I've got a 2016 Q50 that's developed this annoying rough idle when I'm stopped at lights, and the dealer wants to charge me just to run a diagnostic without even promising they'll find the issue. A friend who drives an FX35 pointed me to https://alzaabiautocare.com/brands/infiniti/ and said they actually know these cars because they see a lot of them, but I'm always nervous about taking my car somewhere new after a bad experience with a place that claimed they could fix Infinitis and ended up messing up my AC controls. Has anyone here actually used them for something more than an oil change, like sensor replacements or timing chain work? I just want a shop that won't treat my car like a Nissan and actually understands the differences.