Toyota bZ4X Owner's Manual: Do-it-yourself maintenance

If you decide to perform maintenance yourself, be sure to adhere strictly to the procedures outlined in the sections below. Following the proper steps is critical to your safety and the continued reliability of your vehicle.

Maintenance

Item: 12-Volt Battery Condition

Check the battery’s terminals and overall condition periodically.

Parts and Tools Required:

• Warm water
• Baking soda
• Grease
• A conventional wrench (for loosening or tightening terminal clamp bolts)

Item: Brake Fluid Level

Ensure that the brake fluid in your system is maintained at the proper level.

Parts and Tools Required:

• FMVSS No.116 DOT 3 (or SAE J1703) brake fluid or FMVSS No.116 DOT 4 (or SAE J1704) brake fluid
• A clean rag or paper towel
• A funnel (used solely for adding brake fluid)

Item: Power Control Unit Coolant Level

Maintaining the correct coolant level prevents overheating and protects the battery cooling system.

Parts and Tools Required:

• Use "Toyota Genuine Traction Battery Coolant" or a similar high-quality, ethylene glycol-based coolant that is low in electrical conductivity, non-amine, and non-borate with azole additives.
• A funnel (for adding coolant)

Item: Heater Coolant Level

Make sure the heater coolant level is as specified to maintain optimal climate control.

Parts and Tools Required:

• Use "Toyota Super Long Life Coolant" or an equivalent coolant formulated with high-quality ethylene glycol that is non-silicate, non-amine, non-nitrite, and non-borate. This coolant is pre-mixed with 50% coolant and 50% deionized water to ensure durability and performance.
• A funnel (solely for adding coolant)

Item: Fuses

Inspect fuse integrity and replace any defective fuses.

Parts and Tools Required:

A fuse with the same amperage rating as the original should be used.

Item: Headlight Aim

Proper headlight alignment is essential for safe nighttime driving.

Parts and Tools Required:

A Phillips-head screwdriver is needed to adjust the headlight aim.

Item: Radiator and Condenser

These components must remain clear of obstructions to ensure effective cooling. No additional parts or tools are typically required for a visual inspection.

Item: Tire Inflation Pressure

Regularly check that your tires are inflated to the manufacturer’s recommended pressure for optimal performance and safety.

Parts and Tools Required:

• A tire pressure gauge
• An appropriate compressed air source

Item: Washer Fluid

Maintain a sufficient level of washer fluid; this is especially important during winter conditions when antifreeze is added.

Parts and Tools Required:

• Either water or a washer fluid solution containing antifreeze for winter use
• A funnel (exclusively for adding water or washer fluid)

WARNING

The motor compartment contains numerous mechanisms and fluids that can move unexpectedly, become extremely hot, or be electrically energized.

To avoid death or serious injury, please observe the following precautions:

When working in the motor compartment

• Ensure that the "POWER ON" indication on the multi-information display as well as the "READY" indicator are both off before you start any work.
• Keep your hands, clothing, and any tools well away from the moving fan to prevent injury.
• Do not touch the motor, power control unit, or radiator immediately after driving since these components may be very hot. Remember that coolant and other fluids can also reach high temperatures.
• Avoid leaving any flammable materials, such as paper or rags, in the motor compartment.
• Refrain from smoking or creating sparks near the 12-volt battery, as its fumes are highly flammable.
• Exercise extreme caution when working around the 12-volt battery, which contains poisonous and corrosive sulfuric acid. Wear protective gloves if necessary.
• Never touch, disassemble, remove, or replace any high voltage components, cables, or connectors. Improper handling could lead to severe burns or electric shock, potentially resulting in death or serious injury.

When working near the electric cooling fan or radiator grille

Always ensure the power switch is off. With the power left on, the electric cooling fan may automatically activate-especially if the air conditioning is running or the coolant temperature is high.

Safety Glasses

Wear safety glasses at all times to protect your eyes from potential flying debris or fluid sprays.

Hood

When performing maintenance around the hood, take care to avoid contact with any moving parts or residual heat. Proper caution will help prevent accidental burns or other injuries.

Undertaking your own vehicle maintenance can save time and money, but it must be executed carefully and according to the manufacturer’s instructions. Whether you’re checking the brake fluid, inspecting the battery, or adjusting the headlight aim, each task requires the correct tools and precise procedures. If performed correctly, DIY maintenance not only contributes to the longevity of your vehicle but also upholds its safety standards.

Always keep in mind that for optimal reliability and safety-especially for premium vehicles like the 2024 Toyota bZ4X-using genuine parts and following approved service instructions is vital. Should you encounter any uncertainties, or if the maintenance extends beyond your expertise, consult a certified Toyota dealer promptly.

Maintaining your vehicle with consistent, proper DIY care ensures that every drive is as safe and efficient as possible while also protecting your investment in a technologically advanced machine. Embrace regular upkeep, observe all safety precautions, and enjoy the peace of mind that comes with knowing your vehicle is well-maintained.

Opening the hood

1. Pull the hood lock release lever.

The hood will pop up slightly.

2. Push the auxiliary catch lever to the left and lift the hood.

3. Hold the hood open by inserting the supporting rod into the slot.