G3 Water Hose - Oil Cooler To Water Pump - 1.9 Diesel

This coolant hose connects the engine oil cooler to the coolant pump on Volkswagen 1.9 diesel engines. It allows engine coolant to circulate through the oil cooler, regulating oil temperature and helping maintain stable engine operating conditions.

Over time these hoses can harden, crack, or swell due to heat and oil exposure, leading to coolant leaks or reduced cooling efficiency. Replacing this hose restores proper coolant flow between the oil cooler and water pump, protecting both engine oil and coolant temperatures.

Manufactured to the correct shape and diameter for direct fitment, this hose is ideal for maintenance, leak repair, or full cooling system refreshes on 1.9 diesel VW platforms.

Engine code compatibility

1Y (1.9 D), 1Z (1.9 TDI), AAZ (1.9 TD), AEY (1.9 SDI), AFN (1.9 TDI), AHU (1.9 TDI), ALE (1.9 TDI)

Vehicle fitment summary

VW Golf Mk3

• 1991–1999

• 1.9 Diesel / Turbo Diesel / TDI

• Hatchback & Estate

• Power outputs: 64, 75, 90, 110 PS

• Engine codes: 1Y, 1Z, AAZ, AEY, AFN, AHU, ALE

VW Golf Mk3 Cabriolet

• 1994–2002

• 1.9 Diesel / TDI

• Engine codes: 1Z, AFN

VW Vento

• 1991–1998

• 1.9 Diesel / TDI

• Power outputs: 65, 75, 90 PS

• Engine codes: 1Y, 1Z, AAZ

VW Polo Mk3 (6N)

• 1996–2001

• 1.9 Diesel / SDI / TDI

• Hatchback

• Power outputs: 57, 64, 90 PS

• Engine codes: AEY, 1Y

VW Polo Classic (6V2)

• 1995–2001

• 1.9 Diesel / TDI

• Saloon

• Power outputs: 64, 90 PS

VW Caddy Mk2 (Caddy II)

• 1995–2004

• 1.9 Diesel / TDI

• MPV / Pickup

• Power outputs: 64, 90 PS

VW Passat (B3 / B4)

• 1989–1997

• 1.9 Diesel / TD / TDI

• Saloon & Estate

• Power outputs: 68, 75, 90 PS

• Engine codes: 1Y, 1Z, AAZ

VW Sharan Mk1

• 1995–2010

• 1.9 Diesel / TDI

• Power output: 90 PS

Recommended related parts

• Oil cooler seals / O-rings

• Coolant hose clips

• Coolant (G11 / G12 as specified)

• Thermostat and housing seals (if system is drained)