PA66 Heat-Resistant Crankcase Breather Check Valve OEM Replacement for VW Audi EA211 Engines to Prevent Oil Consumption

The crankcase breather check valve (PCV check valve) with OEM number 04E 103 175 M is a critical one-way valve that regulates crankcase pressure in the VW-Audi-SEAT-Škoda EA211 engine family, specifically the 1.0L (three-cylinder), 1.2L and 1.4L TSI/TFSI petrol engines.

This valve is located on the passenger side of the cylinder block (RH), connecting the crankcase breather hose to the intake manifold. Its role is to ensure that crankcase gases are drawn into the intake manifold only when intake vacuum is present, while preventing pressurized air from flowing back into the crankcase.

This crankcase breather check valve directly replaces the factory valve in the following configurations:

Volkswagen: Golf Mk7, Golf Mk8, Passat B8, Polo, Tiguan, Jetta VI, Caddy, Touran, Sharan, Up!

Audi: A3 8V, A1 8X, Q2, Q3, A4 B9

SEAT: Leon, Ibiza, Ateca, Arona

Škoda: Octavia, Yeti, Fabia, Rapid, Kodiaq

The EA211 engine code range includes: CBZA, CBZB, CHZB, CJZA, CJZB, CJZC, CZCA, CZDA, CZEA, CZTA, CZTC, CZTB, DJHA, DKLC, DKRF. Confirm your engine code before ordering.

A failing PCV check valve typically reveals itself through:

• Rough idle and engine hesitation
• Increased oil consumption (0.5 litres per 1,000 km or more)
• Oil smoke from the exhaust on engine overrun (deceleration)
• Hissing or whistling noises from the engine bay
• Oil residue around the PCV valve or breather hoses
• Persistent check engine light and lean running codes

Diagnosis is straightforward: run the engine at idle and place a finger over the open end of the PCV valve; you should feel intake manifold vacuum. If not, or if the valve is obviously cracked or deformed, it has failed.

• Precision One-Way Check Valve Design: Permits crankcase gases to flow into intake manifold when vacuum is present, prevents pressurized air from flowing back
• PA66 (Nylon) Construction: Heat and wear resistant material retains shape and sealing properties
• Dry Fit Installation: No sealants required, uses rubber O-ring for sealing
• Corrects Rough Idle and Stalling: Restores correct fuel-air mixture
• Reduces Oil Consumption: Restores proper crankcase evacuation
• Eliminates Oil Smoke: Removes smoke at source during deceleration
• Comprehensive OE Interchange Coverage: Cross-references to multiple OE numbers
• ISO 9001 / IATF 16949 Certified Manufacturing: Highest automotive quality standards

When to replace this PCV valve:

Installation steps (professional reference):

1. Ensure the engine is cool
2. Disconnect the PCV hose from intake manifold and valve
3. Remove PCV valve from cylinder block RH (secured by single M6×35 screw)
4. Inspect the O-ring and replace if damaged
5. Compare new valve with old unit for alignment
6. Install new valve with fresh O-ring (tighten to 8-10 Nm)
7. Reconnect PCV hose ensuring clip engages correctly
8. Start engine and check for leaks
9. Verify idle quality

• Individual packaging: Sealed in anti-static VCI bag, foam-lined carton
• Carton dimensions: Approximately 8 × 7 × 5 cm
• Net weight: 0.02 kg; Gross weight: 0.05 kg
• Master carton: 200 units per export carton
• Lead time: 3-7 working days for stock orders
• Minimum order quantity: 10 pieces
• Shipping methods: FedEx, UPS, DHL for samples; sea freight for bulk
• H/S Code: 8481.30

The crankcase breather check valve 04E 103 175 M is an OE-specification replacement for the PCV system on VW-Audi-SEAT-Škoda EA211 engines (1.0 TSI, 1.2 TSI, 1.4 TSI). It is a one-way valve that prevents boost pressure from entering the crankcase while allowing crankcase gases to be drawn into the intake manifold.

This valve fits Golf Mk7, Audi A3 8V, Passat B8, Octavia, Leon, Yeti, and numerous other EA211-powered vehicles. It addresses rough idle, excessive oil consumption and oil smoke on overrun.