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Genuine Porsche Spark Plug 999 170 237 90
Genuine Porsche parts diagram
Genuine Porsche parts diagram
Genuine Porsche Spark Plug 999 170 237 90
Genuine Porsche parts diagram
Genuine Porsche parts diagram

Genuine Porsche Spark Plug 999 170 237 90

GENUINE PORSCHE
Availability:
5+ in stock, ready to be shipped

Ships same or next business day

SKU 999-170-237-90
$57.23 - $57.23
$57.23
$57.23 - $57.23
$57.23
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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GENUINE PORSCHE

Spark Plug

This product also goes by these part numbers: 999 170 237 90, 99917023790, 999-170-237-90

This part also goes by the following cross reference.

Cross Reference Part Number: 99917023790

Fits These Vehicles 2 applications
Porsche
Make Model Engine Years
Porsche 911GT3, GT3 RS, R 3.8H6 2014–2016
Porsche 911GT3, GT3 RS, R, Speedster 4.0H6 2016–2019

Fitment data last updated: 2026-07-29

Fits 2 vehicle applications Check vehicle fitment before ordering View fitment

About this Spark Plug

The GENUINE PORSCHE 999-170-237-90 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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