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Pelican Technical Article:

Seat Removal

Nick Czerula

Time:

2 hours2 hrs

Tab:

$100

Talent:

***

Tools:

16mm wrench, 16mm socket and long extension, plastic trim tool

Applicable Models:

BMW Z4 Convertible (2003-06)
BMW Z4 Coupe (2006)

Hot Tip:

Have an old blanket to lay seats on once removed

Performance Gain:

Access to seat switches and components beneath seats

Complementary Modification:

Clean carpet and interior beneath seats

You may have to remove the seats from your BMW Z4 to replace them or service components beneath them; for example the seat belt buckle or front seat switches. In this tech article, I will show you how to remove the front seats from your BMW Z4 Roadster. Once removed, you can repair items like the seat belt buckle or seat switches.

Front seat belt buckles in all BMW Z4 models are equipped with pyrotechnic automatic pretensioners. The pyrotechnic device has an explosive charge which is triggered by the airbag (MRS) control module in case of sudden deceleration such as a car crash. Once triggered the device cinches up the seat belt by 55 mm (about 2 inches).

The pyrotechnic pretensioner in the seat belt buckle mechanism poses a hazard if not handled carefully. The front seat belt buckles are bolted to the inside of each front seat. If you aim to remove either front seat, disconnect the negative battery terminal and insulate the end to prevent accidental reconnection.

Interior trim pieces in BMW Z4 cars are often made of preformed hard plastic. Plastic clips or metal screws may be used to hold them in place. To avoid marring the trim, work with a plastic prying tool or wrap a screwdriver tip with masking tape before prying out trim panels, switches or electrical accessories.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Do not work on your vehicle if you feel the task is beyond your ability.

Vehicle models change and evolve as they grow older, so the vehicle shown in our illustrations may vary slightly from yours. If something seems different, let us know and share your info to help other users. Questions or want to add to the article? Leave a comment below. When leaving a comment, please include your vehicle information.

You may have to remove the seats (red arrow) from your BMW Z4 to replace them or service components beneath them, for example the seat belt buckle or front seat switches (blue arrows).
Figure 1

You may have to remove the seats (red arrow) from your BMW Z4 to replace them or service components beneath them, for example the seat belt buckle or front seat switches (blue arrows). In this tech article, I will show you how to remove the front seats from your BMW Z4 Roadster. Once removed, you can repair items like the seat belt buckle or seat switches.

Start by moving your seat as far forward and up as it will go.
Figure 2

Start by moving your seat as far forward and up as it will go. Working at the seat belt guide near the headrest, push the guide toward the rear of the vehicle to unclip it (red arrow). Then remove the seat belt from the guide and place it aside.

Follow the seat belt down to the outer seat rail.
Figure 3

Follow the seat belt down to the outer seat rail. Then, remove the 16mm fastener (red arrow). Use an open end wrench. It is tough to get a socket to fit in the space.

Then, remove the two 16mm mounting fasteners at the seat rails (red arrows).
Figure 4

Then, remove the two 16mm mounting fasteners at the seat rails (red arrows). Once you remove the rear seat rail fasteners, move the seat as far back as it will go.

Remove the two plastic caps (red arrows) to expose the seat rail nuts (blue arrow).
Figure 5

Remove the two plastic caps (red arrows) to expose the seat rail nuts (blue arrow). Then, remove two 16mm mounting fasteners (red arrows) at the seat rails.

Once the seat belt and fasteners are removed from your seat, tilt the seat backward.
Figure 6

Once the seat belt and fasteners are removed from your seat, tilt the seat backward. Disconnect the electrical connector (red arrow) by sliding the release tab (blue arrow) with a flathead screwdriver and separating connector.

Now you can remove the seat from the vehicle.
Figure 7

Now you can remove the seat from the vehicle. Cover the door entrance strip with a floor mat or old blanket (red arrow) to protect it from damage. Then remove the seat from the vehicle. To install reverse the removal steps.

Once removed, you have access to the seat motors (red arrows).
Figure 8

Once removed, you have access to the seat motors (red arrows). You can removed the mounting screws to replace one.

If you need to manually activate a motor, detach the electrical connector, then connect fused power and ground to the larger wires (red arrow) that drive the motors.
Figure 9

If you need to manually activate a motor, detach the electrical connector, then connect fused power and ground to the larger wires (red arrow) that drive the motors. Use a wiring diagram for your vehicle to be sure you are on the right wires.

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Page last updated: Sat 2/25/2017 03:03:39 AM