Whether it's a Renegade or Outlander the mechanics of both machines are identical except for the suspension so I doubt whether there are mechanical glitches in the Renegade that don't exist in the Outlanders. I have an 06 Outlander(first production run) that experienced it's first mechanical problem which was a leaking valve cover gasket, personally I think the guy at the shop tweaked it because it started leaking the first time I used it after getting it out of the shop for it's service.
I'd argue that most mechanical problems are the result of poor maintenance and/or rough use of the machine. I'm not suggesting this is why you've had problems, sometimes mechanical devices just fail for no apparent reason.
FWIW rode my Outlander pretty hard when I first got it and even did a few races, the worst problem I've had is with flat tires.
06 Outlander 800, 25" Kenda Bounty Hunters front, 25" Duro Power Grips rear, HMF Penland Exhaust,HPG front shocks, billet shifter, racks removed, XT handguards, plastic skids,
07 Renegade, fully stock.
97 Jeep Grand Cherokee 5.2 litre 4x4
06 Saturn Ion-Commuter car 35 mpg at 65 MPH
Yamaha Bear Tracker,Yamaha Bruin350,Bombardier DS650,Honda Rincon 650,Outlander 330 4x4,Outlander 800,Renegade 800,Yamaha TTR 250 trail bike',1973 Yamaha 350 Snowmobile