Here is my two cents after putting 50K on my A4 which I purchased at 120K. Very reliable engine, manual transmission (same OEM clutch at 170K), no major electrical problems. What has failed, cruise control, driver side heated seat, thermostat. I believe overall it is a very reliable car, sensors that I have replaced along the way are just the same on all cars these days, all made by BOSCH and it doesn't make a difference which brand you drive. In terms of interior/exterior design, ergonomics and build quality Audi is never any less than other Germans and maybe much better in some of these areas if not all. The up side is because of its reputation here in USA, you can get them much cheaper!!
Design, reliability, affordability (second hand)
Electrical components, nobody can fix those, be sure to properly test all components before you buy. Turbo versions require more frequent repairs/maintenances and turbo itself fails around 70-90K. Go with the non turbo!
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