We have a
2017 1.8L LT with "RS" designation on the grill . .. +13K miles and a daily driver. All good so far except changed out the terrible Hankook tires the first week of owning it.
In 2017 .. . the refresh year for Sonic. . .
"RS" was mainly a cosmetic exterior/interior treatment with the
RS labeled flat bottom steering wheel (hatchback only), Red stitched seats and carpet mats plus a few other things.
Our 2017 is an LT, but has the RS design bits all over it. Of course, not any engine or suspension bits like in previous "RS" trim levels.
So for +2017 the "RS" may or may not be a true "RS".