Original Porsche Part Genuine Porsche part 90157206330

Code: 90157206330

Genuine Porsche part

Original Porsche Part

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Heater Tube Repair Set, Rear Chassis Side Member. Porsche 911 1965-73

90157202

Product Information

Heater Tube Repair Set, Rear Chassis Side Member.
This Heater Tube is a direct replacement for Porsche early air-cooled 911/912 models. Designed to sit inside the longitudinal/frame member, this 2-piece tube assembly routes warm air from the engine’s heat exchangers through the chassis and into the interior heater system.

Fits:

Porsche 911 1965-1968 2.0L / 912 SWB (F)
Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)

Diagram Ref No 14 And 16

What This Product Does:

They route warm air from the engine’s heater outlets through the car’s inner rocker / longitudinal frame members toward the front cabin heater system.
Inside the sill/longitudinal structure, they form part of the air path that carries warmed air (generated by the heat exchangers on the engine) forward into the cabin ventilation ducts under the dash.
Once the warm air reaches the front heater box area, it continues through other hoses and flaps to the vents, footwells and windscreen demisters.

Symptoms Of Wear Or Failure:

Even with the heater turned on, you’ll get little to no warm air into the cabin because the tube is rusted through, leaking, or blocked.
One side of the car may blow warmer than the other if only one tube is damaged (left or right).
If the tube is crushed, collapsed, or internally corroded, airflow can be restricted, causing weak blower/heater output.
Failed tubes can contribute to moisture buildup inside the longitudinal, which can cause musty smells and accelerate corrosion in the surrounding structure.
Since these tubes help deliver warm air forward, failure often shows up as weak windscreen demist performance, especially in cold or wet weather.

Why Replacement Matters:

Replacing a failed heater tube ensures that the cabin gets heated air as originally intended, improving driver comfort and safety in cooler weather.
Rust and deterioration inside the frame member can worsen over time. A compromised tube may allow moisture and corrosion to spread, damaging surrounding components.
For classic car restorations, keeping systems like the heating ductwork correct and complete helps preserve authenticity and value — especially important with vintage Porsches.

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Related, superseded, cross reference or alternative numbers for comparison.

90157202

90157221121

90157202324

90157202424

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Original Porsche Part Genuine Porsche part 90157206330