2020 Toyota Corolla Engine Problems
NHTSA component category: ENGINE · data through 07/14/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How engine ranks on this vehicle
Share of the 300 complaints citing each category; one complaint can cite several. Full breakdown on the 2020 Toyota Corolla overview page.
What owners report
“The coolant bypass valve in some Toyota models has been malfunctioning recently and has become a common issue. Dealer confirmed that this was the issue…”NHTSA complaint 11568354 — filed 01/28/2024
“Around 40k miles I received an Engine Maintenance Required warning. After some research Engine Maintenance and Engine Service Required are two very different indicators. I…”NHTSA complaint 11566170 — filed 01/17/2024
“Coolant bypass valve failure. Replacement part carried the same defect.”NHTSA complaint 11557060 — filed 11/27/2023
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Engine complaints by year filed
Frequently asked questions
Does the 2020 Toyota Corolla have engine problems?
Engine is the most-reported problem area on the 2020 Toyota Corolla: 107 of 300 complaints on file (35.7%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2020 Toyota Corolla have in total?
300 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 22 involved a crash, 1 involved a fire, 23 reported injuries, and 1 reported deaths.
What does NHTSA's engine category include?
NHTSA assigns each complaint to standard component categories; this page reports the ENGINE category exactly as NHTSA defines and records it.
