For the Bentley Mulsanne (2010–2020), part number 3Y0853617 refers to the iconic “Flying B” Retractable Bonnet Mascot assembly. This is the sophisticated, motorized ornament that electronically deploys and retracts into the radiator shell.

1. Product Specifications & Features

The Mulsanne was the only model in the Bentley lineup to carry this specific upright mascot until the release of the new Flying Spur.

• Mechanism: This is an elevating mechanism (often motorized) rather than a simple static badge. It is designed to retract automatically for safety (pedestrian protection) or security (anti-theft).

• Material: The mascot itself is typically cast from high-grade 316 stainless steel and hand-polished to a mirror finish.

• Safety Integration: The unit is linked to the vehicle’s electrical system. It can be controlled via the infotainment screen to stay up or remain stowed.

2. Part Number Variations

Depending on the year of your Mulsanne and the specific trim (e.g., standard Chrome vs. Blackline), you may see different suffixes:

• 3Y0853617G / 3Y0853617GU: Most common for 2011–2020 models. The “GU” suffix often identifies a recycled or reconditioned genuine part.

• 3Y0853617H: Often listed as the complete assembly including the upper radiator grille interface for later models.

• Color/Finish: While Chrome is the standard, the 2018+ Blackline Specification uses a Gloss Black version of the B mascot.

3. Installation & Repair

Note: Because this is a motorized assembly, installation is complex.

• Programming: After replacement, the car’s Central Electrical Module may need to be “taught” the new unit’s end-stops via Bentley ODIS software so it retracts smoothly without straining the motor.

• Repair Kits: If only the “B” itself is damaged but the motor still works, Bentley offers a Mascot Tool Repair Kit (3Z5853617) which is significantly cheaper than the full assembly.