Vemo V15-99-2053 Engine Coolant Thermostat

Engine Coolant Thermostat for OE Fitment

The Vemo V15-99-2053 engine coolant thermostat is built for OE-style temperature control in select Audi and Volkswagen applications. With a 75°C opening temperature, it helps regulate coolant flow so the engine reaches and maintains the correct operating range.

VEMO Expert Kits+ packaging brings the needed thermostat components together in one box for a cleaner parts match during service. This V15-99-2053 thermostat is a direct-fit option for drivers searching for an Audi A4 Quattro thermostat, Volkswagen Jetta coolant thermostat, or Volkswagen Golf thermostat replacement.

Key Features

• Engine coolant thermostat with a 75°C opening temperature
• OE-grade application coverage for select Audi and Volkswagen models
• VEMO Expert Kits+ product line packaging
• Compact dimensions: 100 mm height, 98 mm width, 73 mm length
• Lightweight design at 0.061 kg
• Cross-reference part number: 1K0 121 113 A

Product Details

Part number V15-99-2053 is an engine coolant thermostat designed around OE specifications for cooling-system service. The 75°C opening temperature supports proper coolant circulation timing, which is important for stable engine temperature control in Audi A4 allroad, Audi A4 Quattro, Audi A5 Quattro, Audi A5 Sportback, Audi TT, Audi TT Quattro, and multiple Volkswagen platforms including Jetta, Golf, Passat, Beetle, CC, and Beetle models listed in the fitment data. If you need a Vemo thermostat for Volkswagen Jetta 2005-2015 or a thermostat for Audi TT Quattro 2009-2014, this part number is the relevant OE-style match.

VEMO Expert Kits+ means the product line is organized to supply the needed service parts in one package, reducing the chance of mismatched components during cooling-system repair. The V15-99-2053 thermostat is also referenced to OE number 1K0121113A for application matching.

What It Is Used For

• Restoring proper engine warm-up behavior
• Addressing coolant temperature regulation issues
• Replacing a thermostat that opens too early or too late
• Supporting stable operating temperature in Audi and Volkswagen cooling systems
• Correcting temperature-related drivability or heater performance complaints

Installation Notes and Tips

Verify the OE number and opening temperature before installation. Confirm the vehicle’s exact year breakpoints in the fitment data, especially for Volkswagen Jetta models with multiple production splits. Inspect the thermostat housing, seals, and coolant condition during service, and follow the manufacturer’s cooling-system bleed procedure after installation.

Quality Assurance

Vemo V15-99-2053 is an OE-grade cooling-system replacement part built to match the listed application requirements and OE reference 1K0121113A. The VEMO Expert Kits+ format is intended to streamline parts selection for thermostat service on covered Audi and Volkswagen vehicles.