TASK · COOLING SYSTEM

E46 M3 Cooling System Refresh

Replace water pump, thermostat, radiator, expansion tank, and all coolant hoses in one job. Plastic components are prone to failure on aged E46s. Comprehensive guide to the full cooling system refresh.

Videos2DifficultyintermediateAvg time4–8 hoursRiskmoderate

Fits your situationEngine: S54

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E46 M3 Cooling System Refresh — All Plastic Parts at Once

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E46 M3 Cooling System Refresh — All Plastic Parts at Once

E46 Specialist

Complete cooling system overhaul replacing water pump, thermostat, radiator, expansion tank, and hoses. Comprehensive guide for doing everything in one job.

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BMW E46 Cooling System Refresh — DIY Guide

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BMW E46 Cooling System Refresh — DIY Guide

Community cooling system refresh guide for the E46 platform.