Control vent heater box. Porsche 911 / 912 / 912E 1969-89  ›  91157134701

This Wiesner Classic heater-box control vent is an air distributor for the heating and ventilation assembly on selected Porsche 911, 912 and 912E models. Can be used for Left or Right.

Sold each - 2 required per car

Fits

• Porsche 911 - 1969 to 1989
  
• Porsche 911 turbo - 1975 to 1989
  
• Porsche 912 - 1969 to 1976
• 912E 4CYL 1976
  
  

Check fitment for your specific vehicle (model, year, engine) before ordering. 

Diagram ref no 20

What This Product Does

The vent forms part of the air-distribution assembly, helping direct ventilation and heating airflow. It is intended for work on the heater-box distribution components rather than the refrigerant circuit.

Functions

• Directs air through the heating and ventilation assembly.
• Supports control of cabin airflow distribution.
  
  

Technical Details

• Internal diagrams identify the component as an air distributor.
• Diagram identifier 91157134701 appears with the marking /L.
• Diagram identifier 91157134801 appears with /R and, for the M559 application, /LL.
  
  

Symptoms of Fault

Restricted or inconsistent airflow, sticking adjustment and rattling can justify inspection of the distribution assembly. Check the associated connections and fixings before identifying the vent as the cause.

Why Replacement Matters

Renewing a damaged distribution component can help restore airflow control during a heating-system repair or classic-car restoration. Inspect accessible seals, clips and fixings at the same time.

FAQs

• How should compatibility be checked?
  Compare the vehicle's model and production year with the application details, then check the original component and relevant diagram identifiers.
• How many are needed?
  Each unit is supplied individually; two are required per vehicle.

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91157134701

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