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Aluminum Coolant Overflow Expansion Tank 92-99 BMW 3 Series 323i 325i 328i M3 Z3
Aluminum Coolant Overflow Expansion Tank 92-99 BMW 3 Series 323i 325i 328i M3 Z3 Aluminum Coolant Overflow Expansion Tank 92-99 BMW 3 Series 323i 325i 328i M3 Z3 Aluminum Coolant Overflow Expansion Tank 92-99 BMW 3 Series 323i 325i 328i M3 Z3 Aluminum Coolant Overflow Expansion Tank 92-99 BMW 3 Series 323i 325i 328i M3 Z3 Aluminum Coolant Overflow Expansion Tank 92-99 BMW 3 Series 323i 325i 328i M3 Z3

Aluminum Coolant Overflow Expansion Tank 92-99 BMW 3 Series 323i 325i 328i M3 Z3

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Our Aluminum Expansion Tanks for the E46 323i 323Ci 325i 325Ci 328i 328Ci 330i and 330Ci completely solves a common problem with the factory E46 expansion tanks. The stock plastic expansion tank gets brittle over time and eventually fails.  

It's not just the original BMW expansion tank that fails, either. Any OEM-style tank is going to suffer from the same shortcomings and failures as the original. Made from plastic, they do nothing to resolve the underlying issues and you are only inviting another inconvenient failure at some unknown point down the line. The expansion tank drops in like an OE reservoir. This tank also includes a reservoir cap.

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