I am about to install the third alternator in my X5 3.0 in 5 years. The first two were Bosch and both lasted about two years. Fortunately for FCP Euro, The last two were replaced free (except for labor of course!) Now, they’re sending me a Valejo, today, which is supposed to be OEM, at no additional charge, With free replacement Under their lifetime warranty.

However, In the last two days, I got a Stanley battery charger at Walmart which showed something very interesting. I have been having misfire problems for six months and weak power. Three different mechanics couldn’t diagnose it.

In order to get around during the last 2 days, I charged up my one year old Diehard Gold battery to 100% and- to my surprise, my performance and power issues disappeared. That is, until the battery voltage went down again below 10 volts On some local trips. By The way, 100% recharging took at least 24 to 36 hours.

I’m looking forward to getting the new Alternator and hoping that my power problems are gone. I never suspected that it might be an alternator problem, But if the spark plugs are not getting enough power, I can understand it.

The Stanley charger also diagnosed the alternator is being bad. My little Ebay digital voltage meter in my cigar lighter also allowed me to tell when I was about to run out. I hope this helps someone...

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1999 740IL - brand spanking new on lease til 04
2004 X5 3.0 - not so new any more!