2012 RX350, near 100k miles - mostly highway miles, though Midwest. Garage-kept, well-maintained, works great. Suggestions or just have dealer follow the manual? I don’t “break what’s not broke.”

 

Have you been having dealership change transmission fluid regularly in the vehicle and if transmission stopped working would you scrap the car or have Lexus dealership rebuild transmission, does transmission have any low speed whining sounds, how long do you plan on keeping the car on the road ? Does the car have tow package and is it used for towing or do you carry stuff on roof of car ? Have you had dealership change coolant in vehicle or will 100k be first time ? How often have cabin air filters been changed ? If you had to change brake rotors would you install new Lexus rotors or maybe go to better quality coated rotors ? Are there any oil leaks from valve covers or timing chain cover ? Is the vehicle FWD or AWD and if AWD have transfer and rear differential fluids been changed ? Are there any suspension concerns or does car still ride good, inexpensive things like swaybar bushings and swaybar end links can often make a car ride like new, when was last alignment done on car ? Has windshield been replaced or is it fairly sand blasted and cracked now ? Have hood or tailgate lift supports been changed ? What products are being used to maintain hood, door and tailgate seals ? Guessing that you know percentage of front and rear brake and rotor wear and water content of brake fluid ? Are you still using 0w20 motor oil or something else ?

 

If you cannot DIY, find a well-respected long-time-in-business locally-owned indie shop that knows Toyotas well. You will be far better off there than you would be going to any dealership.

 

5w-30 oil is fine too, probably even better