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Description

Meyle expansion tank 17111723520

The Meyle expansion tank 17111723520 is the coolant reservoir for the BMW E39 520i, 523i and 528i and the E38 728i, and the recommended separate tank for any aluminium radiator without a built-in expansion tank. It absorbs the expanding coolant and keeps the pressure in the cooling system constant, preventing overheating and leaks.

After years of heat, the original BMW expansion tank becomes brittle and cracks, often invisibly at a seam. The Meyle tank is made from reinforced, heat-resistant plastic to OEM specifications, with exactly the same fit and connections, but new and strong.

If you are converting an E36 or E46 to an aluminium radiator without an internal expansion tank, this is the tank that neatly completes the system.

Key benefits

• OEM quality from Meyle, part number 17111723520
• Reinforced, heat-resistant plastic for a long service life
• Constant pressure in the cooling system
• Direct fit, no modifications required
• Recommended for aluminium radiators without an internal expansion tank
• 2-year manufacturer’s warranty

Suitable for

BMW 5 Series E39 and 7 Series E38 (original fitment)

• E39 520i Saloon and Touring (1996-2003)
• E39 523i Saloon and Touring (1995-2000)
• E39 528i Saloon and Touring (1995-2000)
• E38 728i / 728iL (1995-2001)

As a separate expansion tank for aluminium radiators

• Aftermarket radiators without an integrated expansion tank, for example on the E36 and E46

Technical specifications

• Manufacturer: Meyle
• Part number / OE reference: 17111723520
• Material: reinforced plastic
• Colour: white / transparent
• Application: coolant reservoir (expansion tank)
• Warranty: 2-year manufacturer’s warranty

Fitting and delivery

Let the cooling system cool down, disconnect the hoses and the level sensor, swap the tank and reconnect everything. With an aluminium radiator, combine it with the original BMW return hose 11531740649. Then fill and bleed the system. Allow about half an hour of work. The tank is supplied to order; delivery takes 4 to 7 days.

A Meyle expansion tank in OEM quality that keeps the pressure in your cooling system constant, original fitment for the E39 and E38 and the logical tank for any aluminium radiator.

Why choose this Meyle expansion tank?

Meyle is one of the largest OE suppliers to BMW and this tank is identical to the original, for a fraction of the dealer price. When building a cooling system with an aluminium radiator, it is the neat, reliable solution instead of a universal tank held on with cable ties.

Frequently asked questions

Does this tank fit my E36 or E46?

Not as an original replacement, but it does as a separate expansion tank with an aluminium radiator without an internal tank. In that case you will also need a bracket and the return hose.

Is the cap included?

Please contact us for the exact contents. Always use a cap with the correct opening pressure for your system.

Which return hose goes with it?

The original BMW return hose 11531740649 from our range.

What is the delivery time?

The expansion tank is supplied to order; allow 4 to 7 days.

Delivery outside the European Union: different shipping costs may apply. Don’t worry: we will email you as soon as possible after your order and agree the shipping with you. You are not committed to anything without your consent.