Car Performance Specs

1. Disconnect the negative battery terminal first using a wrench. Engage the parking brake. Slide a drain pan underneath the gas tanks drain plug, before removing the plug and allowing all of the gas to drain out.
2. Remove the bottom seat cushion, then remove the covers on either side of the seat. Raise the rear of your car with a jack, placing a the car onto a pair of support stands. Detach the rear muffler section and driveshaft before attempting to remove the gas tank. To do this you will have to loosen the bolts holding the various components (ie. driveshaft and rear muffler section) into place. Spraying some penetrating oil onto the bolts may make it easier to remove them.
3. Detach all fuel lines connected to the tank using a specialized BMW fuel line removal tool you can find at most auto parts stores. Place another jack beneath the tank as you remove the straps holding the tank in place. The straps are secured with bolts on each end, which you will have to loosen with a socket wrench. Once youve removed all the straps and bolts, the tank will drop onto the jack.
4. Detach all fuel lines, filler hose and fuel pump from the tank while it sits on the jack. Perform any necessary repairs or replace the tank by reversing the previous steps. Finally, lower the car from the support stands and refill the gas tank.

1. Open the door and remove the bottom seat cushion from the car using the 3/8-inch ratchet, extension and sockets. Unbolt the covers located on both sides of the area underneath the seat using the ratchet.
2. Unbolt the fuel level senders on the sides of the tank using the ratchet. Then lift the rear of the car using the jack and set it down onto a pair of jack stands.
3. Unbolt the rear muffler section from the car using the 3/8-inch ratchet, extension and sockets, then lower it out of the way. Unbolt the driveshaft from the rear end of the car using an open-end wrench.
4. Place the jack underneath the gas tank. Unbolt the gas tank from the chassis using the 3/8-inch ratchet, extension and sockets. Slowly lower the jack to drop it down from the chassis. Disconnect the fuel lines and connections from the tank using a flat head screwdriver.