WARMING THE ENGINE…
Circuit flow · OE cross-ref 11518600442
The quiet constant of every water-to-air system: the auxiliary electric pump that moves coolant through the charge cooler and heat exchanger. A weak pump starves the circuit long before anything else looks wrong — heat soak with good parts is almost always flow. Direct OE-replacement pump for the S55 and B58 charge-cooling circuits.
| Platform | S55 / B58 |
|---|---|
| Years | 2014+ |
| Models | S55 and B58 water-to-air charge-cooling circuits |
| Notes | Auxiliary electric coolant pump for the charge-cooler circuit (OE cross-ref 11518600442). |
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