How do you lower top of 1988 bmw - 1997 BMW 328

Based on wikipedia...yes. From 1988-1993. I copied and pasted the information below:

M30B35

• 3.4 liter (3430 cc) SOHC inline-6 cylinder
• 9.0:1 compression ratio
• 208 bhp / 211 PS @ 5700 rpm
• 225 ft·lbf (305 N·m) torque @ 4000 rpm
• 87 AKI / 91 RON octane fuel or better recommended

Applications:

• 1988-1989 E24 635CSi
• 1988-1993 E34 535i
• 1988-1992 E32 735i

3.5 L M90 (3453 cc) Applications:

• 1978-1983 E24 635CSi
• 1980-1981 E12 M535i

1988 ?? follow the top hose back to engine and should be on teh housing that the top hose fits too

It will depend on the radio MAKE and MODEL
Try asking here

www.ukbookshelf.co.uk

as they offer free advice+code for these older BMW radios

DID the top just stop? Have you lowered it before? If you have lowered it before then I am sure you are doing it correctly (parking brake set) Go to a place that is familiar with repair convertible tops. Like the dealer or a bmw specialist. they should charge a couple hours or less to tell you what is wrong. You can try a couple of things yourself but even for an experienced mechanic it is difficult. If they have a bmw code reader and not a generic one, it may tell you what sensor or motor is at fault. Sometimes the switch itself goes bad. Try pushing farther down on the switch or apply pressure at an angle on the switch. That will only work if there is a bad contact on the switch, and if it works you have a bad switch, but I doubt it. Go into your manual or online and it will give you information on how to lower your top manually. When you lower your top manually you disengage the motor (which is in the trunk). Then you could try to engage the motor and see if it will lift up and close. Sometimes this will re-time the top and that is all that is needed. Otherwise get it to the dealer. If your mechanic wants 1000 he does not want to fix it or does not know how. The motor may cost a 1000, but usually it would make noises or poop before going out and most repairs are sensor related. Hope that helps

On this website you find fuse box diagram and description for BMW 3 series (1987 - 1991)

https://www.autogenius.info/bmw-3-series-e30-325i-convertible-325is-325ix-fuse-box-diagram-us-version-1987-1991

could be a COUPLE THINGS fuse or speedometer cable

hi bunkeyh, try helping the top when it stops by continuing the movement in the open direction. if it continues operation you probably have bad convertible top straps. another tell-tell sign is if the rear section slams down on the cover or does not hold position. you should be able to reach your hands under the canvas and between the liner at the second bar of the top frame from the windshield to check for sagging or weak straps. in anycase the straps will need to be replaced.

remove steering wheel (17mm hex nut)
remove screws from dash cluster(3 on bottom. 2 on top)
Unplug connections to cluster
Tilt towards you and pull up, and that it!
Trust me , you want to take the steering wheel off , makes the job much easier!

Hey there, I have a BMW 750il just like yours, the best way is to go from the bottom, you will have more elbow room to work with.

on center of dash near storage tray there r 3 buttons. above your ash tray.