In todays episode we are removing and replacing a bad alternator in a 2012 Lexus IS 250. The battery won’t keep a charge even though it is brand new, which is usually a indicator that the alternator is bad. Overall replacing the alternator is pretty easy and only need a few tools. Hope this video is helpful!
*I realized upon re-watching this that I somehow did not include the clip where I torque the bolts down. The torque specs are 32ft-lbs for the bolts holding the alternator in.
~~ Here is a few good alternator options if you don’t want to get one locally ~~
Denso Alternator on Amazon – https://amzn.to/3FnTqvp
Cheaper Alternator on Amazon – https://amzn.to/3DrLw3x
Good option on Ebay – https://ebay.us/CeN9Y6
eManual Repair Manuals for Any Vehicle – https://bit.ly/3LPyn7D
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Denso Alternator on Amazon – https://amzn.to/3FnTqvp
Cheaper Alternator on Amazon – https://amzn.to/3DrLw3x
Good option on Ebay – https://ebay.us/CeN9Y6
eManual Repair Manuals for Any Vehicle – https://bit.ly/3LPyn7D
Like and subscribe for new weekly videos!
Thanks for watching!
Does this also work for a 2008 ?
Did you use an e-torx to get those studs out? (one from the engine and the alt?)
Thanks!
Great video! Question: I checked with a multimeter. Car off reading: 14-something. With car running: 17-something. Do these high readings also mean a bad alternator?
Great explainations on everything. Having never changed one of these before, watching this gave me the confidence to do it myself.. took me twice as long, and I bled a little, and had to phone a friend.. but it saved me 2 days and $800!
erm…soo less than half an inch or so behind the rear bracket bolt there appears to be a brass 10mm drain bolt of some sort. in my haste – coupled with poor lighting conditions – I loosened it thinking it was the bracket bolt only to hear fluids running. looked under the car and saw red fluid coming out – is this transmission fluid? seems a little too forward of the tranny mating surface, but then again I am not sure if/how the tranny fluid circulates within the engine body.
I just followed this and replaced the alternator. But when I put the battery back on and started the car it struggled and wouldn’t turn over all the way. So now my car won’t start. Any ideas what it can be? I tried jump starting and that doesn’t work either so don’t think it’s the battery. Please help
Awesome video. Followed your instructions and completed the job in just under 2 hours.
I just wanted to share my appreciation for the great video you posted. I followed it and was able to successfully change the alternator of a 2008 is250. Thank you for all of the details and for showing the video in card to see places.
Good video, but one thing I would like to point out. I learned the Hard way, you need to leave the bracket in the back of the alternator little bit loose so you can put all the bolts in and tight it up.
My bracket bolt is stripped. Cant even see it let alone get it out. I feel so hopeless lol
This is literally what the internet is for
Perfect video
I would have been stuck figuring out that bracket for hours
Thank you thank you thank you
I got a problem with my 2007 lexus is250
I didnt hear it star
Is the 2015 is250 the same alternator
Great video! Thank you
Just did the swap last night, thanks for the help. But this morning my check engine light and Traction light came on. Any Ideas if that is related? I had no issues before the alternator died.
Best video on YT on how to replace the alternator! I just finished this job last night after stripping the top long bolt on the front of the alternator (SMH) and taking off the wrong nut under the manifold. But, After resolving these hiccups the removal and install were pretty smooth. I did find that using my left hand (kind of reaching backwards) to find the bracket nut under the manifold made it easier to place my extension. Thanks again for a great tutorial.
Thank you sir. Life saver wouldn't have found the bolt by the manifold without your help.
Mine just recently went out and was wondering how much do you think a mechanic would charge to replace mine?
Just did this step by step, but my car doesn't turn on. Any idea on what I could be? There's power going through the battery but doesn't crank on
Very helpful thanks
Took me about 1.5hrs for this DIY job. A good amount spent on figuring out how to get to that damn bracket nut. There's barely any room to get your hand in there let alone trying to turn your ratchet after you do. I would recommend anyone to have a deep socket 12mm for that bracket nut because the stud sticks out too much for a regular socket.
Awesomeness, Great video 😉
Thanks! My gf's alternator on her 2007 IS250 went out last night. Watching this first will save me a lot of time!
Good demonstration I did replace alternator two years ago on Lexus IS250 2007 model but charging light keeps showing. Car was tested and it is charging. How do I take battery light off?
Thanks for the video very detailing starting on mine in 10 minutes