N62 170A vs. 180A Alternator?
Hi guys,
Anyone know the difference between 170 & 180 amp Valeo N62 alternator? Are they interchangeable? Realoem says, "Please determine the installed alternator independently or via diagnosis". https://www.realoem.com/bmw/enUS/sho...44#12317540994 Thanks |
I'm not sure. I currently have the 170A in the truck... but when it goes I have a 180A sitting on the shelf. I've upgraded alternators in the past on vehicles but those were a chassis or two older.
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Lots of people go for the 180 when replacing. I never heard of any issues with people “upgrading”.
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Might be with the options the car came equipped with from factory. If you have more electronics like 2 axle air suspension and etc it might come with 180 vs 170, just my assumption.
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Just did some more investigating on realoem. E70 N62 also has 220 & 230 amp... wonder if they'd work...
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^That's a good question. Sizeable bump in output vs the E53.
Edit: don't think it will work. I think the e70 alternator is without voltage regulator and relies on the IBS to determine charge voltage. |
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I'm pretty sure the E70 alternator has the VR on the back, the same as the E53 - it's rated output voltage is 14v indicating there's a VR on board... |
The e70 (dme maybe) uses the ibs to adjust charging voltage to compensate for battery age/degradation. This is why you have to register a new battery.
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Also, it seems that not all alternators for the E70 range have a higher output rating than the E53 alternators - many variants are also rated at 170A/180A. I guess it's engine specific. :dunno: I haven't looked but are the mount points/electrical connectors/pulleys etc. the same? If the engine variant is the same family (i.e. 2005 E53 3.0d M57TU vs 2006 E70 3.0d M57TU2) then mount points/electrical connectors/pulleys might be the same but it seems like just another variable to take into account for not much gain. Remember, you only need the power output your car can use - providing more power capacity doesn't mean the car can/will use it - unless you have added accessories that have a high power load. |
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