Bmw Coolant Thermostat Unit Genuine Part 11538642

BMW Engine Coolant Thermostat Assembly (Heat Management Module) OEM Replacement Part Number 11538642559 Fits BMW Models with B58 / B58B30 Engines (20192026) Upgrade your BMWs cooling system with this OEM-spec Heat Management Module (Coolant Thermostat Assembly). This unit is manufactured to match BMWs original design specifications but is not a Genuine BMW-branded part.

It offers precise control of coolant flow for modern B-series engines and restores proper temperature regulation for optimal engine performance. This OEM unit includes the required sealing O-rings and gaskets for installation. Key Features OEM-Spec Replacement Matches the function and design of the original BMW part Not Genuine BMW Third-party manufactured to OEM standards Includes O-Rings & Gaskets Ready for installation Precision Temperature Control Supports rapid warm-up and efficient cooling Designed for BMW B58/B58B30 Engines Direct Fit Replacement NO WARRANTY PROVIDED UNLESS FITTED BY RMI APPROVED WORKSHOP Product Description This Heat Management Module (HMM) is an electronically controlled coolant thermostat used in BMWs B-series engines.

Instead of a simple open/close valve, it uses a rotary coolant control valve that adjusts flow dynamically for precise heat regulation. Common Symptoms of Failure Engine overheating Engine running hotter than normal Long warm-up time Cooling system fault messages Diagnostic codes: 20F220, 20F206, 20A704 Replacing a faulty HMM restores correct coolant circulation and helps prevent engine damage.

Vehicle Compatibility BMW X5 (G05) 20192023 xDrive40i (B58B30M0) sDrive40i (B58B30M0) xDrive45e (B58B30M1 PHEV) BMW X7 (G07) 20192022 xDrive40i (B58B30M0) BMW 540i / 540i xDrive 20202023 RWD & AWD Gas and Mild Hybrid versions Engines: B58B30M0 / MHEV BMW 740i / 745e 20202022 740i / 740i xDrive 745e PHEV BMW 8 Series (840i / 840i xDrive / Gran Coupe) Models 20202026 Coupe, Convertible, Gran Coupe B58B30M0 engines BMW M340i / M340i xDrive 20202024 B58B30O1 engines RWD, AWD, and MHEV models BMW X3 M40i 20202024 B58B30O1 BMW X4 M40i 20202025 B58B30O1 BMW X6 40i 20202023 B58B30M0 engines BMW Z4 M40i 20202026 B58B30O1 engines BMW M240i / M240i xDrive 20222025 B58B30O1 / B58B30M0 engines Package Includes 1 * OEM Engine Coolant Thermostat Assembly (Heat Management Module) Included: O-rings & gaskets Important Notes This is an OEM replacement, NOT a Genuine BMW part Professional installation is recommended to activate warranty Always verify fitment using your vehicles VIN