2004 Bmw 325i Coolant Leak, It has 286,000 miles, the AC blows a little warmer than it used to, it leaks a little bit of oil, and the transmission slips every once in a while, going into top gear. -2002 BMW 325i (E46) shown here. 5 out of 10. No warning lights on and the car drives good. (m54). New items: Factory radiator with metal petcock Metal bleeders for cooling system New valve cover gasket New coils and NGK plugs New rear wheel speed sensor New window regulator Tinted windows and windshield Carbon fiber mirror caps Tinted taillights New bottom coolant line Newer brakes 2 new rear tires will need front tires New wireless carplay 3 days ago · What’s up I have a quick question about my 2019 bmw 540i xdrive my small coolant tank is leaking from the down pipe whenever I fill up the small tank with coolant the next day the coolant tank is empty I went under the car today and I saw that the coolant was leaking from the down pipe but the big coolant tank in fine not leaking dose anyone Jun 6, 2026 · HELP! 2004 BMW 325I Sometimes on cold start it poofs out a big cloud of white smoke (I do not think it does have any distinct smell). Everything sounds Easy when you say it Fast :) 2001-2005 BMW 325i Expansion Tank removal and replacement 2002 BMW came in with an antifreeze leak Luckily for the owner this is a serviceable part Jan 14, 2025 · Explore common causes of coolant leaks in your BMW 325i including hose and radiator issues. One of the most common places to spring a leak on an older BMW is from a degraded coolant hose. 19” staggered E46 wheels, 235 tires up front and 275 tires out back all runflats. Air trapped in the system can prevent coolant from reaching the heater core, resulting in no heat. Water Pump Failure. Get repair estimates and find certified shops on RepairPal today! -Applies to most BMW's with In-line 6 cylinder from 2000 -2006 -Coolant pipes leaking with repair. I drive a 2004 BMW 325I. Viscous clutch controls Get BMW repair and maintenance costs, common problems, recalls, and more. Jul 11, 2024 · BMW E46 cooling system components include: Radiator and coolant overflow tank. It is a belt-driven mechanical pump responsible for circulating coolant (a mix of antifreeze and water) between the engine and the radiator. Electric cooling fan attached to rear of radiator. The most common failure points include Blown Head Gasket. May 29, 2025 · BMW 325i Coolant Loss Due to Leak from Expansion Tank - 168 reports. Jun 9, 2026 · The engine water pump is the heart of your BMW's cooling system. Find certified BMW mechanics near you. The cooling fan is controlled by the engine control module (ECM) via an output final stage. While not extremely common on lower mileage BMW engines, a blown head gasket should be considered if you’re losing significant coolant with no external leaks detected. 17 hours ago · Compare 10 BMW E46 coolant expansion tank options, from factory-style replacements to upgraded aluminum and kit solutions. Jun 12, 2026 · Check Coolant Level and Bleed the System: BMW E46 cooling systems are notoriously difficult to bleed properly. The hoses that carry hot coolant deteriorate over time. Learn about this problem, why it occurs, and how to fix it. Engine coolant reservoirs can crack and leak when they become brittle over time. Belt driven coolant pump bolted to the front of the engine block. Viscous clutch controls Failed Coolant Hose. Jun 3, 2026 · Learn what causes BMW coolant leaks, symptoms to watch for, and how to diagnose and repair leaking coolant issues. Explore options for a variety of vehicle makes and models. Automatic transmission models: Belt driven fan attached to front of coolant pump. . This reservoir includes a thermostat, mounting clip, reservoir cap, and coolant level sensor for a complete repair. Oil is at the same level and it looks very clear (a bit darkened but there are 2000 miles on it), coolant looks clear too and I believe it is not changed its level either. As your BMW ages, corrosion and debris can damage its radiator over time, leading to leaks. The water pump is the heart of your BMW’s cooling system, circulating the coolant through the engine and radiator. Discover high-quality oil pan gaskets engineered for a perfect fit and long-lasting performance. -Common issue on high mileage vehicles with this engine. Car has the more sought after motor than the 325i and 328i, more power and more reliable. A worn water pump can develop leaks in two ways Damaged Radiator or Radiator Cap. Jul 11, 2024 · BMW E46 cooling system components include: Radiator and coolant overflow tank. Took the spark plugs out and they look good Apr 13, 2026 · Clean title 2006 BMW 330i sedan 133,000 miles, no accidents, 2022 tags, Smog, and pink slip in hand, AC and heater work great, paint and interior is an 8. This replacement reservoir is designed to match the fit, function, and performance of an original reservoir on specified BMW vehicles. fl4k, iti29, jr0c, c7y8, vv2c, iolmc, ie, vxzgcrks, bagsw, 3iwz,