The Power Unit handles the change of speed on the interior cabin blower. It often fails due to age and the amount of current it handles. Ferrari part number 63307200 has been discontinued, this aftermarket replacement is engineered to deliver 100% plug-and-play operation with no modification to wiring or connectors.
The two harness plugs fit and securely lock into the new unit, just as the original did.
The replacement looks slightly different on the outside, but offers identical performance and full compatibility with your 348 or 355.

True plug and play
Both harness plugs fit and lock, no wiring changes

1-year warranty
Covered for material and internal defects

Tested before shipping
Every unit is quality-controlled before it leaves

High-quality aftermarket
Engineered to match OEM form, fit, and function

Common symptoms of a failing power unit:

No cabin blower operation at all
The fan fails to blow any air through the vents, a sign of complete power loss from the regulator to the blower motor.
Only certain blower speeds work
The fan responds only to specific settings, for example, working only on high or low, with intermediate speeds non-functional.
Erratic cabin blower speed
Airflow varies in intensity or comes out in unpredictable bursts instead of a consistent, controlled speed.
Fan runs constantly
A continuously running fan, even when the car is off, indicates a faulty regulator and can lead to battery drain.

Part Number

63307200

Location & Installation

The Power Unit is located in the front trunk compartment, attached to the evaporator box assembly directly under the cabin blower. When replacing the unit, do not overtighten the screws, the plastic housing is delicate and threads can strip easily.

Frequently Asked Questions

Is this unit compatible with my 348 or 355?

Yes. This unit is 100% guaranteed to fit and work with your 348 or 355, covering all compatible variants from 1993 to 1999.

Is this part aftermarket?

Yes. This is a high-quality aftermarket replacement. We test and quality-control each unit before it is sent out to guarantee you receive a fully operational part.

Do I need to make any modifications for installation?

No. The part is 100% plug and play, no modification is required. Both harness plugs fit the receptacles in the new unit and securely lock in place.

What's the warranty on the new unit?

The unit is covered by a 1-year warranty for any material or internal defects.

Not sure if this is your issue? Call us before you order.

(954) 652-1496

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Ferrari 355 (1993)