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Do anyone know the actual part number for the Denso alternator for the 2is? I do not want any aftermarket parts number, seeing how this is the low point in these cars. So I wanna go oem on this part
This was from my 2007 IS250 RWD. Went out at 100104 miles. I got a replacement DENSO from NAPA for around $250 and was an exact fit. It has been working great for the last two months. Old one was a pain to get out. Unless you have done this before, I suggest looking up some U-tube videos or forum write-ups before you attempt do it. it will save you a lot of time and frustration. I have seen one thread where someone actually pulled the ECU boards on driver side fender to do this. I cringed when I saw that. I did not have to do that or even open the cover or loosen the ECU box to do this. It is not going to buy you much working room, but can end up creating additional headaches. There is a hidden bolt that you need to get access to from over the driver side wheel well. Be sure to have a magnetic pick-up tool or put some painters tape around inside of the the socket so the Nut will just stay snug inside the socket when you take it out. You need a 12mm socket for it. I didn't use tape and I dropped mine and never found it. Lexus didn't have it in stock, but a local Toyota dealer had it. I paid like $4 for two of them just in case if I drop another one trying to put it back. I did use painters tape when putting it back in, and hand started it to get as many threads on the bolt before using the drive. This bolt was the most difficult part of the whole job because you are working blind with very limited access. I even entertained the Idea of not putting this nut back on, but decided against it. See the picture below for the location of this bolt. I did not take that picture however, and found it in this IS forum when I was researching on how to do it. (I can't find the link otherwise I would have given credit to the person that posted it). For some reason, the picture gets rotated when I upload it. Rotate it 90 degrees counter-clock-wise for the correct orientation.
It is the 12mm bolt circled in green that you have to take out. You also have to re-use that bracket and install it on the replacement alternator.
You do not have to get under the car except for looking for dropped bolts and tools. I suggest throwing down a towel under the work area from inside the engine bay, so dropped bolts, washers and nuts won't disappear out of sight. Had I done that, I would have at least saved an hour or so that was spent looking for stuff, and a another by not having to go to the Toyota dealership for a bolt. You would also have to unbolt around 5 or 6 bolts that is holding the wire harness around the intake manifold. This is so you can move it out of the way slightly to get some access when getting the alternator out. Be sure to disconnect all of the connectors so you don't damage any of the sensor wiring that is attached to this harness. Is this the original Alternator? Mine was and it was in there really tight after removing the two main bolts and the hidden nut, there was no motion. Had to muscle it out of there after several taps from a rubber mallet. It was a challenge to get it out with the cooling fan and the top radiator hose still in place,. But with lots of patience and some choice words, I managed to get it out. New one slipped in to place in under 5 minutes without connecting bolts and the wires. If I were to do it again and was doing this at my house, I would siphon some of the coolant out of the radiator and removed the top radiator hose, which will give you lot more room and access to the area. I would probably remove the cooling fan as well. That will make the job a whole lot easier and give you ton of room. Trade off is, you got to remove more stuff . You can take the Alternator out without removing the cooling fan unit. I had to do this on the parking lot at my work, so I didn't remove the fan or the radiator hose. Be sure to disconnect the Negative terminal of the battery as you will be fiddling with wire harness and the alternator wiring. If you accidentally touch the alternator power wire to ground, you could end up blowing a Fusible link causing you to spend lot more $$$'s and a lot more work to get it replaced.
Good luck and feel free to share tips/short-cuts you may have for next time around.
Jeff,
Your part numbers seems to be slightly different than my original DENSO. Wonder what the difference is. Is your car an "All-Wheel-Drive" or a "Front-Wheel-Drive" car?
Your part numbers seems to be slightly different than my original DENSO. Wonder what the difference is. Is your car an "All-Wheel-Drive" or a "Front-Wheel-Drive" car?
thx.
There are no FWD IS models. They're either AWD or RWD, however the alternators are the same either way. I've never replaced the alternator in my car.
27060-31060 is the original alternator for 2006 and 2007 IS models produced up to June, 2007, and was replaced by 27060-31061 from June, 2007 to 2009 models produced up to October 2008. IS models produced from November 2008 onward used 27060-31062, which replaces all earlier part numbers and is the only one that can be ordered from Lexus at this time.
Dealer quoted me $800 + to replace the alternator. I just had them replaced the car's original water pump about a month ago at around 98K miles at a cost of little over $800. I just had them do it since I didn't have time. Had I done it myself, I could have saved over $500. So, I wasn't going to shell out another $800. So I bought the NAPA DENSO and installed it. I did not bother to check the price for a Alternator from Lexus figuring it would be twice as much. I just realized today it is only $40 more than NAPA's DENSO. However, NAPA's DENSO seem to have a cover over the pulley where as the factory one does not. But the pulley cover from the original looked different than the one on NAPA's DENSO. So far it has been working great. Now on to carbon cleaning and replacing rear axles (torn boots).
Dealer quoted me $800 + to replace the alternator. I just had them replaced the car's original water pump about a month ago at around 98K miles at a cost of little over $800. I just had them do it since I didn't have time. Had I done it myself, I could have saved over $500. So, I wasn't going to shell out another $800. So I bought the NAPA DENSO and installed it. I did not bother to check the price for a Alternator from Lexus figuring it would be twice as much. I just realized today it is only $40 more than NAPA's DENSO. However, NAPA's DENSO seem to have a cover over the pulley where as the factory one does not. But the pulley cover from the original looked different than the one on NAPA's DENSO. So far it has been working great. Now on to carbon cleaning and replacing rear axles (torn boots).
I bet they all get it from the same rebuilder. The cap and no cap is probably just a stock photo of a generic Alternator.
Looks like the Denso remans go from $160-$230 depending on where you buy.
Denso is a Toyota group company. They built the alternator originally and they are the ones who remanufacture them for Toyota/Lexus, so you're going to get a high quality unit either way buying it from Lexus or from Denso.
With regard to the pulley cap, there should always be one on the alternator, however there is a difference in how the part is supplied.
If you buy the alternator from Lexus it does not come with the cap, which needs to be reused from the original alternator or purchased separately (part number 27416-0W050). It looks like the aftermarket Denso remanufactured alternator includes the cap.
Should note that the Denso reman's come with the cap. As with all the other alternators, you still need to transfer over that bracket that bolts up to that PITA spot that everybody hates doing behind it, and that little bolt that holds the harness clip.
With regard to the pulley cap, there should always be one on the alternator, however there is a difference in how the part is supplied.
If you buy the alternator from Lexus it does not come with the cap, which needs to be reused from the original alternator or purchased separately (part number 27416-0W050). It looks like the aftermarket DENSO re manufactured alternator includes the cap.
Jeff
I couldn't figure out how to get the cap off of my original alternator. I pulled on it, tried to unscrew it, nothing was happening. I didn't want to damage it by trying to pry it out with a tool. Otherwise, I would have loved to have kept it. It was a bit larger and nicer looking than the cap that came with NAPA's rebuilt DENSO. I almost didn't return the original for the $85 core charge thinking I will rebuild it myself one day. But I have tons of "one day" projects that I haven't been able to get around to. So I returned it. Oh well. I guess I still have the original bracket and the bolt.
Will do thanks for all y’all help... the last two alternators I used was bbb brand and they seemed to always fail within a year or year in the half... and I heard that the is250 weak point is with the alternator and should really be replaced the oem. Is bbb a good brand?
Denso alternator part number???
