What alternator for 2007 Yaris? - Toyota Yaris Forums

06YarisRS · 11-03-2019, 09:04 AM

The internal voltage regulator is a common failure point as the contacts corrode due to water ingress. One of my Yari runs at ~ 13.8 - 13.9 and the other ~14.2 - 14.4. Both have passed voltage drop tests and neither have any driveability or starting problems. I too looked at an upgraded alternator as I was adding some additional electronics (stereo with amp 75w x 4 and NVX 8" powered sub etc), but the stock 80 amp alternator has proved more than capable of handling the power demands. I think the upgraded alternator I was looking at was 120A. Since your alternator tested good and you don't have a flickering or steady battery light on in the instrument cluster, you're probably fine. Then again, if you drive your amp hard, an upgrade might be a good option.

Here is an upgraded 145 amp alternator for 06 - 14:

https://www.ebay.com/itm/High-Output...cAAOSwI4xa4l9L

11-03-2019, 09:04 AM	#5
06YarisRS View User's Garage Drives: 06 2ZR Turbo Yaris RS Join Date: Aug 2017 Location: Fredericton, New Brunswick, Canada Posts: 2,384	The internal voltage regulator is a common failure point as the contacts corrode due to water ingress. One of my Yari runs at ~ 13.8 - 13.9 and the other ~14.2 - 14.4. Both have passed voltage drop tests and neither have any driveability or starting problems. I too looked at an upgraded alternator as I was adding some additional electronics (stereo with amp 75w x 4 and NVX 8" powered sub etc), but the stock 80 amp alternator has proved more than capable of handling the power demands. I think the upgraded alternator I was looking at was 120A. Since your alternator tested good and you don't have a flickering or steady battery light on in the instrument cluster, you're probably fine. Then again, if you drive your amp hard, an upgrade might be a good option. Here is an upgraded 145 amp alternator for 06 - 14: https://www.ebay.com/itm/High-Output...cAAOSwI4xa4l9L __________________ 2006 Yaris 5 Door RS 2ZR-FE (2011 Corolla 1.8L) Swapped, Automatic, T-28 Turbocharged (8 psi), HSD MonoPro Coilovers, DIY W/M Injection, custom 3" cold air intake, custom 2.5" exhaust, TRD rear sway bar, Penguin Garage 13mm spacers (rear), custom Civic front lip, full repaint, Android 6.0 7" touchscreen, Rockford Fosgate speakers, tweeters, NVX underseat subwoofer https://www.instagram.com/2zr_turbo_yarisrs/

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