PCV system breather valve, 1.4/1.6 8V/16V gasoline engines (1H0907343)

Main benefits

• Crankcase pressure control: Prevents oil leaks from gaskets and intake contamination.

• Reduced emissions: Complies with Euro 3/4 regulations by recirculating gases without direct exhaust.

• Breakdown prevention: Protects turbo/intercooler from emulsified oil contamination.

• Easy diagnosis: Failure symptoms: high oil consumption, blue smoke, loss of power.

Technical characteristics

Function: Unidirectional diaphragm valve that opens at a differential pressure of ~3-5 mbar in the crankcase.
Connections: Intake hose (Ø19mm) + ventilation hose (Ø15mm).
Material: Technical plastic + HNBR diaphragm resistant to 120°C oil.
Service life ~100,000 km or 5 years (replace timing belt kit).

Confirmed compatibility

1.4/1.6 8V/16V gasoline engines on PQ34 platform:
Volkswagen: Golf IV (1J) 1.4 75hp, 1.6 100hp 2001-2005
SEAT: Ibiza II/III (6K/6L) 1.4/1.6 2000-2008
Audi: A2 1.6 2001-2005
Skoda: Fabia I 1.4/1.6 2001-2007
Interval: 120,000 km or timing belt kit.

Replacement instructions

1. Disconnect negative battery terminal.

2. Locate PCV valve on the intake manifold (usually black plastic Ø25mm).

3. Disconnect hoses (pliers if hardened).

4. Remove retaining clip/screw.

5. Install new one with oil-lubricated hoses. Torque: 5 Nm.

Frequently asked questions (FAQ)

Gasoline or diesel?
Gasoline exclusively (diesel uses direct EGR).

Where is it located?
Intake manifold or valve cover (look for thick crankcase hoses).

Symptoms of failure?
Blue smoke at idle, oil consumption 0.5L/1000km, loss of power.

Does it come with a gasket?
No, reuse O-ring hoses or a specific kit.

Technical specifications

• Reference: 1H0907343 (VAG gasoline)

• Function: PCV crankcase ventilation valve

• Opening pressure: 3-5 mbar
  

Original VAG valve that prevents turbo/injection failures due to crankcase contamination (~€1500). Economical shipping.

Add the PCV valve 1H0907343 VAG and prevent oil consumption blue smoke!