Heating and Cooling› Thermostats, Housings and Fillers

Rein

Radiator Coolant Hose Flange

$65.99

SKU: CHK0940

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Rein CHK0940 is a radiator coolant hose flange designed for specific BMW models. This aluminum flange features a 45-degree fitting angle and male push-on attachments, intended for installation between the engine block and the radiator. Rein Automotive focuses on OE quality replacement parts, specializing in maintenance wear items.
Show original supplier description
The Rein Automotive CHK0940 is a radiator coolant hose flange constructed from aluminum, featuring a 45-degree fitting angle and male push-on attachments. Rein Automotive aims to provide OE quality replacement parts, with a specialization in coolant hoses and other common maintenance wear items. Their commitment to high OE standards ensures that components like the CHK0940 meet rigorous manufacturing specifications. This coolant hose flange is specifically designed to fit a range of BMW models equipped with the B58 3.0L engine, including the 340i, 440i, 540i, 740i, M240i, X3 M40i, and X4 M40i, with model years generally ranging from 2016 to 2021, depending on the specific vehicle and trim. It is crucial to use the vehicle selection tool to confirm exact fitment for your particular BMW. As with many engine components, proper installation is key. While the part is designed as a direct, bolt-on replacement, professional installation is recommended to ensure correct sealing and long-term performance. Compatibility notes are critical; always verify your vehicle's specific requirements against the application information provided.
Vehicle Symptoms
  • Coolant puddle under engine bay
  • Low coolant warning light on dash
  • Engine temperature rising above normal
  • Visible crack or break on coolant hose flange
  • Sweet smell of coolant inside cabin or near engine
Relevant Conversations
  • BMW B58 coolant leak at hose flange
  • Rein CHK0940 radiator hose flange review
  • Coolant hose flange replacement cost BMW 340i
  • BMW 440i low coolant no visible leak
  • Where is coolant hose flange on B58 engine
  • BMW X3 M40i overheating after coolant loss
  • Rein vs OEM coolant flange for BMW
  • BMW 540i coolant flange cracked symptoms
  • How to replace radiator coolant hose flange B58
  • BMW M240i coolant leak passenger side engine

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

BrandRein
Part NumberCHK0940
CategoryHeating and Cooling
5,000+ Trusted brands
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(760) 282-4645 hello@motormia.co

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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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