HomeBelts and Cooling > Thermostat and HousingGenuine 12518611289 Engine Coolant Thermostat Adapter Lead
Part #: 12518611289

Genuine 12518611289 Engine Coolant Thermostat Adapter Lead

⚙️ 5 vehicles fit this part
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Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$52.70Free Shipping
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*Free return shipping only qualifies if our fitment verification tool is used.
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✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Mini, Cooper and Cooper Countryman
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Genuine Engine Coolant Thermostat Adapter Lead

The Genuine Engine Coolant Thermostat Adapter Lead is designed specifically for Mini Cooper and Mini Cooper Countryman models. This component ensures proper coolant flow and temperature regulation within the engine cooling system, maintaining optimal engine performance.

  • Compatible with Mini Cooper and Mini Cooper Countryman vehicles
  • OEM part number 12518611289 for precise fitment
  • Engine coolant thermostat adapter lead for reliable temperature control
  • Constructed to meet Genuine brand quality standards

Product Details and Specifications

This thermostat adapter lead serves as a critical connection point in the engine cooling system, linking the thermostat housing to the coolant lines. Manufactured under the Genuine brand, this part meets original equipment specifications to ensure durability and proper function. The adapter lead is engineered to fit Mini Cooper and Mini Cooper Countryman models, providing a secure and leak-free connection that supports efficient coolant circulation and temperature regulation.

Compatible Vehicles and Part Number

This product is compatible with the following Mini models:

  • Mini Cooper
  • Mini Cooper Countryman

Use part number 12518611289 when searching for this specific engine coolant thermostat adapter lead to ensure correct fitment and compatibility.

Common Applications and Problem Resolution

This thermostat adapter lead is used in the engine cooling system to facilitate proper coolant flow and temperature management. It can help address issues such as:

  • Coolant leaks around the thermostat housing
  • Engine overheating due to improper coolant circulation
  • Thermostat housing damage or wear
  • Reduced engine efficiency from faulty coolant flow

Installation Notes and Tips

  • Ensure the engine is cool before beginning installation to avoid burns
  • Verify compatibility with Mini Cooper or Cooper Countryman using part number 12518611289
  • Inspect surrounding hoses and seals for wear during replacement
  • Tighten all connections to manufacturer torque specifications to prevent leaks

Quality Assurance and Warranty

As a Genuine brand component, this engine coolant thermostat adapter lead is manufactured to meet strict quality standards for fit, form, and function. While specific warranty details may vary, Genuine parts typically come with a limited warranty covering defects in materials and workmanship to provide confidence in long-term reliability.

This part fits 5 vehicles. Search below:

YearMakeModelPositionNotes
2012MiniCooperN/AOne Long and One Short Lead; Thru 3/2012; Used to Adapt the Newer Thermostat Design to the Older Harness
2012MiniCooper CountrymanN/AOne Long and One Short Lead; Through 7/2012; Used to Adapt the Newer Thermostat Design to the Older Harness
2011MiniCooperN/AOne Long and One Short Lead; Used to Adapt the Newer Thermostat Design to the Older Harness
2011MiniCooper CountrymanN/AOne Long and One Short Lead; Used to Adapt the Newer Thermostat Design to the Older Harness
2010MiniCooperN/AFrom 8/2010; One Long and One Short Lead; Used to Adapt the Newer Thermostat Design to the Older Harness

* 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.