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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 |
| Make | Model | Submodel | Engine | Notes |
|---|---|---|---|---|
| Audi | 80 | All | 4 Cylinder | Use vehicle selector to confirm fitment |
| Audi | 80 | FWD | 4cyl | Use vehicle selector to confirm fitment |
| Volkswagen | Corrado | All | G60 | Use vehicle selector to confirm fitment |
| Volkswagen | Golf II | All | 16v | Use vehicle selector to confirm fitment |
| Volkswagen | Golf II | All | 8v | Use vehicle selector to confirm fitment |
| Volkswagen | Jetta II | All | 16v | Use vehicle selector to confirm fitment |
| Volkswagen | Jetta II | All | 8v | Use vehicle selector to confirm fitment |
| Volkswagen | Passat B3 | All | 16v | Use vehicle selector to confirm fitment |
| Volkswagen | Scirocco II | All | 16v | Use vehicle selector to confirm fitment |
| Volkswagen | Scirocco II | All | 8v | Use vehicle selector to confirm fitment |


Hose connection found on the back of the block


Seals the connection between the oil cooler and the filter adapter. 59×5


Stepped plastic valves that resides under intake manifold & attached to the engine block breather system
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Maximizes flow for stock turbochargers or future upgraded turbochargers thanks to a removable adapter


O-Ring between thermostat housing and cylinder head