2020 Toyota Corolla · symptom sheet
Engine overheats or leaks coolant
- 89owner reports
- 55,000median miles
- $750median quote
- 1involved a crash
Newest report Aug 6, 2026 · checked Oct 2, 2026
109 of the 306 complaints on this car are about the engine. 89 of those describe overheating, which makes it the most reported problem on the 2020 Corolla.
Tick what matches of 89 reports
Overheating on other Corolla years
Report counts are for each model year on its own, so a newer car has had less time to collect them. Model years with too few reports of it for a sheet: 2014, 2015, 2016, 2017, 2018, 2019, 2022, 2026.
What this problem usually is
Most owners in this group notice the coolant before they notice the heat: a reservoir that keeps dropping, a sweet smell, or a bright puddle under the front of the car. Across the vehicles on this site, about four in five of these complaints mention coolant, a leak or a puddle, and roughly two in five mention the temperature gauge or overheating.
What got replaced
Few of these reports name the part that was replaced.
Recalls and investigations
No recall on the engine covers the 2020 model year as of Oct 2, 2026.
NHTSA investigations into the engine on the Corolla
Engine stall. Closed sep 16, 2010, led to recall 10V-384.
Engine stalling. Closed aug 19, 2010, led to recall 10V-384.
None of these investigations covers the 2020 model year.
What owners paid
34 of the 89 reports quote a price. Each dot is one quote. The middle half runs $200 to $800.
When it happens
The middle half of failures fell between 40,000 and 60,000 miles, from the 32 reports that gave a mileage.
Is this a known problem?
The manufacturer has sent NHTSA 9 service bulletins or notices for the 2020 Toyota Corolla that deal with this problem. Newest first.
Federal rules make a manufacturer send NHTSA a copy of any notice about a defect that goes to more than one dealer or owner. Most of these are service bulletins, the repair instructions manufacturers send to dealers. NHTSA generally leaves safety recall bulletins out of this file, and recalls are listed separately.
Although the flow shut-off valve is covered by Toyota’s New Vehicle Limited Warranty for 36 months or 36,000 miles (whichever comes first), we at Toyota care about the customers’ ownership experience.
The specific condition covered by this program is for a small engine coolant leak that can occur from the flow shut-off valve that can allow coolant to drip on other parts of the vehicle.
Some 2018 – 2021 model year Toyota vehicles equipped with an A25A-FKS, A25A-FXS, or M20A-FKS engine may exhibit a condition in which an “Engine Maintenance Required” message is displayed in the Multi-Information Display (MID).
CUSTOMER SUPPORT PROGRAM 24TE04 Multiple Model & Model Year Toyota Vehicles Coverage for Flow Shut-off Valve Coolant Leak Frequently Asked Questions
5 more on the 2020 Toyota Corolla page.
What owners wrote
“engine maintenance required notification popping up. told i needed to replace engine coolant bypass valve. safety is at risk because the notification blocks my speedometer . dealer has confirmed that the engine bypass valve needs to be replaced and this happens with all toyotas around 40k miles. has been inspected by dealership. notification popped up on my car about two weeks ago.”
Filed Jul 3, 2024 · 40,000 miles
“Coolant Bypass Valve seems to have an issue at 60k miles which seems to happen to many people at mileage even lower than mine sometimes! My dad had this issue on his 2021 Corolla at 50k miles.”
Filed Jun 26, 2024 · 60,000 miles
“The engine coolant bypass valve is coming up as a code. Around 44k miles. Others have had this problem.”
Filed Jun 18, 2024 · 44,000 miles
“The coolant bypass valve was constructed of poor quality plastic, and has cracked at a mere 50,000 miles. It's Leaking coolant into the sensor. Along with potentially causing major damage to the engine.”
Filed May 20, 2024 · 50,000 miles
Should you keep driving it?
This page can't tell you that. 1 of 89 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.
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