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Old 12-20-2012, 08:22 PM
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SD ///M4 SD ///M4 is offline
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Location: San Diego, CA
Join Date: Jan 2011
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Mein Auto: 2016 M4 Coupe | 2006 Z4MR
Originally Posted by CALWATERBOY View Post
My convertible hard top will be operating smoothly when the Egyptian Pyramids have crumbled to dust!

A tribute to German engineering.
Failure of the hydraulic pump on E85 (rag top) Z4s (2002-2008) is a known problem and the Z4 forums have many accounts of hydraulic pump failure. Many owners have the pump rebuilt because it is too expensive to replace (the entire convertible top has to be removed first). Just a guess, but I'll bet that your hardtop E93 uses a similar system, as do probably all other BMW 'verts made in the last 10 years, possibly longer. On top of that, your hard top weighs a lot more than a fabric top, requiring even more hydraulic pressure to operate. If I recall, there have been several reports here on Bimmerfest that the various cords that BMW uses can fray and require replacement.

In other words, don't count on it!

My 2000 S2000 used electric motors (and no cords) and never failed in the 13 years that I owned it. I've never heard of a S2000 top failing, although the fabric needed to be replaced after 10 years.

To the OP: As others have mentioned, if you perform regular suggested maintenance, you will probably get tired of the car before it reaches the end of its useful life.

People have suggested Googling Mike Miller's Old Time Maintenance Schedule, but here is what Mike puts at the top of each version:
Please do not post on the Internet. Two reasons:
1) This document is copyrighted.
2) It gets updated periodically.
In other words, you need to find his e-mail address (hint: he writes for the Roundel and for Bimmer Magazine) and e-mail him directly to get his latest version.
- Tom
His: 2016 M4 Coupe | Sakhir Orange Metallic | Black Full Merino Leather | CF Trim | M DCT | Adaptive M Suspension | 19" Black Alloy Wheels | ZEC | ZLP | ZDB | MPE | ED 5/13/16
Hers: 2011 335is Couipe | Le Mans Blue Metallic | Black Dakota Leather | Dark Glacier Aluminum | 6MT | ED 5/12/11
Also His: 2006 Z4 Roadster (E85) | Interlagos Blue Metallic | Black Extended Nappa Leather | Carbon Leather Trim | Purchased 7/19/12

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