MITZONE Coolant Thermostat Housing Assembly — B46/B48 2.0L
by MITZONE
Key Features
- Complete assembly includes housing, bolt, O-rings, and pre-installed coolant temperature sensor
- Engineered for BMW B46/B48 2.0L engines across F- and G-chassis platforms (2017–2021)
- Reinforced plastic construction matches OE material spec for direct bolt-on replacement
- Regulates coolant flow to radiator, maintaining optimal engine operating temperature
- Covers 15+ BMW models including 230i, 330i, 430i, 530i, 530e, 740e, X3, and X4
- Verify fitment via model year and OE part number cross-reference before purchasing
Product Details
- Brand
- MITZONE
- Part #
- 001-1143
- Category
- Thermostats & Housings
- ASIN
- B0CNRJBCKF
Check if it fits your BMW
MITZONE Coolant Thermostat Housing Assembly — B46/B48 2.0L — Overview
The thermostat housing on BMW's B46 and B48 2.0L engines is a known wear item — and when it fails, coolant leaks, erratic temperature gauge behavior, and potential overheating follow quickly. MITZONE's replacement assembly is purpose-built for this engine family, spanning a wide range of F- and G-chassis models from 2017 through 2021, including the 230i, 330i, 430i, 530i, 530e, 740e xDrive, X3 sDrive30i/xDrive30i, and X4 xDrive30i.
What sets this kit apart from sourcing individual components is the completeness of what's in the box: the thermostat housing itself, the mounting bolt, fresh O-rings, and a coolant temperature sensor that arrives pre-installed and ready to go. There's no need to transfer your old sensor or source additional hardware — everything required for a clean swap is included. The housing is molded from reinforced plastic consistent with BMW's original equipment specification, ensuring a direct bolt-on fit without modification.
Functionally, the thermostat housing is the gatekeeper of your engine's thermal management — it controls how much coolant enters the radiator circuit and keeps the engine within its designed operating temperature window. A compromised housing doesn't just cause leaks; it can throw off coolant flow regulation and accelerate engine wear over time. Replacing it promptly with a proper OE-spec unit restores accurate temperature control and protects the long-term health of your B46 or B48.
Before ordering, take a moment to cross-reference your vehicle's model year and OE part number against the fitment data — the B46/B48 platform covers a broad spread of body styles and configurations, and confirming compatibility upfront ensures a hassle-free installation.
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