking great all year round. Regular washing and cleaning, followed by drying, polishing (https://www.yourmechanic.com/article/how-to-polish-a-car-by-olivia-marsh), and waxing, adds a protective coating over...
How to Recharge Your Car Air Conditioning
Car AC refrigerant has to be recharged occasionally. Add more refrigerant to your AC system to keep your car cool in hot weather.

Oil changed from 10w-30 to 5w-20 and there were loud clunking sounds in the engine

No, this is not because they put the wrong weight oil in - it sounds like they forgot to put oil in at all! Or possibly they left the drain plug loose and the oil dumped out as you drove...

2006 ram1500 will not go into gear or no brake lights

In your application, the brake light switch may be integral to the circuit that communicates with the anti-lock brake system as well as the shifter and ignition locks. If the brake light switch has failed, that circuit failure can prevent...

I have an issue with my 2008 hyundai Santa Fe, when I accelerate there is a loud noise that sounds like an airplane jet engine noise before its about to take off and continues the entire time I'm driving which to me sounds like a purge valve on the engine /canister is bad however when I let off the accelerator, no brakes applied at all and I hear this bad crunching grinding sound and tapping sound..what could it be? It is so annoying!!!

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 (855) 347-2779 · hi@yourmechanic.com