FERRARI PUROSANGUE F175 Flywheel 917179

In 2026, the part number 917179 identifies the Flywheel for the Ferrari Purosangue (Project F175).

Because the Purosangue utilizes a high-revving $6.5\text{L V12}$ engine paired with a rear-mounted 8-speed Dual-Clutch Transmission (DCT), the flywheel serves as the critical coupling between the engine’s crankshaft and the torque tube.

1. Technical Identification

• Part Number: 917179

• Vehicle Application: Ferrari Purosangue (2023–Present).

• Type: Dual-Mass Flywheel (DMF).

• Function: Unlike a simple single-mass flywheel, this unit contains internal springs and dampers designed to absorb the torsional vibrations of the massive V12. This ensures that the power delivery to the transaxle is smooth, which is vital for the Purosangue’s “luxury” touring characteristics.

2. 2026 Market Pricing (Estimated USD)

This is a high-precision, heavy-duty component. In 2026, most replacements are performed under warranty or via specialized Ferrari service centers.

3. Why Replace the Flywheel?

On a V12 Ferrari like the Purosangue, the flywheel is rarely a “wear item” unless the car is driven extremely hard. However, in 2026, replacements are usually triggered by:

• Dampening Failure: If the internal springs of the dual-mass system weaken, you will feel a distinct vibration through the chassis at idle or low RPMs.

• DCT Issues: If the Dual-Clutch Transmission experiences a major failure or “clutch drag,” the heat generated can warp the face of the flywheel.

• Crankshaft Seal Leak: If the rear main seal of the V12 leaks oil onto the flywheel, it can contaminate the surface and cause slipping or uneven power delivery.

4. Critical Installation Notes

• The Torque Tube Factor: To access the flywheel 917179, the Purosangue’s entire rear-mounted transaxle and the central torque tube must be decoupled. This is a massive labor undertaking (typically 15–20 hours of work).

• Stretch Bolts: The bolts that secure the flywheel to the crankshaft are single-use stretch bolts. Reusing old bolts can lead to a catastrophic engine failure if they shear under the torque of the V12.

• Pilot Bearing: It is standard practice in 2026 to replace the pilot bearing and the rear main seal simultaneously while the car is “split open” to save on future labor costs.