Aluminum Coolant Flange – 06H 121 132H (BG)

Description

The 06H121132H Aluminum Coolant Flange by BG is an upgraded, OE‑style replacement for select Volkswagen and Audi applications. This coolant outlet mounts to the engine and provides a secure connection point for the main coolant hose along with an auxiliary hose/bleeder port (application‑dependent), helping maintain proper coolant routing, system pressure, and stable operating temperature.

Factory plastic coolant flanges are a common failure point due to constant heat cycling and cooling system pressure. Over time they can warp, crack, or leak at the sealing surface—causing coolant loss, low‑coolant warnings, and overheating risk. Upgrading to this BG aluminum 06H121132H flange improves durability and helps reduce repeat leaks compared to plastic housings.

• OEM reference: 06H 121 132H
• Brand: BG – OE‑style replacement supplier
• Aluminum construction for improved durability vs. plastic flanges
• Designed to resist heat cycling, warping, and cracking
• Precision sealing surface for reliable, leak‑free performance
• Direct‑fit replacement; no modifications required
• Helps prevent coolant loss and overheating concerns

Applications

Used on select VW/Audi models that specify coolant flange/water outlet part number 06H121132H.

(Fitment varies by engine code and model year—confirm by VIN/parts catalog and match the hose/port layout.)

Service Notes

• Replace the O‑ring/gasket during installation to ensure a proper seal.
• Replace hose clamps if worn and inspect connected hoses for swelling/cracking.
• Refill with VW/Audi‑approved coolant and properly bleed the cooling system after service.

Cross Reference

• 06H 121 132
• 06H 121 132A

Additional information