Heating and Cooling› Overflow Tanks and Catch Cans

BMW Genuine Parts

Expansion Tank Hose

$64.26

SKU: 11537500735

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

This hose connects the additional water pump to the expansion tank, facilitating coolant flow between the engine's cooling system and the coolant reservoir.

This component is crucial for maintaining proper coolant levels by allowing excess coolant to overflow into the reservoir when the engine heats up and contracts as it cools. A functional expansion tank hose is vital to prevent overheating and ensure optimal engine performance.
Show original supplier description
The Genuine BMW Expansion Tank Hose (part number 11537500735) is an OE-quality replacement part engineered to connect the additional water pump directly to the coolant expansion tank in compatible BMW vehicles. This hose plays a critical role in the cooling system's operation, managing the expansion and contraction of coolant as the engine temperature fluctuates. Its primary function is to transport excess coolant from the radiator to the reservoir when the engine is hot and coolant expands. Conversely, as the engine cools, the hose allows coolant to return from the reservoir to the radiator, ensuring the system maintains the correct fluid level. This continuous circulation is essential for preventing engine overheating and maintaining optimal operating temperatures. Symptoms of a failing coolant reservoir hose include coolant leaks, engine overheating, and potentially the illumination of the check engine light due to issues with coolant temperature or level monitoring systems. This Genuine BMW hose is specifically designed for the E53 X5 chassis with the M54 3.0L engine, ensuring a precise fit and reliable performance. This product is backed by a Lifetime Replacement Program, offering enduring coverage for as long as you own the vehicle.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandBMW Genuine Parts
Part Number11537500735
CategoryHeating and Cooling

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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