Leaderboard

Hi all, just an update to my previous post. Finally resolved my problem, with no help from BMW…… Had to replace the generator/starter/alternator unit to sort the problem, having 1st replaced the 48v battery to eliminate that from being the problem, which it wasn’t. So just over 3 years old, less than 70k on the clock and the MHEV system started breaking down. As time went on the issue got worse and resulted in numerous unexpected ‘shut downs’ whilst driving and on one occasion a complete electrical failure due to a flat 12v battery which wasn’t being charged. Lesson from that episode was that I constantly charged the battery when not in use to avoid a si,liar situation…. Hearing more and more people with the same problem and BMW parts confirming they are getting numerous enquiries every week for the component, so clearly BMW have a longevity issue with the system. Going to be a lot of unhappy customers. BMW of course denied there was an issue , weren’t willing to resolve the problem and instead said ‘take it to a main dealer have them identify the problem and if clearly a BMW design or manufacturing problem, they might consider a contribution to the cost’. I could see running up a huge bill at main dealer rates and then getting a minor contribution from BMW if I was lucky so opted to get it fixed by my local independent who was excellent with it. Fortunately, the vehicle was fixed and drove like a dream again, I forgot how good it was! But as the title says MHEV owners beware!1

Hi Dave, Thanks for the reply and the welcome. Car has only done 33k miles with full service history - never any issues. The tuner in question will be DMS automotive, I believe they are established and have done various things with Carwow and Top Gear. Slightly on the higher end price wise but believe it would be stupid to cheap out on something like this. I also don't plan on being a boy racer, I just want the extra power for the odd over take and to prevent the delays from the automatic gearbox. Thanks again for the help! Seb

Hi Seb Welcome to the Forum First make sure the engine is in Tip Top condition and well serviced (don't forget Transmission and Diff) if it is then you should have no issues. I would ask how many they have done and see if you can talk to other owners Most problems occur when ECU tuning is carried out on a mechanically sad engine and it then gets heavily used, result an engine failure with the tuning blamed. Most issues are heavy right foot is my experience Dave

Morning James Google the Register of BMW Dismantlers (Quarry Motors have always been useful). For my E53 4.6is I used a local Carpet Fitter he made up a full set for me all edges trimmed and including non slip velcro patches. He used the OEM mats as patterns and off cuts from a Dark Grey High Quality Wilton carpet he had fitted, cost was less than half OEM gave the car a new smell for ages. Dave

Morning Steven Welcome to the Forum If you have the original pump and module I would send it to ECU Testing (Derby/Nottingham area) if it is repairable it won't need coding when it goes back on. Brake bleeding is a straight forward procedure I always start at the nearside rear (furthest from the master cylinder) I use a vacuum pump bleeding kit (mine is old but they are about £20 or so) to pull fluid through. Make sure the Master cylinder is above Min at all times, once clear no bubbles or murky fluid lock it off and move to the offside rear and repeat. Then nearside front and finally offside front make sure you are using the correct brake fluid and as said never let the master cylinder drop below the Min mark. Now the only tricky bit is you will need the help of someone who has a BMW capable Diagnostic tool if you don't have your own to activate the ABS unit, job done. If the original can't be repaired the next point to check is "the unit that is fitted is it the correct one for your car" is/was it New or purchased second hand? check the part number of both the Pump and Controller carefully if they are the same as the OEM part then it should have been plug and play. If the unit was (a) Second hand is it faulty? (b) If it is an incorrect part then you will struggle to get it to work. However if it does need coding then again you will need the help of someone who has a Diagnostic program that is capable of doing it Hope this Helps Dave

Hi Dave, Many thanks for your reply, yes i would always DIY this … I am fully aware of realoem and have indeed been researching a replacement front diff. anything i’m looking at will be factoring in new oil seals to be fitted also, along with the correct spec diff oil.. will keep this post informed of the outcome.. Dave 👍

Well….. the drop top pug is getting kicked out soon… I went on eBay and made a cheeky bid. off to pick up a nice 4.5 v8 Porsche cayenne up on Saturday !! ironically I won it while I was registering my wife on a speed awareness course 🙄 let’s see how many times the X5 is going to have a hissy fit when this one turns up. 😂

Update on this. It was a terminal in the plug. Terminal was not making a good connection with one of the pins on the o2 sensor plug. Extremely annoying but fixed

Ha...I just sold my Porsche (2001 Boxster S) and now have a 420D convertible (with remap). The Boxster was a beautiful car and very energetic but my body is getting old and decrepit and falling out onto the pavement to get out was a pathetic display ! Anyhow, we now have a cockapoo and she has her own back seat now !! Wish I had bought a 435D in hindsight but lets see what a year or so in this girl will decide !!! PS Good luck with your new Porsche !!!