525D Starting Problem - BMW Forum

chrismc1981 · 08-10-2009, 03:32 AM

Hi have the car a few months and it has been a Joy to drive but on thursday was on my way to training everything fine went to the garage to get a bottle of water and went to start the car and it just wouldn't start!!!

Phoned the AA they came out asked what the problem was and I told them it wouodn't start and he turned the key and I fired first time, friends a mechanic and he told me when I bought the car I should replace the fuel pump in the tank because they always give problems!!!

AA guy said that the cars computer hasn't registered a fault so drive on till it happens again..
Happened on saturday again so I went to BMW and got a new fuel pump
BMW said its usually the cam shaft sensor that causes this problem and might also need replaced they told me they had 3 in that week with the same problem as mine...

So any Ideas??? already spent £150 and I would rather soend the money where the fault is!!

Is this a common problem? also only noticed today in manual the car limits and 4 and a half thousands revs never done that before!!!

any help wanted

marti5 · 08-10-2009, 08:34 AM

It may well be your HP pump, hard to sy for certain.

chrismc1981 · 08-10-2009, 08:56 AM

Is that the one that is under the car at the passanger side?
I have the new cam shaft sensor today and dont know to fit it or not BMW said this is what the problem usually is?

brucie · 08-10-2009, 06:38 PM

chris if it limits at that its normally gone into what they call safe mode, another words it wont let the engine rev full as there is a fault somewhere,
is the engine check light not on, seems strange that the car would do this without a fault showing up,
and as for finding the right fault mate, get your mechanic friend if he can to put your car on the computer, if you go changing all the different sensors that are mentioned to you , you will be out an absolute fortune, believe me been there and done it.

chrismc1981 · 08-11-2009, 01:57 AM

Hi had the car registered a fault code and its suppose to be the cam shaft sensor, with I had bought yesterday.

So put it in car starts everytime and it revs out again the other sensor a good bit thinner than the new one and Bmw where saying we had another 3 in that needed these replaced!!!