X4XZ PCV Valve Oil Separator for Audi A4 A5 A6 Q5 — Direct-Fit Replacement with Two Breather Hoses

The X4XZ PCV Valve Engine Crankcase Vent Valve Oil Separator is a direct-fit replacement that restores crankcase ventilation for select Audi engines, helping reduce oil carryover and maintain clean intake surfaces.

If your Audi A4, A5, A6 or Q5 is showing oil in the intake, rough idling, or increased oil consumption, a failing PCV system may be the cause. This X4XZ oil separator (OE numbers 06H103495AE, 06H103495J, 06H103495AK) is manufactured from high-temperature materials to tolerate engine heat and oil exposure and comes with two breather hoses for a straightforward swap. It replaces the factory oil separator to re-establish proper ventilation and limit hydrocarbon emissions without altering engine performance.

How does this oil separator help engine performance?

Replacing a degraded separator reduces oil mist and vapor entering the intake tract, which helps keep intake valves and throttle bodies cleaner. Cleaner intake components maintain consistent air flow and combustion characteristics.

• Prevents excessive oil carryover into intake manifold
• Reduces sludge formation on intake and valve surfaces
• Helps maintain steady idle and throttle response

Which vehicles and OE numbers does it fit?

This X4XZ unit fits many Volkswagen Group 4-cylinder and V6 engines used in Audi models; verify compatibility with your chassis and engine code before ordering. The part numbers match common factory replacements used across several Audi models.

• OE references: 06H103495AE, 06H103495J, 06H103495AK
• Compatible: Audi A4/A4 Quattro, A5/A5 Quattro, A6/A6 Quattro, Q3/Q3 Quattro, Q5/Allroad
• Confirm fit using VIN or compare to existing part visuals

What’s included and how easy is installation?

The package contains the oil separator and two breather hoses; no printed manual is included but the part is engineered for a direct replacement fit. Installation is typically a moderate DIY task for anyone comfortable with basic engine work and common hand tools.

• Included: 1 x oil separator, 2 x breather hoses
• No instruction manual included; follow OEM removal steps or a service guide
• Expected tools: sockets, screwdrivers, pliers; time: about 30–90 minutes

How durable and reliable is the X4XZ replacement?

X4XZ builds this separator from materials chosen to resist prolonged heat and oil contamination so it remains functional under typical operating conditions. The design aims to match OEM form and function while delivering long service life when installed correctly.

• Heat- and oil-resistant construction for longevity
• Engineered to restore proper PCV control and emissions handling
• Backed by X4XZ one-year product support and customer service

Who is this for: The X4XZ PCV Valve Engine Crankcase Vent Valve Oil Separator is intended for Audi owners, independent mechanics, and DIY enthusiasts who need a reliable, OE-number-matching replacement for common PCV oil separator failures. It's suited for those who want to prevent intake contamination, reduce oil consumption symptoms, and restore correct crankcase ventilation on compatible Audi A4, A5, A6, Q3 and Q5 models. Always confirm fitment against your vehicle’s VIN or the existing OEM part number before purchase.