059121131S

Thermostat 059121131S for VAG

059121131S
Replacement number:
059 121 131 S
Quantity
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1. Product Overview

This product is a sealing component for the engine cooling system. Thermostat core is NOT included.It is mainly used for sealing and positioning at the thermostat mounting position, suitable for repair and replacement of the cooling system of VW/Audi 3.0L TDI diesel engines.

2. Key Specifications

  • OEM Model: 059121131S
  • Material: Engineering Plastic
  • Outer Diameter: 20 mm
  • Seal: With seal included
  • Component: Without thermostat core, only seal housing + seal

3. Product Functions

  1. Precise positioning: Provides a standard mounting position for the thermostat core to ensure concentricity and positional accuracy.
  2. Reliable sealing: Integrated special seal prevents coolant leakage and maintains stable cooling system pressure.
  3. Heat & aging resistance: The plastic body withstands normal engine operating temperatures, resists aging and deformation for long-term use.
  4. Repair-friendly: Designed for separate replacement of thermostat core or repair of failed seals, reducing unnecessary assembly replacement costs.

4. Application Scenarios

  • Repair of aged or leaking thermostat seals
  • Replacement of seal housing when changing thermostat core only
  • Seal upgrade during cooling system maintenance, water pump or pipeline disassembly

5. Installation Notes

  • Clean the mounting surface before installation; ensure no impurities, rust or residual adhesive.
  • Do not twist or misalign the seal; ensure even contact.
  • Tighten to standard torque to avoid seal failure caused by excessive compression.