There are some major differences between the Z3 and E85 Z4, there are also some subtle differences between the Z4M and non-M as well. We will be following this rebuild up with an identical process on Lee's 3.0si coupe so you should get to see all the differences. Worst Years of BMW Z4: 2003 BMW Z4 – First Generation. 2005 BMW Z4 – First Generation. 2007 BMW Z4 – First Generation. 2011 BMW Z4 – Second Generation. 2020 BMW Z4 – Third Generation. A widely reported BMW Z4 issue is a sliding steering wheel. The vehicle has jerked to one side in the past, making it difficult to control. This part is listed by BMW as BMW part number 54318236846 (54 31 8 236 846) and is described as Genuine BMW Microswitch - 54318236846 - E46,E85,F12,E46 M3,E85 Z4M. For full BMW fitment information or for assistance from one of our BMW experts, we recommend calling us at 877-639-9648. Buy BMW part Genuine BMW Microswitch - 54318236846 - E46,E85 This particular top problem only affects E85 chassis vehicles - the "hard top Z4" is the E89 and is a completely different vehicle. Quick Navigation 2002 - 2008 Z4 (E85, E86) Go Top Site Areas by cusword » Tue Jan 12, 2016 6:49 pm. I had this problem on an 05 3 litre auto. Fault codes reported a fault with the switch on the side of the gearbox that logs the position of the selector lever. You don't have to have the fault light showing to read fault codes. A new switch and no problems for six months. . It replaced the Z3 and an E89 version came out in 2009 followed by the G29 in 2018. The Z4 is a good car tuning project to execute. The key to Z4 tuning is balancing power and reliability you can waste loads of money if you do it wrong. Turning our attention to the engine we need to get a bit more power out of the top end. A few years ago, I owned a Z4M Coupe. It was one of the most flawed cars I had ever driven. Beautiful, fast, but tough to drive round town and difficult to l Cost to Drive Cost to drive estimates for the 2004 BMW Z4 2.5i 2dr Roadster (2.5L 6cyl 5M) and comparison vehicles are based on 15,000 miles per year (with a mix of 55% city and 45% highway FWIW my BMW Independent doesn't recommend less than 6 cylinders in a BMW! So if you are looking at an E85 between 2003 and 2005 the sixes all use the M54 engine in different sizes - 2.2i, 2.5i and 3.0i which seems to be well regarded for reliability. The correct diagnosis for your BMW Z3 or Z4 fault is paramount and can save customers time and money on unproductive and ineffective repairs. We carry many parts in stock and aim where possible to diagnose and repair the very same day. In 2003 BMW replaced the BMW Z3 convertible with the rather stylish BMW Z4 E85 soft top folding cabriolet.

bmw z4 e85 common problems