Bmw E39 Coolant Reservoir
By the Editorial Staff
March 24, 2026
Add to cart Coolant Reservoir Tank With Cap Fit for 1999 - 2003 BMW E39 525i 528i 528it 530i OE# 603-536, 603536, 17111436381, 5715334003, EPK0015, FRT1902C, Z49003, SK603536 Save 5% at checkout Add to cart. It's common to have to replace the coolant expansion tank on a BMW E39 5. BMW recommends that you replace your coolant every 2 to 3 years depending on what BMW coolant you use.
See our tech article on refilling and bleeding the cooling system. We will show you the removal steps on the eight cylinder on engine. The six cylinder steps are virtually identical.
Follow the same steps for both engines. Replace your factory plastic coolant reservoir with a Turner Heavy Duty aluminum tank for durability and piece of mind! Direct replacement for expansion tank 17111723520. BMW E39 Coolant Expansion Tank is an essential component designed to maintain the proper coolant level in your vehicle's cooling system.
Manufactured with high-quality materials, this expansion tank ensures reliable performance and durability, preventing engine overheating by accommodating the expansion of coolant as it heats up. For those who want to improve an e39 or e38 cooling system without replacing the radiator we would like to introduce our newest cooling system upgrade. This shroud and expansion tank assembly is an excellent way to improve cooling while preserving the value of your current radiator investment.
Coolant Reservoir DIY Replacement *E39 BMW*. This is a Coolant Expansion Reservoir Tank designed for a 1999. BMW expansion tanks should be inspected during routine maintenance.
We recommend replacing the expansion tank as a preventatively whenever you replace the radiator and coolant hoses. 【Compatible Models】: This coolant reservoir tank is compatible with BMW E39 Series 525i 2001-2003 2.5L, 528i 1999-2000 2.8L, 530i 2001-2003 3.0L, E38 Series 728i 1995-2001 2.8L. 【Functions】: This engine coolant overflow recovery reservoir tank is made of durable PA plastic materials capable of withstanding high levels of heat and vibration.
