HomeBelts and Cooling > Thermostat and HousingRein CTI0003 Engine Coolant Thermostat
Part #: CTI0003

Rein CTI0003 Engine Coolant Thermostat

⚙️ 143 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Volkswagen and Audi, Beetle, Golf, Jetta, Passat, Cabrio, Cabriolet, Fox, Corrado, 80, Scirocco, 90, 4000, and Quantum
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Reliable Engine Coolant Thermostat for Audi and Volkswagen Vehicles

The Rein CTI0003 engine coolant thermostat is designed to meet original equipment specifications, ensuring precise temperature regulation for your Audi or Volkswagen. This application-specific thermostat helps maintain optimal engine performance and prevents overheating.

Key Features of Rein CTI0003 Thermostat

  • Matches original equipment design specifications for accurate fit and function
  • Includes all necessary gaskets and seals for straightforward installation
  • Manufactured under strict engineering standards for durability and reliability
  • Thermostat set to open at 87 degrees Celsius to maintain optimal engine temperature
  • Compact dimensions: 3.0 inches length, 3.0 inches width, and 2.0 inches height
  • Lightweight design at 0.235 pounds for efficient engine operation

Detailed Product Description

The Rein CTI0003 engine coolant thermostat insert is engineered as a direct replacement for select Audi and Volkswagen models, including the Audi 80, 90, 4000, and Volkswagen Beetle, Cabrio, Corrado, Fox, Golf, Jetta, Passat, and Quantum. Manufactured in China, this thermostat is set to open at 87 degrees Celsius, which helps maintain the engine’s optimal running temperature, improving fuel efficiency and reducing emissions. The product comes complete with all necessary gaskets and seals, simplifying the installation process and ensuring a secure, leak-free fit.

Compatible Vehicles and Common Applications

  • Audi 80, 90, 4000 models requiring precise temperature control
  • Volkswagen Beetle, Cabrio, Corrado, Fox, Golf, Jetta, Passat, and Quantum models
  • Replacement for thermostats that fail to regulate engine temperature properly
  • Ideal for resolving engine overheating or poor heater performance
  • Suitable for vehicles experiencing coolant leaks or thermostat housing issues

Installation Notes and Tips

When installing the Rein CTI0003 thermostat, ensure the engine is cool before beginning work. Use the supplied gaskets and seals to prevent leaks and verify the thermostat orientation matches the original equipment. Proper torque specifications should be followed to avoid damage to the housing. It is recommended to flush the cooling system during replacement to remove any debris that could affect thermostat operation.

Quality Assurance and Warranty Information

Rein thermostats are manufactured to meet strict engineering standards, ensuring consistent performance and durability. The CTI0003 thermostat is designed as an application-specific replacement part, providing reliable temperature regulation for your Audi or Volkswagen. While specific warranty details are not provided, Rein products typically adhere to industry quality controls to support long-term vehicle operation.

BrandRein
Part NumberCTI0003
Application TypeApplicationSpecific
Container TypeBX
Country of OriginCN
Item Height2.0000
Item Length3.0000
Item Level GTIN843266075883
Item Qty1
Item UOMEA
Item Weight0.2350
Item Weight Unit UOMLB
Item Width3.0000
Link to Manufacturer Pagewww.reinautomotive.com
Product Desc Extended 240Rein OE quality thermostat inserts are designed to be direct replacements for OE thermostat inserts. Rein thermostat inserts are manufactured with high-quality plastic or metal construction to ensure durability and long service life.
Product Desc Invoice 40Rein Thermostat Insert
Product Desc Long 80Rein OE Quality Thermostat Insert
Product Desc Short 20Thermostat Insert

This part fits 143 vehicles. Search below:

YearMakeModelBody TypeLitersCylindersFuel TypePositionNotes
2006VolkswagenBeetle1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2006VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2005VolkswagenBeetle1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2005VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2005VolkswagenJettaSedan1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2005VolkswagenJettaWagon1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2005VolkswagenPassat2.0LL4DIESELN/AEngine Coolant Thermostat 87c
2004VolkswagenBeetle1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2004VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2004VolkswagenJetta1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2004VolkswagenPassat2.0LL4DIESELN/AEngine Coolant Thermostat 87c
2003VolkswagenBeetle1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2003VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2003VolkswagenJetta1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2002VolkswagenBeetle1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2002VolkswagenCabrio2.0LL4N/AEngine Coolant Thermostat 87c
2002VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2002VolkswagenJetta1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2001VolkswagenBeetle1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2001VolkswagenCabrio2.0LL4N/AEngine Coolant Thermostat 87c
2001VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2001VolkswagenJetta1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2000VolkswagenBeetle1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2000VolkswagenCabrio2.0LL4N/AEngine Coolant Thermostat 87c
2000VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
2000VolkswagenJetta1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1999VolkswagenBeetle1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1999VolkswagenCabrio2.0LL4N/AEngine Coolant Thermostat 87c
1999VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1999VolkswagenJetta1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1999VolkswagenJetta2.0LL4N/AEngine Coolant Thermostat 87c
1998VolkswagenBeetle1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1998VolkswagenCabrio2.0LL4N/AEngine Coolant Thermostat 87c
1998VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1998VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1998VolkswagenGolf2.0LL4N/AEngine Coolant Thermostat 87c
1998VolkswagenJetta1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1998VolkswagenJetta2.0LL4N/AEngine Coolant Thermostat 87c
1997VolkswagenCabrio2.0LL4N/AEngine Coolant Thermostat 87c
1997VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1997VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1997VolkswagenGolf2.0LL4N/AEngine Coolant Thermostat 87c
1997VolkswagenJetta1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1997VolkswagenJetta2.0LL4N/AEngine Coolant Thermostat 87c
1997VolkswagenPassat1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1996VolkswagenCabrio2.0LL4N/AEngine Coolant Thermostat 87c
1996VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1996VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1996VolkswagenGolf2.0LL4N/AEngine Coolant Thermostat 87c
1996VolkswagenJetta1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1996VolkswagenJetta2.0LL4N/AEngine Coolant Thermostat 87c
1996VolkswagenPassat1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1996VolkswagenPassat2.0LL4N/AEngine Coolant Thermostat 87c
1995VolkswagenCabrio2.0LL4N/AEngine Coolant Thermostat 87c
1995VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1995VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1995VolkswagenGolf2.0LL4N/AEngine Coolant Thermostat 87c
1995VolkswagenJetta1.8LL4N/AEngine Coolant Thermostat 87c
1995VolkswagenJetta1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1995VolkswagenJetta2.0LL4N/AEngine Coolant Thermostat 87c
1995VolkswagenPassat1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1995VolkswagenPassat2.0LL4N/AEngine Coolant Thermostat 87c
1994VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1994VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1994VolkswagenGolf2.0LL4N/AEngine Coolant Thermostat 87c
1994VolkswagenJetta1.8LL4N/AEngine Coolant Thermostat 87c
1994VolkswagenJetta1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1994VolkswagenJetta2.0LL4N/AEngine Coolant Thermostat 87c
1994VolkswagenPassat1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1994VolkswagenPassat2.0LL4N/AEngine Coolant Thermostat 87c
1993VolkswagenCabriolet1.8LL4N/AEngine Coolant Thermostat 87c
1993VolkswagenFox1.8LL4N/AEngine Coolant Thermostat 87c
1993VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1993VolkswagenGolf1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1993VolkswagenGolf2.0LL4N/AEngine Coolant Thermostat 87c
1993VolkswagenJetta1.8LL4N/AEngine Coolant Thermostat 87c
1993VolkswagenJetta1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1993VolkswagenJetta2.0LL4N/AEngine Coolant Thermostat 87c
1993VolkswagenPassat1.8LL4N/AEngine Coolant Thermostat 87c
1993VolkswagenPassat1.9LL4DIESELN/AEngine Coolant Thermostat 87c
1993VolkswagenPassat2.0LL4N/AEngine Coolant Thermostat 87c
1992VolkswagenCabriolet1.8LL4N/AEngine Coolant Thermostat 87c
1992VolkswagenCorrado1.8LL4N/AEngine Coolant Thermostat 87c
1992VolkswagenFox1.8LL4N/AEngine Coolant Thermostat 87c
1992VolkswagenGolf1.6LL4DIESELN/AEngine Coolant Thermostat 87c
1992VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1992VolkswagenGolf2.0LL4N/AEngine Coolant Thermostat 87c
1992VolkswagenJetta1.6LL4DIESELN/AEngine Coolant Thermostat 87c
1992VolkswagenJetta1.8LL4N/AEngine Coolant Thermostat 87c
1992VolkswagenJetta2.0LL4N/AEngine Coolant Thermostat 87c
1992VolkswagenPassat1.8LL4N/AEngine Coolant Thermostat 87c
1992VolkswagenPassat2.0LL4N/AEngine Coolant Thermostat 87c
1991VolkswagenCabriolet1.8LL4N/AEngine Coolant Thermostat 87c
1991VolkswagenCorrado1.8LL4N/AEngine Coolant Thermostat 87c
1991VolkswagenFox1.8LL4N/AEngine Coolant Thermostat 87c
1991VolkswagenGolf1.6LL4DIESELN/AEngine Coolant Thermostat 87c
1991VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1991VolkswagenGolf2.0LL4N/AEngine Coolant Thermostat 87c
1991VolkswagenJetta1.6LL4DIESELN/AEngine Coolant Thermostat 87c
1991VolkswagenJetta1.8LL4N/AEngine Coolant Thermostat 87c
1991VolkswagenJetta2.0LL4N/AEngine Coolant Thermostat 87c
1991VolkswagenPassat1.8LL4N/AEngine Coolant Thermostat 87c
1991VolkswagenPassat2.0LL4N/AEngine Coolant Thermostat 87c
1990Audi802.0LL4N/AEngine Coolant Thermostat 87c
1990VolkswagenCabriolet1.8LL4N/AEngine Coolant Thermostat 87c
1990VolkswagenCorrado1.8LL4N/AEngine Coolant Thermostat 87c
1990VolkswagenFox1.8LL4N/AEngine Coolant Thermostat 87c
1990VolkswagenGolf1.6LL4DIESELN/AEngine Coolant Thermostat 87c
1990VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1990VolkswagenGolf2.0LL4N/AEngine Coolant Thermostat 87c
1990VolkswagenJetta1.6LL4DIESELN/AEngine Coolant Thermostat 87c
1990VolkswagenJetta1.8LL4N/AEngine Coolant Thermostat 87c
1990VolkswagenJetta2.0LL4N/AEngine Coolant Thermostat 87c
1990VolkswagenPassat2.0LL4N/AEngine Coolant Thermostat 87c
1989Audi802.0LL4N/AEngine Coolant Thermostat 87c
1989VolkswagenCabriolet1.8LL4N/AEngine Coolant Thermostat 87c
1989VolkswagenFox1.8LL4N/AEngine Coolant Thermostat 87c
1989VolkswagenGolf1.6LL4DIESELN/A87c, Mexico Built
1989VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1989VolkswagenJetta1.6LL4DIESELN/A87c, Mexico Built
1989VolkswagenJetta1.8LL4N/AEngine Coolant Thermostat 87c
1988Audi802.0LL4N/AEngine Coolant Thermostat 87c
1988Audi902.0LL4N/AEngine Coolant Thermostat 87c
1988VolkswagenCabriolet1.8LL4N/AEngine Coolant Thermostat 87c
1988VolkswagenFox1.8LL4N/AEngine Coolant Thermostat 87c
1988VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1988VolkswagenJetta1.6LL4DIESELN/A87c, Germany Built
1988VolkswagenJetta1.8LL4N/AEngine Coolant Thermostat 87c
1987Audi40001.8LL4N/AEngine Coolant Thermostat 87c
1987VolkswagenCabriolet1.8LL4N/AEngine Coolant Thermostat 87c
1987VolkswagenFox1.8LL4N/AEngine Coolant Thermostat 87c
1987VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1987VolkswagenJetta1.6LL4DIESELN/A87c, Germany Built
1987VolkswagenJetta1.8LL4N/AEngine Coolant Thermostat 87c
1986Audi40001.8LL4N/AEngine Coolant Thermostat 87c
1986VolkswagenCabriolet1.8LL4N/AEngine Coolant Thermostat 87c
1986VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1986VolkswagenJetta1.8LL4N/AEngine Coolant Thermostat 87c
1985Audi40001.8LL4N/AEngine Coolant Thermostat 87c
1985VolkswagenCabriolet1.8LL4N/AEngine Coolant Thermostat 87c
1985VolkswagenGolf1.8LL4N/AEngine Coolant Thermostat 87c
1985VolkswagenJetta1.8LL4N/AEngine Coolant Thermostat 87c
1985VolkswagenQuantum1.8LL4N/AEngine Coolant Thermostat 87c

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.