Toyota Corolla: Maintenance and care / Do-it-yourself maintenance

Emission inspection and maintenance (I/M) programs

Some states have vehicle emission inspection programs which include OBD (On Board Diagnostics) checks. The OBD system monitors the operation of the emission control system...

Do-it-yourself service precautions

If you perform maintenance by yourself, be sure to follow the correct procedure as given in these sections. Maintenance WARNING The engine compartment contains many mechanisms and fluids that may move suddenly, become hot, or become electrically energized...

Other information:

Toyota Corolla 2019-2026 Owners Manual: Exhaust gas precautions

Harmful substance to the human body is included in exhaust gases if inhaled. WARNING Exhaust gases include harmful carbon monoxide (CO), which is colorless and odorless. Observe the following precautions. Failure to do so may cause exhaust gases enter the vehicle and may lead to an accident caused by light-headedness, or may lead to death or a serious health hazard...

Toyota Corolla 2019-2026 Owners Manual: Replacing the battery

► Vehicles without a smart key system 1 Remove the key cover. To prevent damage to the key, cover the tip of the flathead screwdriver with a rag. 2 Remove the battery cover. If the battery cover is difficult to remove, lift the edge to remove it. 3 Remove the depleted battery using a small flathead screwdriver...