About E46 Expansion Tank
Your BMW E46 is a lean and mean performance car, so you want to make sure you keep it running in top condition. If you are noticing a coolant leak from your car, chances are you need a replacement E46 expansion tank. The expansion tank is designed to capture excess coolant that collects from the radiator as the radiator heats up. This helps keep your radiator full at all times. If there is a crack in the expansion tank or it is broken, this excess coolant falls to the road. A broken expansion tank may cause the car to overheat, so it is an important problem to fix. A replacement expansion tank often includes a coolant sensor and cap to fully replace the broken piece. Installation is often easy enough for a do-it-yourself job, which can save both time and money over going to a mechanic. If your BMW E46 is leaking coolant, browse the large inventory of E46 expansion tanks on eBay to find the part that gets your car running like new again.