06L 117 021G – Oil Cooler (Supplier Brand)

Description

The 06L 117 021G Oil Cooler by BG is a direct-fit OEM-quality replacement designed to restore proper engine oil temperature regulation on select Volkswagen and Audi applications. Specifically, this oil cooler transfers excess heat from the engine oil into the coolant circuit, preventing oil viscosity breakdown under sustained high-load and high-temperature operating conditions. Furthermore, the BG 06L 117 021G Oil Cooler is manufactured to OEM dimensions, ensuring direct fitment with all factory coolant connections, gasket surfaces, and mounting hardware — no modifications required.

Signs Your Oil Cooler Needs Replacing

Oil cooler failures typically develop gradually, so recognizing early warning signs helps prevent costly secondary engine damage. First, milky or foamy oil visible on the dipstick or inside the oil filler cap strongly indicates that coolant is mixing with engine oil through a failed cooler. Additionally, unexplained coolant loss with no visible external leak is another reliable indicator of internal seepage within the cooler itself. Furthermore, an engine running hotter than normal under sustained load — despite an otherwise functional cooling system — can point to a restricted or degraded oil cooler. In more advanced cases, contaminated oil causes accelerated wear on bearings and other precision internal components.

06L 117 021G Oil Cooler — Key Features

• OEM Reference: 06L 117 021G

• Brand: BG — OE-quality aftermarket thermal management components

• Precision-engineered to OEM dimensions for direct fitment

• Correct port geometry for seamless coolant circuit integration

• High-grade materials built to withstand sustained heat cycling and pressure

• Factory-spec sealing surfaces for a leak-free installation

Service Notes

Always replace the oil cooler gasket and sealing O-rings at the time of installation — reusing old seals is the most common cause of post-repair leaks. After installation, refill both engine oil and coolant to the correct levels using manufacturer-approved fluids only. Next, run the engine to full operating temperature and inspect all connections carefully for any signs of seepage. Furthermore, monitor both fluid levels over the first several driving cycles to confirm the installation is fully sealed. Finally, if coolant contamination was present prior to replacement, flush the engine oil system thoroughly before refilling with fresh oil.

Compatibility & Applications

Always verify fitment by VIN before ordering.

Cross Reference Numbers

• 06L 117 021

• 06L 117 021A

• 06L 117 021B

• 06L 117 021C

• 06L 117 021F

Additional information