Audi 100 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

(2,141)

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

(2,141)

Spark Plug Replacement Service

How much does a Spark Plug Replacement cost?

On average, the cost for a Audi 100 Spark Plug Replacement is $168 with $28 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1994 Audi 100V6-2.8LService typeSpark Plug ReplacementEstimate$220.28Shop/Dealer Price$242.90 - $296.59
1990 Audi 100L5-2.3LService typeSpark Plug ReplacementEstimate$202.19Shop/Dealer Price$219.45 - $264.01
1992 Audi 100V6-2.8LService typeSpark Plug ReplacementEstimate$222.19Shop/Dealer Price$244.49 - $304.08
1993 Audi 100V6-2.8LService typeSpark Plug ReplacementEstimate$211.27Shop/Dealer Price$230.84 - $282.24
1991 Audi 100L5-2.3LService typeSpark Plug ReplacementEstimate$202.19Shop/Dealer Price$222.07 - $268.59
Show example Audi 100 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 Audi mechanics

Real customer reviews from Audi owners like you.

Excellent Rating

(2,141)

Rating Summary
1,984
82
16
9
50
1,984
82
16
9
50

Sebastian

5 years of experience
6 reviews
Sebastian
5 years of experience
A4 Quattro 2004 - Car is not starting - West Palm Beach, FL
Very helpful ❗️To me and my car would recommend to friends

Mike

25 years of experience
79 reviews
Mike
25 years of experience
Q3 Quattro 2016 - Strut Assembly - Ann Arbor, MI
My car was troublesome for Mike but he stuck to it without complaining. He’s a good man.

Juan

10 years of experience
47 reviews
Juan
10 years of experience
A3 Quattro 2015 - Brake Pads - Vallejo, CA
Was on time and did a great job.

Adrian

11 years of experience
26 reviews
Adrian
11 years of experience
TT Quattro 2001 - Battery - Atlanta, GA
Extremely satisfied

Excellent Rating

(2,141)

Rating Summary
1,984
82
16
9
50
1,984
82
16
9
50
Number of Audi services completed
23551+
services done by our mechanics
TOTAL NUMBER OF EXPERT Audi MECHANICS
800+
experts on our platform

Recent articles & questions

How to Customize a Car
Usually, Usually, you buy a vehicle because it fits your needs and your budget. When you want a little more personalization than your stock vehicle is equipped with, however, you can customize it in several different ways. Popular customizations include:...
Industry News for Automotive Techs: September 3-9
A remote assist J2534 tool, Honda's new pedestrian detection technology, and advancement of variable superchargers are some big stories this week.
How Long Does a Center Support Bearing Last?
The The center support bearing is normally on mid-size or heavy-duty vehicles, such as trucks. The purpose of this part is to help support the longer drive shaft that these vehicles depend on. The drive shaft is divided into two...

my husband rotated my tires yesterday, today my steering wheel shakes

Hello. This could be a variety of potential issues. First, I would suggest checking the tire pressure (https://www.yourmechanic.com/article/how-do-i-check-my-tire-pressure) in all four tires to be sure they all have the proper air pressure as on tire that may be out of...

Why would there be smoke coming from under my hood and now my car does not shift 2001 Honda Civic

Hi there. It seems that the transmission fluid is leaking. Check the cooler hoses from the transmission to the radiator on the car and see if they are leaking. A leak on the transmission will cause the vehicle to not...

My car is overheating changed temp sensor, radiator, radiator cap, waterpump, thermastat housing and [thermostat](/topics-thermostat-jeep/). Burped my vehicle theres no leakes still over heating fan works heater doesn't though what could be the problem

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