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Hello Everyone! Wow a whole different world today when compared to a couple of months ago. Hope everyone is staying healthy. I have a leak at the joint of the upper plastic coolant line (11531705210) and the heater hose (64218377673). Both are new after a complete cooling system update and...

Hello Everyone and Happy Holidays!! I have a couple of quick questions about my 1999 Z3 2.3. On the passenger side seat belt, there is a little button to keep the buckle from sliding down too far. There is not one on the driver's side seatbelt. Can I put one in? Is there some reason the...

Hello! I am bypassing the HK amplifier in my 99 Z3 2.3. I have been successful and am now using my new head unit to power the stock speakers which are all being replaced. The amp has 3 plugs - one of them is a 6 pin socket. Below are images of the amp and then a closer look at the 6 pin socket...

Hello! Having just finished a total cooling system overhaul and manifold upgrade, I realize I had neglected to address a small issue. The new expansion tank has a blue, 2 pin electric socket on the bottom. However, I cannot locate the associated plug for it anywhere in the engine bay. I am...

Continued from Part 1 (Vacuum and Electrical M54B25 on M52TU - Part 1)... Connection #10 Hard plastic pipe from center bottom of manifold to port on VANOS: Connection #11 Large vacuum hose from power brake unit to valve just right of throttle cable/body Connection #12 Pressure regulating...

Hello! I am finally ready to install the new intake manifold on my recently acquired 120K mile 1999 Z3 2.3 after a cooling system overhaul. Since the manifold needed to be removed in order to replace the plastic cooling pipes, I opted to upgrade to the M54B25 intake manifold for better...

Hello! As I write this I have spent the better part of the afternoon putting back together the front of my M52TU motor, meaning pulleys, tensioners, idlers and belts. I thought I had put it all together properly but the belt appears too long to run as the diagrams and photos show. It is the same...

Hello Everyone! While overhauling the cooling system on my recently acquired 1999 Z3 M52TU w/120K miles, I broke the lower plastic cooling pipe that runs under the intake manifold. Even the gentlest pulling and rotating resulted in the end of the pipe stuck in the block with no way to grab it...

Hello Everyone! Given realoem's lack of a proper diagram for the Z3 M52TU cooling system, as well as my considerable ongoing confusion finding the right parts for my Z3 cooling system overhaul, I grabbed my Crayons, some realoem printouts and some ebay listings and created the diagram below. It...

My new to me 1999 Z3 2.3, M52TU has 120K miles on it and is in need of a complete cooling system overhaul. The process has been quite smooth - a California car is so much easier to work on than one exposed to harsher climates. I have so far removed radiator, shroud, belt tensioners, water pump...

Hello! I have been wrestling with this issue here and on a couple of other forums. I have a 1999 BMW Z3 2.3 with the M52TUB25 motor. The car has 120K miles on it and is a recent purchase. I am preparing to overhaul the cooling system and trying to get as many parts as possible before diving in...

I was replacing fog light bulbs and I noticed that molded into the plastic headlamp covers are the proper bulb types. HB4 for the low beam and HB3 for the high beam. Clever! Look in the lower right and left hand corners of the images below...

Hello All! I have a 1999 Z3 M52TUB25 with a 5 sp manual. Among many other less important things, I need a new illumination ring for the cigarette lighter, #10 in the first diagram below and the part number 51168222181 superseded by 51162493684 (01/02/1997 — 03/15/2019), Exchangeable...

Hello, does anyone know where I might find the"badge" labeled AIRBAG that is on the back portion of the interior door card? I have one on the passenger door just behind the armrest but not one on the driver's side, just a hole where it would go. Looked endlessly on realoem with no luck. I am not...

Found this American quarter in the rise/lower mechanism of the power seat. Probably a good idea to periodically check under the seats, power or manual, for inappropriate objects...

Hello All! I purchased a 1999 BMW Z3 a few months ago and after reading through this and other forums I concluded that retrofitting a cruise control should not be a difficult job. In particular, I found this article well done and extremely helpful...