My 2017 LS has only 25k and I’m considering having all the fluids changed. (Coolant, transmission, brake, differential, transfer case). Im not having any problems and on one hand I’m thinking if it ain’t broke don’t fix it but I’d like to keep the car for many more years. I’m wondering if anyone has done this and if doing this has caused any problems with leaking transmission not shifting check engine codes. The dealership didn’t have any recommendations for me regarding this so I’m a bit hesitant. Any other recommendations you might have would be greatly appreciated.

 

I would postpone coolant and transmission changes, but proceed with preventative brake fluid for sure (and pump at least 1.5qts thru), if it's AWD (transfer case?) - go ahead and change 2 diffs (front is LT, rear is LX fluids ONLY) and transfer case (LL80 fluid only). But, those 3 (diffs and case) are due at around 50k, as well as coolant and tranny fluid.
Educated opinion based on real life exp.

 

Your car is 6 soon to be 7 years old depending on production date, to me that's due.
I did my 13 model myself shortly after I got it at roughly 32k miles..took me about a month for everything but I wasn't in a rush and wasn't having any issues with the car.

You don't have to be in a rush either but it's probably a good idea to find a shop that at least sounds confident and informed about doing these services and not like the dealership you referred to in your post.

 

Agreed, now's the time to find an indy shop you like and trust. Being new to Lexus, be aware that many members here do that, as dealers are much more expensive and not always more competent than Indys.

 

At those miles and age I would only do the brake fluid, everything else is good.

 

I agree; transmission fluid and coolant are relatively stable. Brake fluid is a concern because it's very hygroscopic, hence the time schedule in addition to distance.