BMW 3/5 Series & M3 & Z3 Coolant Expansion Tank (1992–2000)

This factory BMW Coolant Expansion Tank is intended for the engine cooling system on BMW 3/5 Series & M3 & Z3 from 1992–2000. It stores expanding coolant and provides the system’s fill and recovery point. The supported range includes 323i, 323is, 325i, 325is, 328i, and 328is, plus additional listed variants. BMW identifies Original BMW Parts as the parts designed, tested, and manufactured by BMW for its vehicles.

Technical Details

• Manufacturer: BMW
• Component: Coolant Expansion Tank
• Manufacturer part number: 17-11-1-723-520
• Production range: 1992–2000
• Vehicle applications: BMW 3/5 Series & M3 & Z3
• Primary function: stores expanding coolant and provides the system’s fill and recovery point
• Listed models: 323i, 323is, 325i, 325is, 328i, and 328is, plus additional listed variants
• Listed submodels: M Coupe, M Roadster, and Roadster

Fitment & Compatibility

Review the table below for year-by-year model coverage, submodels, and any listed equipment notes. Match the engine, hose or connection layout, cooling-system equipment, and production date. PMB Performance can review the VIN when model-year or equipment details are unclear, drawing on more than 20 years of European-parts experience.