Updated in 2021 for easier install. Still the same quality you're used to, but now in an easier to install package.
The rubber "U" shaped hose connecting the water pump to the thermostat is a well-known failure point. The hard bends in the stock hose always end up cracking and leaking, but since the water pump thermostat assembly is tucked up above the subframe, it can be difficult to pinpoint the leak. When you upgrade your OE rubber hose to the ECS aluminized silicone hose, you don't just get a longer lasting, more flexible hose, but also one that's better suited to withstand high underhood temperatures. Due to this hose's proximity to the downpipes, it's subject to higher heat levels than other underhood hoses. It's subjected to extreme heat almost the entire time the car is being driven, as well as during cool-down when the car is parked. While BMW installed a small heat shield from the factory, it's ill-suited to withstand the temperatures placed on this hose.
ECS set out to beat the heat, using silicone because of its more pliable nature as well as its resistance to heat. The next step was wrapping it with aluminum to offer further protection from the exhaust system and keeping the coolant flowing at a more consistent temperature as it passes through this hose.
When performing this upgrade, it's an ideal time to replace the water pump and thermostat. Recommended replacement at 60,000-80,000 intervals.
Cross Reference
11537545665, 11537521049
This Part Fits the Following Vehicles
Make Model Submodel Engine
BMW E60 525i N52 3.0L
BMW E60 525xi N52 3.0L
BMW E60 528i N52 3.0L
BMW E60 528xi N52 3.0L
BMW E60 530i N52 3.0L
BMW E60 530xi N52 3.0L
BMW E60 535i N54 3.0L
BMW E60 535xi N54 3.0L
BMW E61 530xi N52 3.0L
BMW E61 535xi N54 3.0L
BMW E70 X5 xDrive30i N52 3.0L
BMW E71 X6 35iX N54 3.0L
BMW E71 X6 xDrive35i N54 3.0L
BMW E82 1 M Coupe N54 3.0L
BMW E82 128i N52 3.0L
BMW E82 135i N54 3.0L
BMW E82 135i N55 3.0L
BMW E83 X3 N52 3.0L
BMW E84 X1 xDrive35i N55 3.0L
BMW E88 128i N52 3.0L
BMW E88 135i N54 3.0L
BMW E88 135i N55 3.0L
BMW E90 325i N52 3.0L
BMW E90 325xi N52 3.0L
BMW E90 328i N52 3.0L
BMW E90 328xi N52 3.0L
BMW E90 330i N52 3.0L
BMW E90 330xi N52 3.0L
BMW E90 335i N54 3.0L
BMW E90 335i N55 3.0L
BMW E90 335xi N54 3.0L
BMW E90 335xi N55 3.0L
BMW E91 325xi N52 3.0L
BMW E91 328i N52 3.0L
BMW E91 328xi N52 3.0L
BMW E92 328i N52 3.0L
BMW E92 328xi N52 3.0L
BMW E92 335i N54 3.0L
BMW E92 335i N55 3.0L
BMW E92 335is N54 3.0L
BMW E92 335xi N54 3.0L
BMW E92 335xi N55 3.0L
BMW E93 328i N52 3.0L
BMW E93 335i N54 3.0L
BMW E93 335i N55 3.0L
BMW E93 335is N54 3.0L
BMW Z4 3.0i N52 3.0L
BMW Z4 3.0Si N52 3.0L
BMW Z4 sDrive30i N52 3.0L
BMW Z4 sDrive35i N54 3.0L
BMW Z4 sDrive35is N54 3.0L