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Engine Coolant Thermostat 06J-121-113-C
Verfügbar in Shops 11 Angebote
Fahrzeug-Passgenauigkeit 72 Fahrzeuge
Technische Daten
| OEM Part Number | 06J 121 113 C |
|---|---|
| Part Type | Engine Coolant Thermostat |
| Opening Temperature | 95°C (203°F) |
| Gasket / Seal Included | Yes (on select versions) |
| Material | Metal alloy housing with durable plastic components |
| Compatible Brands | Volkswagen, Audi, SEAT, Škoda, Porsche |
| OEM Supplier Cross | Mahle Behr |
| Dimensions | — |
So ersetzen Sie Engine Coolant Thermostat
Replacing the 06J121113C thermostat is a moderate DIY task requiring basic hand tools and comfort working around the cooling system. Always allow the engine to cool completely before starting, and have fresh coolant ready for refilling. The procedure below is a general guide — always consult your vehicle-specific service manual for torque values and model-specific routing.
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Prepare the Vehicle
Ensure the engine is completely cool before starting. Disconnect the negative battery terminal to prevent electrical hazards. Place a drain pan beneath the radiator drain plug.
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Drain the Coolant
Open the radiator drain plug or lower radiator hose to drain coolant into a suitable container. Retain the coolant for disposal or reuse if it is still within service life.
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Access the Thermostat Housing
Remove any obstructing components such as engine covers, air intake ducts, or bracket assemblies to gain clear access to the thermostat housing location on the engine block.
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Remove the Old Thermostat
Disconnect the coolant hoses from the thermostat housing. Unbolt the housing, then carefully extract the old thermostat and its gasket or seal. Clean all mating surfaces thoroughly.
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Install the New Thermostat
Place the new 06J121113C thermostat into the housing in the correct orientation (bleed hole typically facing upward). Fit a new gasket or seal. Reattach the housing and tighten bolts to the manufacturer-specified torque value from your service manual.
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Reassemble and Refill Coolant
Reconnect all coolant hoses and reinstall any components removed for access. Refill the cooling system with the correct VW-approved coolant mixture. Bleed the system per your service manual procedure to remove all air pockets.
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Test and Verify
Reconnect the negative battery terminal. Start the engine and allow it to reach operating temperature. Check for coolant leaks at the thermostat housing and monitor the temperature gauge to confirm the thermostat opens and the system stabilizes correctly.
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Engine Overheating
A thermostat stuck closed prevents coolant from reaching the radiator, causing the engine temperature to rise rapidly into the overheat range. This is the most urgent failure symptom.
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Engine Runs Too Cold / Slow Warm-Up
A thermostat stuck open allows constant coolant flow through the radiator, preventing the engine from reaching normal operating temperature. This reduces heater output and fuel efficiency.
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Erratic or Fluctuating Temperature Gauge
If the temperature gauge swings up and down unexpectedly during normal driving, the thermostat may be opening and closing erratically rather than at a consistent set point.
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Coolant Leaks Around the Thermostat Housing
A failed gasket or cracked housing associated with the thermostat can cause visible coolant seepage or drips near the thermostat location on the engine.
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Heater Producing Insufficient Heat
Because cabin heat is drawn from engine coolant, a thermostat stuck open that keeps coolant too cool will result in weak or cold output from the vehicle's heater even at full setting.
Wechselintervalle
No factory-mandated replacement interval exists for this thermostat. Replacement is condition-based. If the cooling system is being opened for another major repair, replacing the thermostat proactively is cost-effective given the low parts cost relative to labor.
Häufig gestellte Fragen
Is the 06J121113C thermostat an exact OEM replacement for my Audi or VW?
Yes. Part number 06J 121 113 C is a shared OEM number used across Volkswagen, Audi, SEAT, Škoda, and Porsche. Verify your vehicle's engine code against the compatibility list (e.g., Audi A3 8P, A4 B8, Q5, TT; VW Jetta, Passat, Tiguan) to confirm fitment before ordering.
What is the opening temperature of the 06J121113C thermostat?
This thermostat opens at 95°C (203°F), which is the factory specification for the compatible VW Group engines. Using a thermostat with a different opening temperature can cause incorrect engine operating temperatures and potential ECU issues.
Does this thermostat come with a gasket?
It depends on the source and version. Some listings — including the KAMOKA and FISPA aftermarket equivalents — explicitly include a gasket or seal. Always confirm what is included in the kit before purchasing, and have a new gasket on hand regardless to avoid coolant leaks after installation.
Can I replace the 06J121113C thermostat myself, or does it need a shop?
This is a moderate DIY repair accessible to a home mechanic with basic tools and comfort working on the cooling system. The key requirements are allowing the engine to cool fully, properly bleeding the cooling system after refill, and using the correct torque values from the service manual. If you are unsure about bleeding the cooling system, a shop visit is advisable.
What coolant should I use when refilling after replacing the thermostat?
Use a VW Group approved coolant — typically G12, G12+, G12++, or G13 depending on your model year. These are OAT (organic acid technology) coolants and should not be mixed with conventional green coolant. Mix to the concentration specified for your climate. Check your owner's manual or service information for the exact specification.
Are there any superseding or updated part numbers for 06J121113C?
The 06J 121 113 C designation is the active OEM part number referenced across VW Group brands and major aftermarket suppliers at the time of this writing. Always confirm with an authorized VW/Audi dealer parts department that no supersession has been issued, especially for older vehicle applications.
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