Heating and Cooling› Overflow Tanks and Catch Cans

Mercedes-Benz

Coolant Breather Pipe

$107.75

SKU: MB1665001091

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
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Easy — 1–2 hours

Overview

The Mercedes-Benz Coolant Breather Pipe is a direct replacement part for your vehicle's cooling system. It connects the expansion reservoir to the cooler, ensuring proper coolant flow and pressure balance.
Show original supplier description
The Mercedes-Benz Coolant Breather Pipe, part number 1665001091, is an OEM replacement component designed to ensure the integrity of your vehicle's cooling system. This pipe functions to connect the coolant expansion reservoir to the radiator or cooler, facilitating the necessary circulation and pressure management for optimal engine temperature regulation. This genuine Mercedes-Benz part is compatible with a range of models, including various iterations of the GL450, GL550, GL63 AMG, GLE63 AMG, GLE63 AMG S, and GLS models. Specific fitment includes vehicles such as the GL450 Base Sport Utility 4.7L V8 (Chassis 166.872) from 2013-2014, the GL550 4Matic Sport Utility 4.7L V8 (Chassis 166.873) from 2013-2016, and the ML550 Base Sport Utility 4.7L V8 (Chassis 166.073) from 2012-2014, among others. A comprehensive list of compatible models and years can be found in the product's fitment details.

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

BrandMercedes-Benz
Part NumberMB1665001091
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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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