WGBAB Coolant Thermostat Housing Assembly with Sensors — N20 2.0L

Where cheaper alternatives cut corners by omitting the sensors, this WGBAB assembly ships as a complete unit — sensors included. That means fewer parts to source, fewer potential leak points from mismatched components, and a faster turnaround on the repair. Fitment is verified against multiple OE part numbers including 11538648791, 11538635689, 11537633476, 11537588257, and 11538636594, so cross-referencing your existing part before ordering takes seconds.

Constructed from reinforced materials engineered to meet or exceed OEM specifications, this housing isn't a temporary patch — it's a proper, long-term solution. The direct-fit design means no drilling, trimming, or adapter hardware; it seats exactly as the factory unit did. For DIYers comfortable with basic cooling system work, this is a clean, confidence-inspiring swap.

Ignoring a compromised thermostat housing on an N20 BMW is a gamble that rarely pays off — overheating damage to the engine, head gasket, or auxiliary cooling components can turn a modest repair into a five-figure bill. The WGBAB assembly addresses the failure point directly, restoring stable operating temperatures and protecting the rest of your drivetrain without the dealership labor premium.