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Porsche911 & 912 (1965-1989)Heating / Air Conditioning

Heating / Air conditioning Housings

Heating / Air conditioning Housings

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DISPLAYING 17 to 24 (of 24 products)
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Support frame for water collection tray. Porsche 911 F / 912 - 90157103920
2
Support frame for water collection tray. Porsche 911 F / 912
Special Order item
90157103920
Product Information
Product Information
Support frame for water collection tray

Fits:
Porsche 911 F (1965 - 1968)

Diagram ref no 9

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90157103920
90157103920

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Support frame with retaining bar for water collection tray. Porsche 911 / 912 - 90157103920, 90157127120 - HOT11.1.112
2
Support frame with retaining bar for water collection tray. Porsche 911 / 912
90157103920/1
Product Information
Product Information
Support frame with retaining bar for water collection tray

Fits:
Porsche 911 / 912 - 1965 to 1968

Diagram ref no 9 and 10

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Related, superseded, cross reference or alternative numbers for comparison.

90157103920
90157103920
90157127120

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Water collection tray. Porsche 911 F / 912 - 90157123124
3
Water collection tray. Porsche 911 F / 912
Special Order item
90157123124
Product Information
Product Information
Water collection tray

Fits:
Porsche 911 F (1965 - 1968)

Diagram ref no 7

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90157123124
90157123124

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Water collection tray. Porsche 911 F / 912 - 90157123124 - 1628000600
3
Water collection tray. Porsche 911 F / 912
90157123124/1
Product Information
Product Information
Water collection tray

Fits:
Porsche 911 / 912 1965-1968

Diagram ref no 7

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90157123124
90157123124

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Water Drain Hose. Porsche 911 / 930 1976–89 - 91157122400
2
Water Drain Hose. Porsche 911 / 930 1976–89
Special Order item
91157122400
Product Information
Product Information

Genuine Porsche water drain hose for selected Porsche 911 and 930 fresh-air ventilation assemblies. It carries collected water away from the fresh-air inlet box through the intended drainage route.

Fits:

  • Porsche 911 1976–1977 2.7L / 1976–77 3.0 Carrera
  • Porsche 911 1978–1983 3.0L / SC
  • Porsche 911 1984–1986 3.2L
  • Porsche 911 1987–1989 3.2L G50
  • Porsche 911 1975–1977 3.0L Turbo (930)
  • Porsche 911 1978–1989 3.3L Turbo (930)


Diagram Ref No 4

Check fitment for your specific vehicle (model, year, engine) before ordering. Confirm the installation position and required hose length against the original arrangement.


What Is This Part?
This hose forms part of the water drainage arrangement associated with the fresh-air inlet box and ventilation housing. Water entering the intake area needs an unobstructed route away rather than collecting beside the blower and surrounding bodywork. The hose provides that route when correctly connected and seated. Different installations use different lengths, so matching the vehicle's existing arrangement matters as well as checking the part reference.


What Does This Part Do?

  • Provides a drainage outlet: Carries water collected in the fresh-air intake area away from the inlet box.
  • Directs moisture: Keeps drainage following its intended route rather than escaping through a damaged or disconnected hose.
  • Limits standing water: An unobstructed hose allows collected water to leave the ventilation assembly.
  • Completes the drainage arrangement: Works with the inlet box and associated connections in the applicable installation.


Why Replace This Part?
A split, hardened or damaged hose may leak before water reaches its intended outlet. A hose that has become loose or disconnected can also allow water to collect around the ventilation housing. Replacement is appropriate where deterioration prevents the hose from seating correctly or carrying water without leakage.

Slow drainage does not automatically mean a new hose is needed. Inspect for debris and check the connections first; an intact hose may only need clearing and refitting. During ventilation repairs, check the hose before reassembly rather than replacing it solely because the inlet box has been removed.


When to Replace This Part?

  • Visible damage: Splits, cracks or damaged ends allow water to escape.
  • Poor seating: Hardened or distorted ends no longer remain correctly connected.
  • Missing hose: The original drainage route is incomplete.
  • Persistent restriction: Drainage remains slow after checking for removable debris and incorrect routing.
  • Water accumulation: Standing water or dampness beside the inlet box warrants inspection of the hose and surrounding assembly.
  • Retained moisture: Musty smells alongside visible dampness are a reason to investigate drainage, not proof that this hose alone is faulty.


Where Is This Part Fitted?
Location: At the fresh-air inlet box within the front ventilation and heating assembly, connected to its water drainage arrangement.


Technical Details

  • Factory component description: water drain hose.
  • Porsche 911 1984–86 /LL installations include 520 mm and 600 mm applications.
  • Porsche 911 1987–89 installations include a 600 mm application and a 480 mm /RL application.
  • Match the applicable length and routing to the original installation; these application lengths do not describe multiple hoses supplied together.


Product Summary

  • Product: Water drain hose.
  • Brand: Porsche.
  • Part reference: 91157122400.
  • Purpose: Carries collected water away from the fresh-air inlet box.
  • Selection checks: Model year, installation position, drive-side qualification and applicable hose length.


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

91157122400
91157122400

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Water drain sleeve hose clamp. Porsche 911 / 930 Turbo 1969-86 - 99951214502 - 1628001500
2
Water drain sleeve hose clamp. Porsche 911 / 930 Turbo 1969-86
99951214502/1
Product Information
Product Information

OE Match water drain sleeve hose clamp for classic Porsche 911 applications, including the specified 930 Turbo models. 

Fits

  • Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
  • Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
  • Porsche 911 1978-1983 3.0L / SC
  • Porsche 911 1984-1986 3.2L
  • Porsche 911 1975-1977 3.0L Turbo (930)

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

What This Product Does

The clamp retains the water drain sleeve at its connection within the ventilation assembly. It is retaining hardware for the drainage connection, rather than a heater coolant hose, blower or fresh-air housing.

Functions

  • Holds the drain sleeve at its attachment point.
  • Supports reassembly of the ventilation drainage connection during repair or restoration.

Technical Details

  • Product identification: 99951214502.
  • Brand: OE Match.
  • Component: hose clamp for the water drain sleeve.
  • Assembly context: ventilation and heating system.
  • Diagram position varies with model and production period.

Symptoms of Fault

Inspect the clamp if the sleeve is loose or there is seepage around its connection. Check the sleeve and adjoining fitting too: damage to either can require attention independently of the clamp.

Why Replacement Matters

A damaged or corroded clamp may no longer retain the sleeve correctly. Renewing defective retaining hardware allows the connection to be secured during reassembly. OE Match focuses on Porsche replacement applications, with specification checks and sample evaluation forming part of its development process.

FAQs

Should a corroded clamp be renewed?
Replace it if corrosion or damage prevents correct fastening. Inspect the adjoining sleeve before reassembly.

How should compatibility be checked?
Compare part number 99951214502 with the original component and confirm the vehicle application. The diagram references identify different positions for this clamp across the listed assemblies.



Related reference numbers
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99951214502
99951214502

The product you are viewing cross references to these numbers
Water drip tray drain hose for Porsche 911 1965-68 - 90157128721, 90157128821 - 1628001300
3
Water drip tray drain hose for Porsche 911 1965-68
90157128721/1
Product Information
Product Information
Water drip tray drain hose.

Fits:
Porsche 911 / 912 - 1965 to 1968

Water drain hose from water drip tray,
Diameter - 19mm
Length - 320mm 

Diagram ref no 13

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

90157128721
90157128721
90157128821

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Water drip tray drain hose for Porsche 911 65-68 - 90157128721, 90157128821
4
Water drip tray drain hose for Porsche 911 65-68
Special Order item
90157128721
Product Information
Product Information
Water drip tray drain hose.

Fits:
Porsche 911 1965-68

Diagram ref no 13

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

90157128721
90157128721
90157128821

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DISPLAYING 17 to 24 (of 24 products)
1 2
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About Heating / Air conditioning Housings

Porsche Heating & Air Conditioning Housings | Precision Airflow & Climate System Integrity

The heating and air conditioning housing is the core structure that contains and directs airflow through your Porsche’s HVAC system. It houses essential components such as the blower motor, evaporator, heater core, and flaps — ensuring proper distribution of warm and cool air throughout the cabin. A well-sealed, correctly aligned housing maintains efficiency, airflow balance, and consistent cabin comfort.

At Design911, we offer high-quality heating and air conditioning housings designed to meet or exceed original performance standards. Built from durable, heat-resistant plastics or composite materials, these housings ensure perfect fitment, secure sealing, and long-term resistance to vibration and temperature changes.

Whether you’re restoring a classic air-cooled Porsche or maintaining a modern climate control system, our HVAC housings deliver dependable performance, improved air circulation, and precise climate regulation.

What Do Heating & Air Conditioning Housings Do?

The housing acts as the backbone of the HVAC system — securing and protecting the main components while directing air to the appropriate zones inside the cabin.

Core Functions:

  • Encases the heater core, evaporator, and air distribution components.
  • Directs airflow between heating, cooling, and defrosting circuits.
  • Maintains system pressure and ensures efficient air movement.
  • Prevents temperature loss and air leaks within the ventilation system.
  • Supports the integration of climate control sensors and actuators.

Without a properly sealed housing, the HVAC system cannot deliver balanced airflow or maintain temperature consistency, reducing comfort and efficiency.

Why Do Heating & A/C Housings Fail or Degrade?

Although built for durability, housings are exposed to constant vibration, temperature fluctuations, and moisture — all of which can lead to wear or structural failure over time.

Common Causes of Failure Include:

  • Cracked or warped plastic due to heat cycles.
  • Damaged mounting points or seals causing air leaks.
  • Corrosion around metal fasteners or brackets.
  • Blockages or debris buildup restricting airflow.
  • Misalignment from improper servicing or accident damage.
  • Blockages or debris buildup restricting airflow.
  • Misalignment from improper servicing or accident damage.

A damaged housing can cause weak airflow, inconsistent heating or cooling, and unwanted cabin noise.

Why Replace Your Porsche Heating / A/C Housing?

Replacing a cracked or leaking housing restores correct airflow, seals, and structural integrity within your HVAC system — ensuring reliable temperature control and quiet operation.

Key Benefits:

  • Restores efficient airflow and proper temperature regulation.
  • Prevents air leaks and loss of heating or cooling performance.
  • Ensures secure mounting for HVAC components.
  • Reduces cabin noise and vibration.
  • Compatible with Porsche 911, Boxster, Cayman, Panamera, Macan, Cayenne, and classic models.
  • Ideal for restorations, climate system rebuilds, or preventative maintenance.

Upgrading to a new housing ensures the internal components operate within proper tolerances and extends the lifespan of blower motors, evaporators, and heater cores.

Highlights

  • Precision-engineered Porsche HVAC housings for perfect airflow control.
  • Designed from durable, heat-resistant materials for long-term use.
  • Prevents leaks, vibration, and airflow loss.
  • Direct-fit replacements for modern and classic Porsche models.
  • Ideal for climate control system rebuilds and restorations.
  • Maintains optimal heating and cooling efficiency.       

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