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Engine Oil Separator O-Ring (21x4mm)

Engine Oil Separator O-Ring (21x4mm)

GENUINE PORSCHE
Availability:
Out of stock
SKU 99970763540
Sold out
$4.95 - $4.95
$4.95
$4.95 - $4.95
$4.95
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 Genuine Porsche Engine Oil Separator Seal part number 99970763540 / 999 707 635 40 is a high-quality replacement part designed specifically for Porsche models. This product is manufactured with precision to ensure perfect fit and uncompromised performance.

This Engine Oil Separator Seal offers a wide range of benefits, including reliable sealing and efficient functioning of the oil separator. It plays a crucial role in keeping the engine running smoothly by preventing the oil from entering the combustion chamber. The seal is made from top-quality materials, which makes it highly durable and long-lasting.

The Genuine Porsche Engine Oil Separator Seal part number 99970763540 / 999 707 635 40 offers a perfect fit for various Porsche models, ensuring optimal performance and reliability. It is specifically designed to meet the highest standards of quality and function, making it an essential component for every Porsche owner.

Whether you are a professional mechanic or a car enthusiast, this product is easy to install and use. Simply replace the old seal with this new one, and enjoy the benefits of a reliable and efficient oil separator.

In summary, the Genuine Porsche Engine Oil Separator Seal part number 99970763540 / 999 707 635 40 is an essential replacement part that offers reliable sealing, efficient functioning, and long-lasting durability. It is a must-have for every Porsche owner who wants to keep their engine running smoothly and efficiently.

Brand Part #
Brand Part #
Porsche 999 707 635 40 / 99970763540

This part also goes by the following cross reference.

Cross Reference Part Number:

Fits These Vehicles 27 applications
Porsche
Make Model Engine Years
Porsche 911Carrera 3.4H6 2012–2016
Porsche 911Carrera 4 3.4H6 2013–2016
Porsche 911Carrera S 3.8H6 2012–2016
Porsche 911Carrera 4S 3.8H6 2013–2016
Porsche 911Targa 4 3.4H6 2014–2016
Porsche 911Targa 4S 3.8H6 2014–2016
Porsche 911Turbo 3.8H6 2014–2018
Porsche 911Turbo S 3.8H6 2014–2018
Porsche 911Carrera GTS 3.8H6 2015–2016
Porsche 911Carrera 4 GTS 3.8H6 2015–2016
Porsche 911Targa 4 GTS 3.8H6 2016–2016
Porsche 91150th Anniversary Edition 3.8H6 2014–2014
Porsche 911Turbo S Exclusive Series 3.8H6 2018–2018
Porsche 911GT2 RS 3.8H6 2018–2018
Porsche 911 3.8H6 2010–2011
Porsche 911 3.8H6 2019–2019
Porsche 911 3.0H6 2019–2019
Porsche BoxsterBase 2.7H6 2013–2016
Porsche BoxsterS 3.4H6 2013–2016
Porsche BoxsterGTS 3.4H6 2015–2016
Porsche BoxsterBlack Edition 2.7H6 2016–2016
Porsche BoxsterSpyder 3.8H6 2016–2016
Porsche CaymanBase 2.7H6 2014–2016
Porsche CaymanS 3.4H6 2014–2016
Porsche CaymanGTS 3.4H6 2015–2016
Porsche CaymanBlack Edition 2.7H6 2016–2016
Porsche CaymanGT4 3.8H6 2016–2016

Fitment data last updated: 2026-10-03

Fits 27 vehicle applications Check vehicle fitment before ordering View fitment

About this Crankcase Ventilation (PCV)

The GENUINE PORSCHE 99970763540 is part of the crankcase ventilation (PCV) system, which routes gases that escape past the pistons back into the intake to be burned, and separates oil out of them. When the system fails, crankcase pressure and oil consumption can rise quickly.

Frequently asked questions

What does the crankcase ventilation system do?

It relieves pressure inside the engine by drawing blow-by gases back into the intake, while an oil separator or valve keeps oil out of the intake. Correct crankcase pressure protects seals and gaskets.

What are the signs of a failed PCV valve or oil separator?

A whistling or howling noise at idle, rough idle, lean-running fault codes, higher oil consumption, oil leaks from seals, blue smoke, or suction at the oil filler cap strong enough to hold the cap down.

What should I replace along with it?

Crankcase vent hoses become brittle with heat and age, so inspect and replace cracked hoses and fittings at the same time. On many European engines, the valve cover and separator are serviced together.

Can I replace PCV components myself?

Many parts are accessible with basic tools, though some separators sit under the intake manifold. Handle old plastic fittings carefully, as they can break during removal.

How do I make sure this crankcase ventilation part 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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