Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Under Hood
General Maintenance
GENERAL MAINTENANCE
PROCEDURE
1. GENERAL NOTES
- Maintenance requirements vary depending on country.
- Check the maintenance schedule in the owner's manual.
- Following the maintenance schedule is mandatory.
- Determine the appropriate time to service the vehicle using either miles driven or time (months) elapsed, whichever reaches the specification first.
- Maintain similar intervals between periodic maintenance unless noted.
- Failing to check each vehicle part could lead to poor engine performance and increased exhaust emissions.
2. WINDSHIELD WASHER FLUID
(a) Check that there is sufficient fluid in the tank.
3. ENGINE COOLANT LEVEL
(a) Check that the coolant level is between the "FULL" and "LOW" lines on the see-through reservoir.
4. RADIATOR AND HOSES
(a) Check that the front of the radiator is clean and not blocked by leaves, dirt and bugs.
(b) Check the radiator and hoses for:
- Damage
- Cracks
- Kinks
- Corrosion
- Rot
- Clogging
- Leaks
5. BATTERY ELECTROLYTE LEVEL
(a) Check that the electrolyte level of all the battery cells is between the upper and lower level lines on the case.
HINT:
If the electrolyte level is difficult to see, lightly shake the vehicle.
6. BRAKE FLUID LEVEL
(a) Check that the brake fluid level is near the upper level line on the see-through reservoir.
7. ENGINE DRIVE BELT
(a) Check the drive belt for fraying, cracks, wear or oil.
8. ENGINE OIL LEVEL
(a) Check that the engine oil level is between the full level and low level marks on the dipstick with the engine turned off.
9. EXHAUST SYSTEM
(a) Visually inspect for severe corrosion, cracks, holes or loose supports.
HINT:
If any change in the sound of the exhaust or smell of the exhaust fumes is noticed, inspect and repair the exhaust system.