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Toyota Corolla DIY Maintenance & Repair Guides
Links to DIY repair guides and vehicle maintenance how-to tutorials for the 12th generation 2020 Corolla sedan.

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2020, 2021 & 2022 Toyota Corolla Sedan Key Fob Battery Replacement Guide
Key Fob Battery Change

1. 2020, 2021 & 2022 Toyota Corolla Key Fob Battery Replacement Guide

After a few years of daily use, the coin cell battery inside the key fob remote control for your 12th generation 2020, 2021, 2022 (and probably also the 2023, 2024 & 2025) Toyota Corolla sedan (plus the new 2019 hatchback model) can become weak or stop working entirely.

Check out the DIY tutorial for changing the battery by clicking on the text link above or the thumbnail image on the left.

   


Map Light Bulbs Change

2. 2020, 2021 & 2022 Toyota Corolla Map Light Bulbs Replacement Guide

If you need to change a burnt out map light bulb in the overhead console of your twelfth generation 2019 (hatchback), 2020, 2021 and 2022 Toyota Corolla sedan, take a look at the DIY instructions for the procedure (with the compatible replacement part number) by clicking on the text link above or the thumbnail image on the left.

   

2020 Toyota Corolla Vanity Mirror Light Bulbs Replacement Guide
Vanity Mirror Light Bulb

3. 2020, 2021 & 2022 Toyota Corolla Vanity Mirror Light Bulbs Replacement Guide

If you need to change a burnt out vanity mirror light bulb located in the housing attached to the headliner above the sun visor, check out the DIY directions for the procedure (with the compatible replacement part number) by clicking on the text link above or the thumbnail picture located on the left side of this paragraph.

   


Cabin Air Filter Change

4. 2020, 2021 & 2022 Toyota Corolla A/C Cabin Air Filter Replacement Guide

If the air conditioning system in your Corolla hasn't been working well recently or the air coming out of the vents smells a bit musty or moldy, you probably need to change the cabin air filter element located in the HVAC blower motor housing.

To view the DIY tutorial for the procedure (with the compatible replacement part numbers), click on the text link above or the thumbnail image on the left.

   

2020 Toyota Corolla Dome Light Bulb Replacement Guide
Dome Light Bulb Change

5. 2020, 2021 & 2022 Toyota Corolla Dome Light Bulb Replacement Guide

If you need to change a burnt out dome light bulb in the housing attached to the headliner above the rear passenger seats in your Corolla, check out the DIY tutorial for the procedure (with the compatible replacement part number) by clicking on the text link above or the thumbnail image on the left.

   

2020 Toyota Corolla Plastic Interior Door Panel Removal Guide
Door Panel Removal

6. 2020, 2021 & 2022 Toyota Corolla Interior Door Panel Removal Guide

If you'd like to OEM speakers in your twelfth generation Toyota Corolla (2019 hatchback, 2020, 2021 & 2022 sedan), you'll have to take off the plastic interior door panels.

To view the DIY tutorial for the procedure (with the compatible replacement aftermarket speaker sizes), click on the text link above or the thumbnail image on the left.

   

2020, 2021 & 2022 Toyota Corolla Tail Light Bulbs Replacement Guide
Tail Light Bulbs Change

7. 2020, 2021 & 2022 Toyota Corolla Tail Light Bulbs Replacement Guide

The tail light housings of a 12th generation Corolla contain the rear turn signal and rear side marker light bulbs. Check out the DIY steps for changing the bulbs (with the part numbers) by clicking on the text link above or the thumbnail image on the left.

(The brake light is composed of LED bulbs that should last the life time of the vehicle.)

   

2020, 2021 & 2022 Toyota Corolla Reverse Light Bulbs Replacement Guide
Reverse Light Bulbs

8. 2020, 2021 & 2022 Toyota Corolla Reverse Light Bulbs Replacement Guide

If you need to change a burnt out reverse light bulb (also known as the back-up light bulb) in the tail light housing attached to the trunk lid of your Corolla, take a look at the DIY instructions for the procedure (with the compatible replacement part numbers) by clicking on the text link above or the thumbnail image on the left side of this paragraph.

   

2020, 2021 & 2022 Toyota Corolla Automatic Transmission Shift Lock Release Guide
Shift Lock Release

9. 2020, 2021 & 2022 Toyota Corolla Shift Lock Release Guide

If your Corolla is equipped with an automatic transmission and has been disabled due to a dead battery or some other issue, you might need to manually change the gear selector from "Park" to "Neutral" in order to have the car towed or pushed by hand. To accomplish this, you'll need to use the shift lock release button located on the gear selector.

   

2020, 2021 & 2022 Toyota Corolla Front Turn Signal Light Bulb Replacement Guide
Front Turn Signal Bulb

10. 2020, 2021 & 2022 Toyota Corolla Front Turn Signal Light Bulb Replacement Guide

If you need to change a burnt out front turn signal light bulb located in the headlight housing of your Corolla, check out the DIY directions for the procedure (with the compatible replacement part number) by clicking on the text link above or the thumbnail image on the left. (The low and high beam headlight bulbs are LED lights that should last the lifetime of the vehicle.)

   

2020, 2021 & 2022 Toyota Corolla Front Side Marker Light Bulb Replacement Guide
Front Side Marker Bulb

11. 2020, 2021 & 2022 Toyota Corolla Front Side Marker Light Bulb Replacement Guide

If you need to change a burnt out front side marker light bulb in the headlight housing of your 12th generation (2019 hatchback, 2020, 2021 and 2022) Toyota Corolla sedan, take a look at the DIY instructions for the procedure (with the compatible replacement part number) by clicking on the text link above or the thumbnail picture on the left.

   

2020, 2021 & 2022 Toyota Corolla Trunk Light Bulb Replacement Guide
Trunk Light Bulb Change

12. 2020, 2021 & 2022 Toyota Corolla Trunk Light Bulb Replacement Guide

If you need to change a burnt out cargo area light bulb in the trunk of your 12th generation 2020, 2021 and 2022 Toyota Corolla sedan, take a look at the DIY steps for the procedure (with the compatible replacement part number) by clicking on the text link above or the thumbnail image on the left.

   

2020, 2021 & 2022 Toyota Corolla Electrical Fuse Replacement Guide
Electrical Fuse Change

13. 2020, 2021 & 2022 Toyota Corolla Electrical Fuses Replacement Guide

The best place to start when troubleshooting any electrical problem with your Toyota Corolla is to check for a blown fuse or a faulty relay in either the engine bay or the interior passenger compartment electrical panels.

To view the DIY directions for the procedure, click on the text link above or the thumbnail image located on the left side of the page.

   

2020, 2021 & 2022 Toyota Corolla Serpentine Accessory Belt Replacement Guide
Serpentine Belt Change

14. 2020, 2021 & 2022 Toyota Corolla Serpentine Accessory Belt Replacement Guide

The "drive belt" on the 2ZR-FAE 1.8L I4 engine should be inspected at 60,000 miles and every 150,000 miles after that. If the belt is damaged or worn, it should be replaced.

Check out the DIY tutorial for changing the serpentine accessory belt (with the compatible replacement part numbers) by clicking on the text link above or the thumbnail image.

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