Aluminum Thermostat Bung Adapters For BMW E46 3 Series Coolant Plugs
Restore precise temperature control to your BMW’s diesel cooling system with these CNC-machined aluminum thermostat bung adapters. Built as direct replacements for cracked, corroded, or stripped factory coolant plugs, they bolt seamlessly into original mounting locations without requiring full radiator or housing replacements. Precision-formed from a single aluminum billet, this silver-finish upgrade improves heat transfer efficiency while maintaining a rigid, leak-proof seal around the thermostat housing.
Benefits & Practical Tips
- Optimized thermal management: The robust aluminum construction draws heat away faster than stock plastic or compromised metal bungs, helping to reduce inlet air temperatures and sustain reliable turbo boost.
- Protected internal pathways: Maintaining a secure, undistorted sealing surface prevents coolant contamination and stops debris or sludge from entering the thermostat area.
- Installation guidance: Clean the mating surface thoroughly before bolting the new bung into place. Use a moderate thread sealant on the outer threads to guarantee a permanent hold. Professional installation is strongly advised as manufacturer instructions are not supplied.
Product Specifications
- Material: Billet aluminum (silver)
- Construction Method: CNC-milled from solid stock
- Compatible Engine Codes: M47, M47N, M57, M47N2, M67, M47R
- Vehicle Compatibility: BMW 1 Series (E87), 3 Series (E90/E91/E92/E93), 5 Series (E39/E60/E61), 7 Series (E38/E65/E66), X3 (E83), X5 (E53/E70)
- Generation Years: 1997–2006 production runs
- Application: Diesel powertrains only
Package Includes
One precision-machined aluminum thermostat bung adapter ready for immediate mounting.
Important Reminders
Cross-reference your chassis code and engine designation against the fitment list above before ordering. This component is exclusively designed for diesel configurations and will not function on gasoline vehicles. Verify cam belt cover stickers or consult an authorized service center if unsure about part interchangeability.
Languages Supported: English
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