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$6.95
The 037121121A Coolant Flange is an OEM‑quality replacement designed to connect the engine block to the cooling system hoses while providing a sealed pathway for coolant flow. Located near the cylinder head, this flange keeps coolant circulating correctly and prevents overheating.
Over time, factory coolant flanges can crack, warp, or leak due to heat exposure and pressure. A failing flange may cause coolant loss, warning lights, or overheating. Replacing it with this durable OEM‑spec flange restores system reliability and peace of mind.
🔹 Features & Benefits:
| Weight | .20 lbs |
|---|---|
| Dimensions | 4 × 3 × 3 in |
| Mfg Part # | 037121121A |


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Hose connection found on the back of the block


Breather hose from front of block to valve cover


Maximizes flow for stock turbochargers or future upgraded turbochargers thanks to a removable adapter


Oil filter cartridge with o-ring
5X Entries For Our G87 M2 Sweepstakes!We Price Match – Give Us A Call or Chat! Hengst is our preferred OEM filtration supplier!