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Porsche Spark Plug 99917017990 – Genuine Porsche

GENUINE PORSCHE
Disponibilité:
Rupture de stock
UGC 99917017990
Épuisé
$5.96 - $5.96
$5.96
$5.96 - $5.96
$5.96
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.

  • Replaces: 999-170-038-90, 999-170-050-90, 999-170-051-90, 999-170-052-90, 999-170-054-90, 999-170-055-90, 999-170-056-90, 999-170-110-90, 999-170-111-90, 999-170-124-90, 999-170-135-90, 999-170-137-90, 999-170-138-90, 999-170-139-90, 999-170-165-90, 999-170-166-90

This part also goes by the following cross reference.

Cross Reference Part Number: 99917003890, 999-170-038-90, 99917005090, 999-170-050-90, 99917005190, 999-170-051-90, 99917005290, 999-170-052-90, 99917005490, 999-170-054-90, 99917005590, 999-170-055-90, 99917005690, 999-170-056-90, 99917011090, 999-170-110-90, 99917011190, 999-170-111-90, 99917012490, 999-170-124-90, 99917013590, 999-170-135-90, 99917013790, 999-170-137-90, 99917013890, 999-170-138-90, 99917013990, 999-170-139-90, 99917016590, 999-170-165-90, 99917016690, 999-170-166-90, N01781123, N01781132

Fits These Vehicles 24 applications
Porsche
Make Model Engine Years
Porsche 944Base 2.7L4 1989–1989
Porsche 944S2 3.0L4 1989–1991
Porsche 944Turbo 2.5L4 1989–1990
Porsche 924Base 2.0L4 1977–1979
Porsche 911Base 2.0H6 1965–1968
Porsche 911L 2.0H6 1968–1968
Porsche 911T 2.0H6 1969–1969
Porsche 911T 2.2H6 1970–1971
Porsche 911T 2.3H6 1972–1973
Porsche 911E 2.0H6 1969–1969
Porsche 911E 2.2H6 1970–1971
Porsche 911E 2.3H6 1972–1973
Porsche 911S 2.0H6 1967–1967
Porsche 911S 2.0H6 1969–1969
Porsche 911S 2.2H6 1970–1971
Porsche 911S 2.3H6 1972–1973
Porsche 911SC 3.0H6 1978–1983
Porsche 911Turbo 3.3H6 1978–1979
Porsche 911Turbo 3.3H6 1981–1983
Porsche 912Base 1.6H4 1965–1969
Porsche 914Base 1.7H4 1970–1973
Porsche 914Base 1.8H4 1974–1975
Porsche 914Base 2.0H4 1973–1976
Porsche 914914-6 2.0H6 1970–1972

Fitment data last updated: 2026-10-02

Fits 24 vehicle applications Check vehicle fitment before ordering View fitment

About this Spark Plug

The GENUINE PORSCHE 99917017990 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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