T25,G2 Crankcase Breather Hose - 1600cc + 1700cc Diesel Engines

This crankcase breather hose is a direct replacement for the original hose used on Volkswagen 1.6 and 1.7 diesel engines. Its role is to vent excess crankcase pressure and blow-by gases from the engine back into the intake system, where they can be safely reburned. This controlled ventilation helps reduce oil leaks, prevents pressure build-up in the crankcase, and supports stable idle and clean running.

Over time, original breather hoses can harden, crack, or collapse due to heat and oil vapour exposure. A damaged hose may cause oil misting around the engine, vacuum leaks, rough idle, or increased crankcase pressure. Replacing the hose restores proper crankcase ventilation and helps protect seals and gaskets from premature failure.

Manufactured to the correct diameter and length for listed applications, this hose ensures a secure fit and reliable long-term service on classic VW diesel models.

Technical details

• Part type: Crankcase breather hose

• Engine type: Diesel

• Function: Crankcase ventilation / blow-by gas return

Related parts to consider

• Breather valve or oil separator (if fitted)

• Hose clips / clamps

• Rocker cover gasket (if oil contamination is present)

Vehicle Fitment Summary

Volkswagen Type 25 / T3

• 1.6 Diesel 50 PS: 1981–1987 (Bus, Van, Platform/Chassis)

• 1.7 Diesel 57 PS: 1984–1992 (Bus, Van, Platform/Chassis)

Volkswagen Golf II

• 1.6 Diesel 54 PS: 1983–1991 (Hatchback)

Volkswagen Jetta II

• 1.6 Diesel 54 PS: 1984–1991 (Saloon)

Volkswagen Passat (B2)

• 1.6 Diesel 54 PS: 1980–1988 (Hatchback, Saloon & Estate)