There are 3 owner-reported electrical system complaints for the 2020 Lexus ES in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
• Frequent Battery Replacements: My vehicle is now on its third battery within a five-year lifespan. The previous owner replaced the battery two years ago when the vehicle was only two years old, and I recently had to replace it again. • Unacceptable Battery Lifespan: No vehicle should require a new battery every two years under normal conditions. This strongly suggests an underlying defect in the battery, charging system, or electrical components. • Lack of Manufacturer Remedy: Despite dozens, if not hundreds, of complaints from other 2020 Lexus ES 350 owners online describing the exact same issue, Lexus has not issued a recall or service bulletin to investigate or resolve the problem. • Misleading Battery Warranty: Lexus advertises its 84-month battery warranty, but this is misleading. In reality, it only provides a full replacement for the first 24 months, while the remaining coverage period is prorated, meaning owners are still required to pay a portion of the cost after just two years. This is deceptive marketing that fails to reflect the true coverage provided. • Potential Safety Hazard: Frequent battery failures could leave drivers stranded unexpectedly, which poses a serious safety risk in various situations (e.g., extreme weather, remote locations, or high-traffic areas). • Lexus’ Partial Acknowledgment of the Issue: This battery issue appears to be somewhat acknowledged by Lexus because they replaced the original battery with a much larger Cold Cranking Amps (CCA) version than what comes standard in the ES 350. The factory-installed battery is rated at 640 CCA, but the replacement Lexus provides is 770 CCA. After researching, I found that this larger battery is typically used in the Lexus LS model, which is a much larger, more powerful vehicle requiring a bigger battery. Despite this upgrade, the replacement battery still fails within two years, indicating that there is an underlying issue causing premature battery failure beyond just battery capacity.
On Friday, June 03, 2022 as I was leaving the dealership in the 2020 Lexus ES 350 loaner vehicle, I put the car in reverse to back away from the wall, and then put the car from reverse into drive that resulted in it lurching forward momentarily. I did not hear the engine revving, probably because I wasn’t paying attention, but my partner who was seated next to me in the driver’s seat said he heard it. He suspected that the dealership loaned us the vehicle that had a similar issue that caused it to move forward. When I saw the definition of sudden unintended acceleration, I felt that it could be that. I didn’t think it was me. I drove the Lexus home, which was across the street from the dealership and no one drove it during the next few days. On Tuesday, June 07, 2022, we were scheduled for a medical appointment 80 miles away. My partner cancelled it but I decided to take the Lexus out to the store and there was no incident so the appointment was rescheduled for June 09. On Thursday, June 09, 2022 at about 11:30AM PDT, I brought the 2020 Lexus ES 350 loaner vehicle to a stop using the brake pedal. The car was about 12 feet from a landscaped island that separated two parking areas. I was looking to find a parking space that had tree shade. Without moving my foot off the brake, the engine began revving at the same time the Lexus sped forward on its own. I was fully cognizant of what I was doing and what was happening specifically because of what had occurred the Friday before. At the time that the vehicle moved forward, I was doing nothing but pressing my foot on the break. There was nothing obstructing the pedals on the floor as we had made sure of that during the preparation for the trip. The rate of speed that the vehicle was going when it jumped the curb of a landscaped island no more that 3 or 4 feet in diameter is something I would have never normally been able to achieve. The heavy metal pole on the other side bent when it hit. The front wheel
The DCM not working.. i did update and rest the DCM my Dealership and still not working
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Sep 8, 2026