Mercedes Sprinter Differential Drive Pinion Nut – Febi | NCV3 | #9069900253 (2007–2018)

The differential drive pinion nut is the single fastener that secures the pinion flange to the differential's drive pinion shaft — and it is a one-time-use item that must be replaced every time the flange is removed. This is the Febi differential drive pinion nut for NCV3 Sprinters, a precision-threaded flanged nut that must be replaced with a new unit any time the pinion flange is disturbed for pinion seal replacement, bearing service, or driveshaft work.

What This Part Does

The drive pinion nut is a flanged, fine-thread nut that threads onto the pinion shaft and clamps the pinion flange (yoke) against the pinion bearing preload spacer. The torque applied to this nut — which is substantial, typically in excess of 200 Nm — sets the pinion bearing preload that determines how tightly the tapered roller bearings are loaded against each other. This preload is critical to the differential's noise, bearing life, and overall function. The nut is specifically designed to deform slightly at installation torque — creating a prevailing torque effect that prevents the nut from backing off under the cyclic loads of driveline operation. Because the nut deforms during installation, it cannot be reused; a used nut torqued to specification on a new pinion will not develop the same prevailing torque and can back off in service.

Common Reasons for Replacement

• Pinion flange removed for pinion seal replacement
• Differential opened for ring and pinion, bearing, or seal service
• Driveshaft removal where the pinion flange is disconnected

When to Replace

Replace every time the pinion flange is removed — without exception. Never reuse a pinion nut. Always torque to the specified value and check pinion bearing preload with a torque wrench before final assembly.

NCV3 Specific — VIN Verification Required

This pinion nut is for NCV3 Sprinters (W906). Always verify by VIN and confirm your rear axle specification before ordering. Contact us and we'll confirm fitment before you buy.

Fitment

• 2007–2018 Mercedes-Benz Sprinter 2500 – Rear differential (NCV3/W906)
• 2007–2018 Mercedes-Benz Sprinter 3500 – Rear differential (NCV3/W906)
• 2007–2009 Dodge Sprinter 2500 / 3500 – Rear differential (NCV3)
• 2007–2018 Freightliner Sprinter 2500 / 3500 – Rear differential (NCV3)

✔ Single-use — never reinstall a used pinion nut
✔ Always replace whenever the pinion flange is removed
✔ Replace with pinion seal (0159970346) as a set

Part Numbers

• Mercedes OEM: 9069900253 / A9069900253 / 906-990-02-53
• Manufacturer: Febi — 44736
• SKU: 9069900253