2016-2019 BMW 7 Series Rear Upper Seat Belt 635775500A
Specifications
OEM number
635775500A
Position
Rear
Placement
Upper
Specs
Middle
Donor year
2016
Body style
Sedan
Fuel
Gas
Engine size
4.4 L
Transmission
Auto
Drivetrain
AWD
Suspension
Air
Trim
Xdrive m package
Donor mileage
87000
Paint code
A89 Imperial Blue Brilliant Effect
About this part
Also known as
Rear Center Seat Belt
Rear Middle Seatbelt
2nd Row Center Belt
Rear Center Safety Belt
Rear Middle Retractor
Center Restraint Assembly
Rear Middle Lap and Shoulder Belt
What this part does
The rear center Seat Belt provides primary crash restraint for the middle passenger in the second row of the vehicle. This assembly mounts in the upper rear seatback or parcel shelf area and consists of the woven webbing, the upper directional guide loop, and the inertia-locking retractor spool. The internal retractor mechanism allows the webbing to spool out and retract freely during normal passenger movement, but uses a weighted pendulum system to lock the spool instantly under rapid deceleration, heavy braking, or steep vehicle tilt.
In modern luxury platforms, this assembly communicates directly with the advanced crash management system to monitor seat occupancy and belt usage. If the vehicle is involved in a collision, the internal locking mechanism will engage permanently to protect the occupant, rendering the belt locked and unusable. A failed or deployed retractor cannot be rebuilt or serviced; the entire webbing and spool assembly must be replaced to restore safety functionality and clear restraint system warnings.
Fits these vehicles
| Make | Model | Years | Engine |
|---|---|---|---|
| BMW | 7 Series | 2016-2019 | 4.4L |
| BMW | 7 Series | 2016-2019 | 3.0L |
OEM and interchange numbers
635775500A
63 57 7 550 0A
Before you order
Confirm the 10-digit BMW part number against your original unit before purchasing. BMW utilizes different part numbers for rear restraints depending on the interior color code and specific rear seating packages (such as executive lounge seating or power-reclining rear seats). Ensure this middle upper position matches the exact belt you are replacing.
If you are replacing this unit because the original locked during a collision, be aware that installing a replacement belt will not automatically clear the airbag or SRS warning lights on the dashboard. The vehicle's crash data module will still hold a deployment code that must be cleared or reset by a qualified technician using diagnostic software. This listing includes the retractor and webbing only; the lower receiving buckle is a separate component.
