BMW N54 335i Billet Water Hose Fitting 11537541992 11537544638 | MTC Motorsport


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MTC Motorsport BMW N54 335i 11537541992 11537544638 Billet Water Hose Fitting
This is an OEM replacement for the plastic fitting on BMW with part number 11537541992 and 11537544638.
It fits the N54, N53 and N52 3.0-litre motors. This BMW part consists of a 25mm hose and a plastic fitting.

N54 3.0L twin-turbo motors 335i, 335xi, 135i
N53 (3.0L non-turbo) 2006 – 2010 325i, 330i, 525i, 525xi, 528i, 528xi, 530i, 530xi
N52 X3
N20 (2.0L turbo) Z4 2013
Also fits the N55 engines using a slightly thinner O ring

This hose runs from the coolant thermostat housing to the front of the head. The plastic fitting on this hose is a known weak spot in the coolant system as it commonly cracks and leaks.

The ideal solution to the problem is to replace the fitting with one that will never wear-out, crack or leak. This fitting is a direct replacement for the stock plastic fitting with no modification to any part of the system necessary.
You just remove the end of the hose from the plastic fitting and then the fitting from the head. Then install the replacement aluminium fitting to the head and slide the hose and hose clamp over the fitting.
This is machined from billet aluminium 6061, we also supply it in bare aluminium.

Shipping Continents: Europe

Shipping Countries: United Kingdom (UK)


Shipping Policy

MTC Motorsport ships Monday-Friday excluding holidays. The shipping cut-off time is 13:30pm (GMT). Orders placed after 13:30pm will be processed the next business day. All orders will be shipped express, usually arriving within 24 hours (UK only).

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UK: next day


Refund Policy

We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

To be eligible for a return, your item must be in the same condition that you received it, unused and in its original packaging. You’ll also need the receipt or proof of purchase.

To start your return or for any returns queries, please contact us at [email protected].

Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

Please note, to offset the cost of order processing, the customer will be charged a restocking fee by MTC Motorsport on all returned goods unless we accept liability for any unsuitable or faulty item. An amount of 10% of the purchase price plus the original postage will be applied.

Weight 1 kg
Product Brand

MTC Motorsport

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