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I haven't heard of this being a "known thing" (others chime in). It sounds like a random failure. Perhaps you can do an OBD scan to see if any error codes regarding this failure have been captured?

Take a look at this thread: https://www.mybmwi3.com/threads/forward-cooling-fan-replacement.18408/

I would add couple of things. 1. Already noted crappy quality cable insulation which would amplify the other possibilities on this list 2. Insufficiently specified cables for the design. 3. Temperature due to environment or high current in cables. 4. Partial discharge damage of the insulation...

I've noticed my speedometer has always read about 2 mph fast since I've owned my vehicle purchased in 2014. Most of the time I can make the correction in my head :unsure:

I endured this phenomenon for over 5 years commuting East in the morning and West in the evening. ACC was unusable during certain times of the year. Also I quickly found out that it apparently had a hard time seeing white box trucks in front of me.

I recently paid ~$950 total at Costco for my 4 new Ecopia EP600 OEM tires. The prices have certainly gone up since last time I bought these.

Yes, I found out the hard way even though I had "official" instructions which did not help very much. It appears the European version only has a rod instead of that bar, which probably did not pass US standards, but may be much easier to remove. In any case, yes I ended up having to remove...

Does anyone imagine that a class action suit regarding the 60Ah battery issues would have any merit? Any lawyers out there to chime in? Asking for a friend. :)

I was trying to and may still try to put a PWM signal into the control line of the original fan, although I'm speculating that it might be a single wire communication bus. There is no ground connection that I know of near the fan connector, but I was able to trace the cable back to a connector...

$30k? How'd you get such a deal? My quote was for over $40k. :ROFLMAO:

I saw that article and thought WTF with all the trouble I'm having with this. Thanks for following through with the author and I'd appreciate anything you find out. I'm wondering if there was something else wrong with his car indicated by the CEL satisfying BMW's fault requirement. Maybe...

When I was a kid, a friend and I were filling our bike tires at a gas station. Remember the free in ground high pressure air lines near the pumps? Anyway, as I was filling my tires and being careful of the pressure, I heard a loud noise and saw that one of my friend's tires had exploded. He...

Quick update- I found a used fan from a 2017 i3 and through much effort and improvisation, managed to change it. I was able to see it run before installing but having it plugged in and also after fully installing it. I thought it was fixed but a short time after replacement and seeing the CEL...

Quick update- I contacted BMW customer relations, the lady quoted me the warranty, I asked if there was anything they could do. She said they would get back to me within a week. They waited the obligatory 3 days, got back to me with a confident "no". I still have until July before the 10 years...

I purchased the car in California and brought it in to the same dealer for the battery check. Is this the same warranty you have? (attached)

You'd better be cautious on this and not get your hopes up. I have a 2014 Rex, within the 10 years of what I thought was the battery capacity warranty. I took it into the dealer near me, also in northern California, they did the battery test on my car which turned out to be 56% (kappa avg 12.4...

My 2014 i3 Rex with 80k miles 10 year anniversary is coming up in July. It is registered in California. My range has been pretty bad (40-50 miles) for a long time and my average kappa based on about 24 readings since Dec. 2021 is 12.4kWh or 65.7% of 18.8kWh, so I decided to bring it in for the...

I've been having problems with the cooling fan on my 2014 Rex, apparently the fan has failed resulting in the CEL. I brought my car into the dealer to actually run the HV battery test as my 10 year battery warranty is up in a few months. They attempted to run the battery test but said it was...

I went through this issue almost 9 years ago with BMW, back and forth, for my 2014. I gave up trying to get this to work the way I wanted it to, and installed a electric water heater timer to power up my EVSE (which didn't have a timer) when the rates dropped. The car was set to immediate...

I'm hoping this is a reasonable topic to bring this up on since my full charge is much less than 64 miles. I've been sporadically tracking kappa on my 2014 i3 Rex (with ~76000 miles) since December 2021, as I'm considering the optimal time to bring my car in for a battery check. In California...