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Over time, road grime, salt, and moisture take a toll on the factory rear leveling rod. The original equipment often corrodes, seizes, and eventually snaps—or worse, binds up and breaks your expensive headlight leveling sensor. With this issue in mind, ECS has engineered a heavy-duty, bulletproof solution designed to outlast the car it’s installed on.
Instead of brittle OE plastic that degrades and snaps over time, this rod is constructed from high-strength, flexible polyurethane. Paired with corrosion-resistant stainless steel ball studs, it guarantees smooth articulation and prevents the binding that destroys expensive sensors. Precision-manufactured for a perfect, bolt-on fit, this upgrade requires zero modifications to replace your fragile OEM unit.
This is a direct-fit replacement for Genuine BMW part number 37146752797, restoring proper suspension-to-sensor geometry so your headlights adjust perfectly to changing loads and road conditions.
Upgrading your cooling system or replacing old, brittle rubber hoses? Don't just replace them—upgrade them. This silicone coolant outlet hose from ECS Tuning delivers perfect OEM fitment with superior heat tolerance and a longer service life. Unlike standard rubber, which softens and degrades from constant heat cycles, high-grade silicone is built to last. Give your cooling system the reliability it deserves.
This hose connects the outlet on the thermostat housing to the front of the cylinder head. It replaces OEM BMW part number 11537584549.
This product was last offered at the strikethrough price on
06-30-2026
The perfect upgrade for the connection between your thermostat and cylinder head. Designed with durable silicone and billet aluminum to greatly outlast the OE rubber-and-plastic combination.
Some of the weakest points in BMW cooling systems can be the OE plastic fittings, which break down from constant temperature changes, softening these components. When this happens, even simply moving the hose slightly could cause the fitting to crack, causing the coolant to leak all over. The ECS design silicone hose with billet aluminum adapter retains OE fitment with superior strength to not only handle the performance, but also stand up to the wear and tear of a daily driver.
Features:
Manufactured from billet 6061-T6 and type III anodized for exceptional durability and corrosion resistance.
Much stronger part than OEM plastic
Will not become brittle and fatigue over time due to thermal cycling. This will prevent the part from breaking during removal and reinstallation.
Constructed of 4-ply reinforced silicone for improved durability over the failure-prone OE rubber hose. Fluorosilicone-lined internal layer for exceptional chemical resistance. Silicone offers reduced thermal conductivity as well as improved resistance to ozone and UV degradation for improved performance and durability. Follows OEM form for perfect fitment. Utilizes OEM O-ring 11537545278 to ensure a proper seal. Replaces Genuine BMW Part Number: 11537584549