Can this be done by an independent mechanic or does it have to be lexus dealer?

 

anything can be done by an independent mechanic however will this void your warranty is an entirely different question LOL

 

No. Won't void your warranty.

Take it to a reputable independent that services newer cars. look around at their shop and see how tidy and clean it is. don't go to one of those shops where the dudes are covered in grease and working on 89 tercels. you get what you pay for. but honestly ask a dealer too. you may be surprised at how cheap it is. if it's the same price or not much more, i'd go dealer all the way. besides seeing as your car is a '14, you likely don't have a warranty left anyway unless you bought your car in 10/11/ or 12 of 14 and have less than 50k.

 

What's wrong with 89 tercels? If that's what the customer brings in that's what gets fixed...
And you try to work on a truck that's 8+years old and has been under coated every year and not get covered in grease. If the mechanics are getting into cars covered in grease that's a different story, that's not ok, but a greasy mechanic isn't a bad mechanic.

I've worked on a car worth 10 cents and another worth over 100k in the same day, they both get treated with the same high level of respect. Not everyone can afford an expensive car, doesn't mean they don't deserve good work.

There local Hyundai dealer is nice and new and super clean with very chic looking mechanics. Yet a lady brought us a 5 year old Santa fe with an 1800$ estimate they gave her. After going over each thing with a fine tooth comb we recommended a couple things within the next year but found no reason to replace anything and didn't charge her a penny.

Word of mouth is how you find a good independent shop, ask your friends and neighbors. Looks can be deceiving...