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Discussion Starter · #1 ·
hi there has anyone has any problems with changing their battery on a peugeot 307? i tried to change mine and now the car will not start and the car will not lock with the fob aswell!! any help will be greatly appreciated thanx in advance

Premium Member
3,255 Posts
I have not had a problem as serious as this, but I have heard of it.
I did disconnect my battery, and then found that the car would not start. After a little time I went iside (fortunately I was at home) and got the spare key. It then started. Having started it the original key worked fine.
Did the same thing a secont time when working on the car, same happened, except that I got the spare key immediately, and it didn't work either. Went inside to sulk.
Came out about 5 mins later, and lo, it all worked again, on both keys.

For future reference, and this could be put in a sticky, follow this sequence. It is all to do with upsetting the BSI.

Before touching battery, unlock vehicle, and lower driver window. Then wait a few minutes to allow the BSI to go to sleep.
Then do whatever you wanted to do with the battery.
Having reconnected the (new) battery, wait 5 minutes.
Then lean in open driver window and switch on lights. This should wake up the BSI. Then everything should work fine.
If you do things in too much of a hurry, you can have problems.

Must be badly written software.

In your case, follow the steps above again from the start. A second go might bring it all back.
Good luck.
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