I got noticed by my mechanic at my most recent oil change that he performed a multi point inspection on my 2004 Lexus rx 330 3.3 liter v6 all wheel drive and told me about 2 points out of 32 non urgent which I should take in mind 1. The engine air filter is slightly dirty
2. The rear brakes are in fair condition 4mm to 5mm
What should I do?
1. The engine air filter is slightly dirty
If it’s been more than 20,000 miles since it was last changed, and your gas mileage/acceleration is affected, go ahead and replace it. Use only OEM/good quality replacement air filter.
2. The rear brakes are in fair condition 4mm to 5mm
That’s normal and should be replaced when they get down to 3mm.
What about other fluids such as transmission fluid, brake fluid, power steering fluid and coolant?
All the best!
I got noticed to change the brake fluid because it was low and dirty and I did. And since than they didn't notice me anymore anything besides one time they told me that due to the high mileage my vehicle is due for a tune up
You didn’t mention the mileage, but a tune up is generally a good idea if it’s never been done before. Regarding your brake job, are you facing any steering wheel vibrations during high speed braking (>50mph)? If you are, replace both the brake rotors/discs and brake pads. If you don’t suffer from any vibrations during braking, replace just the brake pads. Use OEM rotors/discs and Akebono ceramic brake pads. All the best!
https://youtu.be/9KflqUou-NU
I agree with @InThrustWeTrust,
You might want to factor in your near-term usage. If you plan to travel during the summer and do long road-trips which would span 1000s of miles then it would be safer to change them before traveling. If you plan to putt around town, they should serve you well for the near-term.
Thank you
Now my question is which part of the brake I should replace the rotor the disc or the caliper or the pad?
That depends on the condition of the said components.
Rotors: usually need replacement if they are thinning out or are warped. can be felt as pulsations in the steering when you hit the brakes. Your mechanic would measure it with a caliper and tell you if you need one.
Calipers: these are tricky to detect unless you notice uneven wear in the brakes or our you notice your brakes 'stick' when you slam the brakes.
Brakepads: since you mechanic suggested this, it makes sense to replace them in pairs or all 4 if you are going to drive extensively in the near-term. Why I said all 4, you would want your "stronger" brakes to be in the front since it gives more control while braking hard.