Rein Rein B46 Coolant Expansion Tank Hose - 17127535528 - G01 X3 sDrive30i X3 xDrive30i, G02 X4 xDrive30i 17127535528

Rein B46 Coolant Expansion Tank Hose - 17127535528 - G01 X3 sDrive30i X3 xDrive30i, G02 X4 xDrive30i

This hose connects the cylinder head to the expansion tank's upper port. If your coolant expansion tank hose is cracked or leaking, replace it early to prevent further coolant loss and eventual overheating.
Rein Rein
T#: 45757474 | Part#: 17127535528
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Rein Rein B46 Coolant Expansion Tank Hose - 17127535528 - G01 X3 sDrive30i X3 xDrive30i, G02 X4 xDrive30i 17127535528
Rein B46 Coolant Expansion Tank Hose - 17127535528 - G01 X3 sDrive30i X3 xDrive30i, G02 X4 xDrive30i
$51.99

In high-stress track environments and spirited street driving, your cooling system is only as reliable as its weakest link. The Rein Engine Coolant Hose is engineered to eliminate failure points, ensuring optimal thermal regulation when track temperatures spike. Produced by an industry-leading OE manufacturer, this hose is designed as a direct-fit replacement that meets or exceeds factory specifications for fitment, pressure resistance, and durability.

For teams and drivers who refuse to compromise on reliability, the Rein delivers peace of mind from the paddock to the checkers.

Key Technical Features

  • Premium EPDM Construction: Molded from high-grade Ethylene Propylene Diene Monomer (EPDM) rubber to resist heat, ozone, and electrochemical degradation—the leading causes of premature hose failure.

  • Reinforced Tensile Strength: Features an internal braided reinforcement layer engineered to withstand high-pressure cooling system spikes without expanding or collapsing.

  • Exact OE Geometry: Precision-molded to match original equipment routing perfectly. This guarantees zero interference with belts, pulleys, or chassis components, eliminating abrasive wear points.

  • Resistant to Aggressive Additives: Chemically optimized to withstand modern organic acid technology (OAT) and hybrid organic acid technology (HOAT) coolants, preventing internal scaling and softening.


Prop 65 WarningProp 65 Warning

Cross Reference
  • CHE0943
  • 17127535528

Product Q&A

Lifetime Replacement

This product is not eligible for Lifetime Replacement
MAKE MODEL SUBMODEL ENGINE Special Fitment Notes
BMW G01 X3 sDrive30i B46 2.0L For Pre-LCI models with the earlier Gen1 B46 engine only
BMW G01 X3 xDrive30i B46 2.0L For Pre-LCI models with the earlier Gen1 B46 engine only
BMW G02 X4 xDrive30i B46 2.0L For Pre-LCI models with the earlier Gen1 B46 engine only
*The above product applications have been written by Turner Motorsport. All warranties, product application, fitment, and performance are the responsibility of Turner Motorsport. For additional information see the terms of use.