Rear heater blower unit. Porsche 911 1974-83  ❭  91162415103

Rear heater blower unit, with steel housing. Fits in the engine bay.
The 91162415103 rear heater blower motor is a direct-fit replacement for the engine-compartment heater fan used on classic 911/930 models. It drives warm air from the heat exchangers forward to the cabin, restoring strong, reliable heating performance. 

Fits:
Porsche 911  2.7L / 3.0L  1974 - 1983

Diagram ref no 1

This later-style unit supersedes the earlier 911 624 151 02 design and is supplied complete with the correct housing/impeller layout for straightforward installation.

Mounted in the engine bay on the left side, it draws air through the heat exchangers and feeds the heater ducts; without a healthy motor, cabin heat output and demist performance drop sharply.

Age and heat can seize bearings, burn brushes, or crack housings—leading to weak/no airflow, noisy operation, or blown fuses. Replace during HVAC refresh or whenever the fan is noisy/inoperative to restore safe demisting and cabin heat.

•  Replaces: Porsche 911.624.151.03 / 911.624.151.02
•  Position: Engine bay – left-hand side
•  Function: Draws warm air from heat exchangers and delivers it into cabin ducts
•  Installation: Direct-fit replacement – no modifications required
•  Common Symptoms of Failure: No cabin heat, fan noise, burnt smell, blown fuse
•  Benefits: Restores cabin heating, correct airflow, and safe demisting performance

Related reference numbers
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