Radiator Coolant Overflow Reservoir Expansion Recovery Tank

LEIMO KPARTS radiator coolant overflow reservoir is a direct-fit replacement expansion/recovery tank designed to restore proper coolant circulation and pressure control for compatible VW and Audi models.

When an original coolant expansion tank becomes cracked, warped or begins to leak, it can cause coolant loss, air entry and overheating risk. This replacement tank is molded to match the OE shape and mounting points so you can swap it in without modifications. Constructed to tolerate engine-bay temperatures and vibration, it includes the necessary cap and sensor port to integrate with the factory cooling system.

How does this tank match my vehicle’s original part?

The LEIMO KPARTS tank is produced to align with the OE dimensions, mounting tabs and hose connections labeled under part number 1K0121407A. That ensures straightforward bolt-in installation and compatibility with the factory cap and level sensor.

• Exact fit for listed VW and Audi models; no trimming or adapters needed.
• Matches OE hose location and sensor port for plug-and-play replacement.
• Replacement OE numbers referenced so you can cross-check fitment.

What materials and durability can I expect?

This expansion tank is made from heat-resistant plastic engineered to resist cracking and distortion from thermal cycling. The design focuses on sealing under pressure and preventing coolant loss or air ingress that can accelerate corrosion in the cooling loop.

• High-temperature resistant polymer to withstand under-hood heat.
• Engineered to resist leaks and vibration-induced stress fractures.
• Quality tested to reduce the likelihood of early failure or seepage.

Which models and years does this reservoir fit?

Fitment covers a range of Volkswagen and Audi platforms. Always confirm compatibility by matching your OEM part number or checking the vehicle list before ordering to ensure proper fit.

• VW: CC (2009–2012), Eos (2007–2012), Golf (2010–2012), GTI (2006–2012), Jetta (2005–2012), Passat (2006–2012), Rabbit (2006–2009), Tiguan (2009–2012), Beetle (2012).
• Audi: A3 and A3 Quattro (2006–2013), TT (2008–2009), TT Quattro (2008–2011).
• OE reference: 1K0121407A (also listed under alternative part numbers for cross-reference).

What’s included and what should I prepare for installation?

The package contains one coolant reservoir tank ready to install. You may need basic hand tools and a coolant catch basin; replacing the tank typically involves draining some coolant and refilling to the correct level.

• Includes: 1 replacement coolant reservoir tank with cap/sensor port.
• Installation: basic hand tools, coolant collection container, and new coolant as required.
• Warranty: 12 months unlimited mileage coverage for peace of mind.

Who is this for? If you drive a compatible Volkswagen or Audi and you’re experiencing coolant loss, visible tank damage, or dashboard coolant warnings, this LEIMO KPARTS reservoir is intended for owners and mechanics seeking a reliable, direct-fit replacement. It’s suited for DIY-savvy car owners and professional shops that need an OE-style component to restore proper cooling system operation without modifying factory hardware.