Beginning April 5th , Fridays hours will be from 7:30am to 4:30 pm

Berkeley Auto Repair

Mon - Thu: 7:30 AM - 5:15 PM
Fri: 7:30 AM - 4:30 PM

What Are Spark Plugs?

A combustion engine needs three essentials to start and operate: gas, air, and a spark. Spark plugs are the little devices that provide the necessary spark from the pistons to ignite the air and fuel mixture to help your engine run. When they are improperly installed or worn out, your vehicle will stop running.


Spark plugs are one of those vehicle components that should be checked on a regular basis. When you bring your car, SUV, or truck to our auto repair shop for service, we can keep you updated on the condition of your spark plugs and replace them before they can become an inconvenience to you. 

FAQs on Spark Plugs

How many spark plugs are in an engine?

A four-cylinder engine has four spark plugs, but a V8 has eight.

What are spark plugs made of?

Copper, nickel, iridium, and platinum are some of the most common elements in spark plugs. There are varieties, and you should follow what your manufacturer recommends.

How long do spark plugs last?

Spark plugs can last anywhere between 30,000 to almost 100,000 miles depending on the quality and material it is made of.

What are the signs of failing spark plugs?

  • Trouble with car starts
  • Rough idling
  • Engine pinging or knocking
  • Poor gas mileage

Should you change them all at once?

Yes, it is strongly recommended that you change all the plugs at once to assure that everything works properly. Plus, who wants to make multiple visits to the repair shop for spark plugs?

What happens if you neglect spark plugs?

Defective spark plugs can result in the experience of the failing signs above. Eventually, your car may not start at all. Plus, your engine may also experience accelerated wear. 


If you believe your vehicle is due for spark plug replacement, we welcome you to call or bring your vehicle to The Model Garage today!

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