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Porsche Spark Plug 99917022390
Genuine Porsche parts diagram
Genuine Porsche parts diagram
Genuine Porsche parts diagram
Genuine Porsche parts diagram
Genuine Porsche parts diagram
Genuine Porsche parts diagram

Porsche Spark Plug 99917022390

GENUINE PORSCHE
Availability:
Out of stock
SKU 99917022390
Sold out
$25.57 - $25.57
$25.57
$25.57 - $25.57
$25.57
CALIFORNIA WARNING

Handling passenger or off-highway motor vehicle parts can expose you to chemicals such as phthalates and lead, which can cause cancer and reproductive harm. To minimize exposure, service the vehicle in a well-ventilated area, wear gloves, and wash your hands. For more information see www.P65Warnings.ca.gov/motor-vehicle-parts.

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The spark plug is a critical component to the proper running engine. In a conventional gasoline engine, the air fuel mixture is ignited by the spark plug to drive the piston down and convert this energy to horsepower. If your spark plugs aren’t in good shape, this crucial process can be severely hindered to the point of power loss, hesitation, misfires, and poor start up performance. Typical service schedule for standard copper tip spark plugs is between 10,000 and 30,000 miles. Iridium plugs have a more durable (but weaker) electrode that can last upwards of 60,000 miles, and platinum plugs can be rated to go as far as 100,000 miles before the electrode is spent. When replacing spark plugs, be sure to abide by the part numbers in your owner’s manual for best performance, and always use dielectric grease to make a sealed and secure electrical connection.

  • Part can be found as reference #3 in illustration.
  • Fitment Notes: 2005-08. 2006-08.

This part also goes by the following cross reference.

Cross Reference Part Number:

Fits These Vehicles 32 applications
Porsche
Make Model Engine Years
Porsche 911Carrera 3.6H6 2002–2008
Porsche 911Carrera 4 3.6H6 2002–2008
Porsche 911Carrera S 3.8H6 2005–2008
Porsche 911Carrera 4S 3.6H6 2002–2005
Porsche 911Carrera 4S 3.8H6 2006–2008
Porsche 911Targa 3.6H6 2002–2005
Porsche 911Targa 4 3.6H6 2007–2008
Porsche 911Targa 4S 3.8H6 2007–2008
Porsche 911GT3 3.6H6 2006–2006
Porsche 911GT3 RS 3.6H6 2005–2006
Porsche 911Targa 4 3.6H6 2005–2006
Porsche 911Targa 4S 3.6H6 2005–2006
Porsche 911Turbo S 3.6H6 2006–2008
Porsche 911GT3 3.8H6 2006–2006
Porsche 911GT3 RS 3.8H6 2005–2006
Porsche 911Targa 4 3.8H6 2005–2006
Porsche 911Targa 4S 3.8H6 2005–2006
Porsche 911Turbo S 3.8H6 2006–2008
Porsche BoxsterBase 2.7H6 2005–2008
Porsche BoxsterS 3.2H6 2005–2006
Porsche BoxsterS 3.4H6 2007–2008
Porsche BoxsterLimited Edition 2.7H6 2008–2008
Porsche BoxsterS Limited Edition 3.4H6 2008–2008
Porsche BoxsterRS 60 Spyder 3.4H6 2008–2008
Porsche BoxsterS Porsche Design 2 3.4H6 2008–2008
Porsche BoxsterLimited Edition, RS 60 Spyder, S Limited Edition 2.7H6 2005–2007
Porsche BoxsterLimited Edition, RS 60 Spyder, S Limited Edition 3.4H6 2007–2007
Porsche CaymanBase 2.7H6 2007–2008
Porsche CaymanS 3.4H6 2006–2008
Porsche CaymanBase 3.4H6 2006–2006
Porsche CayenneTurbo 4.5V8 2003–2006
Porsche CayenneTurbo S 4.5V8 2006–2006

Fitment data last updated: 2026-10-05

Fits 32 vehicle applications Check vehicle fitment before ordering View fitment

About this Spark Plug

The GENUINE PORSCHE 99917022390 spark plug ignites the air and fuel in each cylinder. Worn plugs make the ignition system work harder and can cause misfires, rough running and higher fuel consumption.

Frequently asked questions

How often should I replace spark plugs?

Follow the interval in your car's maintenance schedule. Turbocharged engines and tuned engines often need plugs replaced sooner than naturally aspirated ones.

What are the signs of worn spark plugs?

Misfires or a check-engine light, rough idle, hesitation under acceleration, harder starting, and reduced fuel economy.

Do I need to gap new spark plugs?

Many modern plugs come pre-gapped and some iridium or platinum plugs should not be adjusted. Check the gap against your car's specification and only adjust it carefully if the plug maker allows it.

Can I replace spark plugs myself?

On most engines, yes. Work on a cold engine, blow debris out of the plug wells before removing plugs, thread new plugs in by hand first, and tighten to the specified torque.

How do I make sure this spark plug fits my car?

Compare the part numbers listed on this page with the number on your old part or in your vehicle's parts catalog, and check the fitment information. If you are unsure, contact us with your VIN before ordering.

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