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Service bulletins for the 2021 Toyota Corolla

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

181 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Brakes are shown. Show all

Bulletins, newest first
TSB0104212024-04-01. Service bulletin. SERVICE BRAKES, HYDRAULIC; ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING:COOLING SYSTEM; LANE DEPARTURE. TSB: Some 2018 ? 2024 model year Toyota vehicles equipped with an A25A-FKS, A25A-FXS, M20A-FKS, or M20A-FXS engine may exhibit one or more of the following conditions: ?Milky/discolored engine oil. ?An ?Oil Pressure Low? warning message on the Multi-information Display (MID). ?A MIL ON condition with Diagnostic Trouble Codes (DTCs) P05202A (Engine Oil Pressure Sensor/Switch ?A? Signal Stuck in Range) and/or P052477 (Engine Oil Pressure Too Low [Severe]) present. Moisture from blow-by gases condenses and accumulates in the engine oil during short trips in extreme cold weather. When the moisture in the oil freezes, the oil pressure may drop, and the aforementioned warning indicators may display. Follow the procedures in this bulletin to address these conditions.
T-TT-0732-232023-05-15. Service bulletin. BACK OVER PREVENTION; SERVICE BRAKES, HYDRAULIC:PEDALS AND LINKAGES. TT: Confirm the vehicle meets the following conditions: 1) Rattle noise is coming from the brake pedal bracket assembly area AND not from other areas of the vehicle 2) Mileage is under 20,000 miles 3) Vehicle has not had previous front brake repairs performed 4) Vehicle is located in California or Oregon If the vehicle meets the above criteria, please create a TAS case. TAS will provide further instruction. If it is a weekend or holiday, continue with diagnosis and repair If the vehicle does not meet the above criteria, please proceed to diagnose the vehicle using the applicable repair manual.
T-SB-0078-21 Rev2023-04-17. Service bulletin. EQUIPMENT; PARKING BRAKE; ELECTRICAL SYSTEM; LANE DEPARTURE. TSB: Some 2021 ? 2022 model year Corolla and Corolla Hatchback and 2021 model year RAV4 vehicles may exhibit a Parking Brake Malfunction warning message on the Multi-information Display (MID) with Diagnostic Trouble Code (DTC) C059746 (Brake System Control Module ?A? Calibration / Parameter Memory Failure) present. This bulletin addresses DTC C059746 only, it may appear before or after completing the Repair Procedure in this bulletin. No other condition or DTC should be present. If there are additional DTCs, continue diagnosis using applicable Repair Manual before completing the Repair Procedure outlined in this service bulletin
T-SB-0078-21 Rev2023-04-17. Service bulletin. PARKING BRAKE; LANE DEPARTURE; EQUIPMENT; ELECTRICAL SYSTEM. TSB: Some 2021 ? 2022 model year Corolla and Corolla Hatchback and 2021 model year RAV4 vehicles may exhibit a Parking Brake Malfunction warning message on the Multi-information Display (MID) with Diagnostic Trouble Code (DTC) C059746 (Brake System Control Module ?A? Calibration / Parameter Memory Failure) present. This bulletin addresses DTC C059746 only, it may appear before or after completing the Repair Procedure in this bulletin. No other condition or DTC should be present. If there are additional DTCs, continue diagnosis using applicable Repair Manual before completing the Repair Procedure outlined in this service bulletin
TTT0636202022-06-21. Service bulletin. BACK OVER PREVENTION; SERVICE BRAKES, HYDRAULIC. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions
T-SB-0078-212021-10-25. Service bulletin. PARKING BRAKE. TSB: Some 2020 ? 2021 model year Corolla, Corolla Hatchback, and RAV4 vehicles may exhibit a Parking Brake Malfunction warning message on the Multi-information Display (MID) with Diagnostic Trouble Code (DTC) C059746 (Brake System Control Module "A" Calibration / Parameter Memory Failure) present. Follow the Repair Procedure in this service bulletin to address this condition.
T-TT-0636-20 Rev2021-04-19. Service bulletin. BACK OVER PREVENTION; SERVICE BRAKES. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions.
T-TT-0636-202021-02-16. Service bulletin. BACK OVER PREVENTION; SERVICE BRAKES. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions.
T-TT-0636-202021-02-01. Service bulletin. SERVICE BRAKES, HYDRAULIC. TT: Some Toyota vehicles installed with Toyota Complete Maintenance Care (TCMC) brake pads may exhibit a groan or squeak noise in various driving conditions.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.