Oil Separator Engine Crankcase Vent Valve for Audi A4 A5 TT VW Golf Passat 14-18

This Oil Separator / Engine Crankcase Vent Valve is a direct-replacement emissions and pressure control component compatible with 2014–2018 Audi A4, A5, TT, and Volkswagen Golf and Passat models.

Product Overview

This crankcase vent valve (oil separator) manages blow-by gases, separating oil mist from air and returning oil to the sump while routing clean air back to the intake. Designed for specific VAG 2.0T engines, the oil separator helps prevent oil consumption, intake valve carbon buildup, and rough idle. It is a common service part for Audi and VW owners experiencing PCV-related issues.

Key Features & Performance

• Precision diaphragm and spring mechanism maintains consistent crankcase pressure
• Integral oil separation cyclone effectively removes oil droplets from vapor
• Direct-fit replacement matches OE mounting points and hose connections
• High-temperature resistant polymer body withstands engine bay heat cycles
• Includes pre-installed gasket for a leak-free seal

Fitment & Compatibility

• 2014–2018 Audi A4 (B8/8.5) 2.0T
• 2014–2018 Audi A5 (B8/8.5) 2.0T
• 2014–2018 Audi TT (8S) 2.0T
• 2014–2018 Volkswagen Golf / GTI (Mk7) 1.8T/2.0T
• 2014–2018 Volkswagen Passat (B7) 1.8T/2.0T

Common Uses

• Replacing a failed original oil separator causing oil leaks or high crankcase pressure
• Solving rough idle, misfire, or lean codes (P0171, P0507)
• Reducing excessive oil consumption and smoke from exhaust
• Preventive maintenance during intake manifold or water pump service

Technical Specifications

• Function: Crankcase ventilation and oil mist separation
• Material: Heat-stabilized engineered plastic
• Installation: Bolt-on, replaces factory unit
• Included Parts: Valve assembly with integrated diaphragm and gasket

Frequently Asked Questions

Q: What are signs that this oil separator needs replacement? A: Common symptoms include a rough idle, oil around the valve cover, a check engine light with PCV-related fault codes, and increased oil consumption.

Q: Does this fit a 2016 Audi A5 Quattro? A: Yes, it fits 2014–2018 Audi A5 models with the 2.0T engine, including Quattro versions. Verify your engine type before ordering.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.