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  #1  
Old 03-14-2010, 02:28 PM
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Join Date: Aug 2007
Location: Columbus, OH
Posts: 685
Default Changing your alternator? READ!!

I am a mechanic who specializes in European cars. One of my customers bought a 2005 XC90 last year, and during routine maintenance several months ago, I noticed a noise coming from the belt area. It turned out to be the bearings in the alternator. Since it wasn't on the verge of immediate failure, the customer elected to wait until the noise started to get worse before having me replace it. Anyhow... the time for replacement came, and I ordered a new alternator from my usual parts supplier. Installation went fine... until I started the car. The charge/ battery light came on about 10 seconds after startup, along with a warning on the information center. I shut off the car and checked the connections... all was fine. I ran charging system tests... everything was working- proper voltage, somewhat low amperage, but that's not unusual for a fresh alternator, as the brushes have to wear- in a little. Seemed fine otherwise. After racking my brain, and those of some Volvo experts, (Including tech!) I decided that there was a problem with the alternator's communication with the ECU. So, I exchanged the unit, which was my supplier's "house" brand, with a Bosch reman alternator. Installed it... exact same problem! Finally, after screwing around with it again, I ended up sending the customer to a Volvo dealership. They used the car for about 3 weeks before finally taking the car in- with absolutely no trouble whatsoever, aside from the warning light/ message. When they finally took the car in, the dealership performed tests, and found that while voltage was correct, amperage was somewhat high. They removed the alternator, and found that the voltage regulator was the wrong type. It was for a 2004 and earlier XC90, and was self- regulating. The 2005 and newer models use a computer- controlled regulator. I called my parts supplier, and found that the alternator they sold me, Bosch P/N "AL0820X," was indeed listed in the paper catalog for almost ALL Volvo 5- cylinder cars from 1999 to 2007. Upon calling several other parts stores, I discovered that all of them listed the same P/N... except FCPgroton. They showed another P/N, "AL0854X." When I tried to get that unit from a local parts store, no one had it even available. Finally, I called Bosch tech support, and the person there said that AL0820X used to be the number they specified for the 05 and newer vehicles, but that they were "running into issues" with it on those cars, so now there's a different P/N (with the correct regulator.) The problem is- this is a totally new application, and NO ONE has it available. FCPgroton has it on back- order, with an expected arrival date in April, but that was revised last Monday, when it was supposed to have been in. I ended up replacing the alternator with one from Volvo, at much higher cost. Now, 2 months and 3 alternator replacements later, the car is working as intended. So... the point of this long- winded post? If you have a need to replace the alternator in a 2005 or newer XC90 2.5T, MAKE ABSOLUTELY SURE to get the right one. Most parts stores' catalogs and computers, as of right now, show the older alternator as being the correct one, but it's not! It will work... kind of... but it will erratically supply too much or too little current, which WILL lead to premature battery failure. Fortunately, it doesn't overcharge voltage- wise, as that could cause damage to other systems. The correct Bosch P/N (if you have the 140A alternator) is AL0854X (or "N" in place of the X if you want a brand- new unit) This is a brand- new application, and the only place I've found, after several hours of searching, that actually lists it is FCPgroton... who at this moment can't actually GET it(!) Hopefully, you won't need a new alternator this early on on a 2005 or newer model, but if you do... I hope this will save you the aggravation that this example of "overconsolidation" on the part of parts suppliers has caused.
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  #2  
Old 03-14-2010, 03:45 PM
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This is a great post and good to know. Thanks for your time and efforts for sharing that with us. I hope that your client realizes how good their mechanic is :-))
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  #3  
Old 04-09-2010, 03:50 AM
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Join Date: Apr 2010
Posts: 1
Talking

Quote:
Originally Posted by Carrots View Post
I am a mechanic who specializes in European cars. One of my customers bought a 2005 XC90 last year, and during routine maintenance several months ago, I noticed a noise coming from the belt area. It turned out to be the bearings in the alternator. Since it wasn't on the verge of immediate failure, the customer elected to wait until the noise started to get worse before having me replace it. Anyhow... the time for replacement came, and I ordered a new alternator from my usual parts supplier. Installation went fine... until I started the car. The charge/ battery light came on about 10 seconds after startup, along with a warning on the information center. I shut off the car and checked the connections... all was fine. I ran charging system tests... everything was working- proper voltage, somewhat low amperage, but that's not unusual for a fresh alternator, as the brushes have to wear- in a little. Seemed fine otherwise. After racking my brain, and those of some Volvo experts, (Including tech!) I decided that there was a problem with the alternator's communication with the ECU. So, I exchanged the unit, which was my supplier's "house" brand, with a Bosch reman alternator. Installed it... exact same problem! Finally, after screwing around with it again, I ended up sending the customer to a Volvo dealership. They used the car for about 3 weeks before finally taking the car in- with absolutely no trouble whatsoever, aside from the warning light/ message. When they finally took the car in, the dealership performed tests, and found that while voltage was correct, amperage was somewhat high. They removed the alternator, and found that the voltage regulator was the wrong type. It was for a 2004 and earlier XC90, and was self- regulating. The 2005 and newer models use a computer- controlled regulator. I called my parts supplier, and found that the alternator they sold me, Bosch P/N "AL0820X," was indeed listed in the paper catalog for almost ALL Volvo 5- cylinder cars from 1999 to 2007. Upon calling several other parts stores, I discovered that all of them listed the same P/N... except FCPgroton. They showed another P/N, "AL0854X." When I tried to get that unit from a local parts store, no one had it even available. Finally, I called Bosch tech support, and the person there said that AL0820X used to be the number they specified for the 05 and newer vehicles, but that they were "running into issues" with it on those cars, so now there's a different P/N (with the correct regulator.) The problem is- this is a totally new application, and NO ONE has it available. FCPgroton has it on back- order, with an expected arrival date in April, but that was revised last Monday, when it was supposed to have been in. I ended up replacing the alternator with one from Volvo, at much higher cost. Now, 2 months and 3 alternator replacements later, the car is working as intended. So... the point of this long- winded post? If you have a need to replace the alternator in a 2005 or newer XC90 2.5T, MAKE ABSOLUTELY SURE to get the right one. Most parts stores' catalogs and computers, as of right now, show the older alternator as being the correct one, but it's not! It will work... kind of... but it will erratically supply too much or too little current, which WILL lead to premature battery failure. Fortunately, it doesn't overcharge voltage- wise, as that could cause damage to other systems. The correct Bosch P/N (if you have the 140A alternator) is AL0854X (or "N" in place of the X if you want a brand- new unit) This is a brand- new application, and the only place I've found, after several hours of searching, that actually lists it is FCPgroton... who at this moment can't actually GET it(!) Hopefully, you won't need a new alternator this early on on a 2005 or newer model, but if you do... I hope this will save you the aggravation that this example of "overconsolidation" on the part of parts suppliers has caused.
thanks for sharing - now I have a 07 - xc90 - and I need to know where the emergency shut off valve is - the one for in case of accident. ? a customer who has their car at home had an accident and now their car won't start - any help here is appreciated - - can you help? Please send the answer to riceski@gmail.com - also I need any online repair manual that is free for my coustomers - -man you are one of the best.
Thanks
Gary Rice
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  #4  
Old 04-23-2010, 07:47 PM
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Really, thanks! You're the best!
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  #5  
Old 05-01-2010, 11:57 PM
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Join Date: May 2010
Location: FL
Posts: 754
Default

there is no "inertia switch" like they use in fords, on volvos. there is other problems with no start.


If you want the right alternator with no problems, the dealer can assist with that.


I have seen these messages with non-oem alternators and they run fine, so far...

Last edited by SVTfocusO3; 05-01-2010 at 11:59 PM.
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  #6  
Old 05-03-2010, 02:57 PM
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Join Date: May 2010
Posts: 1
Default

Help, I need to change my alternator, whats the best way to attack it.
And I did have it tested at a shop and its dead.
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  #7  
Old 10-24-2012, 06:11 PM
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Join Date: Jul 2012
Posts: 12
Default

wow.....I have a 05 v50 non-turbo, and have exactly the same problem-battery light/Red urgent power mssg....had the alternator remanned, but evidently wrong regulator was placed in it----additionally, the DEALER cannot even order the regulator-it's not available !, I am going to look at the FCPgroton site and see if they might have one available...otherwise I am of a mind to call Swedishautoparts.com to see if an alternator cooresponding to my vin/etc will be available, and work(!?)---MO' LATER!
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  #8  
Old 02-02-2013, 03:26 PM
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Posts: 43
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What a nightmare! You would make a great detective, but we need competent mechanics even more so. Thanks!
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  #9  
Old 02-03-2013, 10:19 AM
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Join Date: Jul 2012
Posts: 12
Default

Well, I finally got a new remanned alternator from Volvo (ordered by my mechanic, so I got 10% off Volvo dealership cost)...since then NO trouble with alternator, and after the air mass meter debaucle was solved, I am now pleased to report my 2005 V50 is running like a gem ....a beauty.....now to get this issue with crappy low beam headlights amended. lol
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  #10  
Old 05-31-2013, 01:01 PM
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Join Date: May 2013
Posts: 1
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Just like to say thank you, a great thread that has really helped me understand an issue with a 2005 XC90.
Hopefully things have moved on and I can get the correct alternator fitted as I think the wrong one has been fitted
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Old 05-31-2013, 01:01 PM
 
 
 
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460, alternator, change, cost, forum, noisy, replace, replacing, s40, s70, time, v50, v8, volvo, wagon, xc90


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