Spacers can not mess up your AWD, incorrect tire sizes will, but not the spacers.
When you buy spacers I suggest you spend little extra money on high quality products H&R, Eibach, KW, ST Suspensions, Adaptec Speedware, Motorsport Tech. I would clearly stay away from non-brand el-cheapo eBay stuff. Wheel spacers aren't something to f*** with, imagine your wheel falling off while doing 80 on highway, that's pretty damn scary imo...

https://www.clublexus.com/forums/is-...d-h-and-r.html

 

Nope. AWD will mess up if the rolling diameter of your wheels are off, spacers just push the wheel out so you're fine. I put a 20mm spacer on the rear of my car with ARP extended studs and I was still able to run the OEM lug nuts.

 

 

Spacers and offsets change the scrub radius. Highway cars are not impacted. Grocery getters, parking lot taxies may need a toe adjustment to preserve tires edges.