Thermostat gasket VAG Group | Original 038121119B, Ø50mm x 4mm thick 1.9 TDI engines

Main benefits

This 038121119B thermostat gasket eliminates coolant leaks at the thermostat housing joint during preventive replacements or repairs.
Its OEM design ensures uniform compression and resistance to thermal cycles, prolonging the life of the cooling system.

Technical characteristics

Precise inner diameter 50 mm, thickness 4 mm, anti-aging synthetic rubber material.
Resists temperatures of 100-150°C and pressure up to 2 bar, typical for the circuit.
Attention: Requires rivet N0385494 separately for correct fastening.

Engine compatibility

VAG Group 1.9 TDI engines 1997-2005: AHU, AGR, ALH, ARL, ASZ, ATD, AXR, AXC.
Main models: VW Golf IV, Passat B5, Audi A3 8L, SEAT Ibiza II/III, Leon 1M, Skoda Octavia I.

Recommended installation

Thorough cleaning of surfaces, apply new gasket, specified torque (8-10 Nm), install rivet N0385494.
Bleed the cooling system after assembly to avoid air bubbles.

Frequently asked questions (FAQ)

Does it include a rivet?
No, rivet N0385494 is sold separately.

Exact measurements?
Inner Ø 50 mm, thickness 4 mm.

For gasoline or diesel engines?
Specific for 1.9 TDI (diesel).

Does it resist ethylene glycol?
Yes, rubber compatible with G11/G12/G13 VAG coolants.

Technical data sheet (key: value)

• Reference: 038121119B

• Type: Thermostat housing gasket

• Inner diameter: 50 mm

• Thickness: 4 mm

• Material: HT synthetic rubber

• Max. temperature: 150°C

• Does NOT include: Rivet N0385494

OEM VAG Group gasket with 2-year warranty. Verify engine code and purchase rivet N0385494 separately.
Professional installation recommended to avoid over-torquing.

Add the original 038121119B thermostat gasket to your cart + remember the N0385494 rivet to complete your replacement.