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07-14-2015, 09:32 AM | #1 |
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More N63 bad news? So solution to battery charge flaw
So the BMW engineering solution to the battery charge design flaw -- it only charges during braking, by design, and not at other times which represent 99% of the use case of US drivers and they did this to get better gas mileage numbers -- is to replace the battery when they change the oil.
Do we have an option of getting worse gas mileage (the reason this design was implemented) to hold on to the battery? I am going off warranty end of year and a new battery at every oil change adds some $600 to the costs if I adopt that solution. I'm already dusting off the trickle charger I used to use for the always out Wrangler. Last edited by The Beast (750Li); 07-18-2015 at 05:17 PM.. |
07-16-2015, 07:16 AM | #3 |
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I've owned a fair number high end Mercs -- coupes, sedans, SUVs. It was how Mercedes US handled the chronic body rust problem on the mid-00 MLs that drove me to explore owning alternatives, like BMWs. I *never* saw a fumble at this scale.
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07-16-2015, 09:32 AM | #4 | |
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I replied " If you cannot repair my old car, how do I know you can repair a new car." After 1 month, they gave me a $2800 invoice all because of power seat problem and cause the battery dead. I pay my invoice and drove to a BMW dealer and buy a brand new 740iL. |
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07-17-2015, 05:47 PM | #5 | |
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The benchmark for most batteries in the northeast is 24 months. So, if you can eek 24 or more months out of your battery then you're doing pretty well. Every BMW I have had except one was able to extract 36 months on the battery. Also, the battery does not charge during coasting (unless the battery preservation logic kicks in). The battery primarily charges during braking and engine braking. |
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