NHTSA Complaints · Active Recalls · California Lemon Law Data
The NHTSA tracks consumer complaints, manufacturer recalls, and safety investigations for every vehicle sold in the United States. These publicly available records are a critical resource for California lemon law cases because they establish patterns of recurring defects.
As of June 2026, the NHTSA has logged 6 complaints against the 2021 Toyota Prius. Each complaint is filed by a vehicle owner or lessee through the NHTSA’s Vehicle Safety Hotline or online portal at SaferCar.gov. You can review all 2021 Toyota Prius complaints directly on the NHTSA complaint database.
The 2021 Toyota Prius has generated 22 NHTSA complaints on file with the National Highway Traffic Safety Administration. If your 2021 Toyota Prius has experienced a defect that the dealer has been unable to repair after multiple visits, you may qualify for a full repurchase or replacement under California lemon law. Toyota pays all attorney fees when we prevail. You pay nothing.
Fuel and propulsion system defects can cause stalling, fuel leaks, or power loss — all substantial impairments of use and safety. The 2021 Toyota Prius has generated 2 NHTSA complaints for this defect category. Owner reports include: “When i am going down it's charging when the charge reaches 6 from 8 the engine starts working and stop changing at that point and the power continues …”
Advanced driver assistance system (ADAS) defects — including malfunctioning forward collision warnings, lane keep assist failures, and erratic automatic emergency braking — can create dangerous driving conditions. The 2021 Toyota Prius has 2 NHTSA complaints for this defect type. Owner reports include: “The contact owns a 2021 Toyota Prius. The contact stated while driving approximately 35 – 45 MPH, the vehicle independently accelerated. The brake pedal was depressed but failed to stop the vehicle immediately. The contact swerved around the vehicle in front and ended up on the opposite side of the roadway. The contact attempted to avoid oncoming traffic and swerving around all the other vehicles and ended up in a ravine. The contact’s husband depressed the START/STOP button from the passenger’s side to turn off the vehicle, enabling the vehicle to come to a stop. The contact restarted the vehicle and continued to drive the vehicle to the dealer at slow speeds. The dealer was unable to determine the cause of the failure. The vehicle was not repaired. The manufacturer was made aware of the failure by the dealer. The failure mileage was 56,000.” (NHTSA Complaint #11615271)
Advanced driver assistance system (ADAS) defects — including malfunctioning forward collision warnings, lane keep assist failures, and erratic automatic emergency braking — can create dangerous driving conditions. The 2021 Toyota Prius has 2 NHTSA complaints for this defect type. Owner reports include: “The Lane keeping assist used in radar cruise control mode during some drive cycles will attempt to maintain the vehicle position to the far extreme of the lane and in some cases actively veer out of the lane. My safety ant others can be put at risk when the vehicle behaves outside of its design parameters like this. To solve the issue the vehicle must be pulled over, turned off, then restarted. After the restart it will resume functioning normally, maintaining lane positioning as intended within the limits of the system. The trigger for this is unknown but could be speculated that it is drive cycle dependent and may start during initialization. The problem has not been reproduced by a dealer or service center due to its intermittent nature. There are no warning indicators or lamps on when this occurs.” (NHTSA Complaint #11532235)
Engine and cooling problems are among the most serious defects under California’s Song-Beverly Act. Owners of the 2021 Toyota Prius have reported issues including stalling, overheating, loss of power, rough idling, excessive oil consumption, and check engine lights that return after dealer repairs. With 2 NHTSA complaints on record, this defect pattern is well-documented. Owner reports include: “The car accelerated without my foot on the accelerator, brake did not respond, and I had to drive through grass and a rock-filled ditch until after about 10 seconds the car returned to my control.” (NHTSA Complaint #11526893)
Engine and cooling problems are among the most serious defects under California’s Song-Beverly Act. Owners of the 2021 Toyota Prius have reported issues including stalling, overheating, loss of power, rough idling, excessive oil consumption, and check engine lights that return after dealer repairs. With 2 NHTSA complaints on record, this defect pattern is well-documented. Owner reports include: “CARBON MONOXIDE SEEPS INTO THE PASSENGER CAR BUT DILLER CANNOT FIND IT AND DID NOT HAVE TOOLS TO DETECT CO LEVEL IN THE CAR. I CAN’T USE THIS CAR BECAUSE WAS POISONED MANY TIMES AND AFTER A SECOND CHECK-UP, THE LEVEL OF CO BECOMES HIGHER SO I CAN’T DRIVE THE CAR WITHOUT POISONING. PLEASE HELP ME. I AM WORRYING TO SELL MY CAR BECAUSE OTHER DRIVER WILL GET INJURY. THIS IS THE NEW CAR ONLY 7000 MILES.” (NHTSA Complaint #11416154)
As of the date of this review, no active recalls have been issued specifically for the 2021 Toyota Prius. Recall status can change at any time. Check your VIN at NHTSA.gov/recalls for the most current information. The absence of a recall does not mean your vehicle is defect-free — many lemon law claims proceed without a recall on file.
California’s Song-Beverly Consumer Warranty Act (Cal. Civ. Code §§ 1790–1795.8) is one of the strongest lemon laws in the United States. It protects buyers and lessees of new and certified pre-owned vehicles that develop substantial defects the manufacturer cannot repair after a reasonable number of attempts.
Under Cal. Civ. Code § 1793.22, a lemon law presumption is triggered when any of the following apply to your 2021 Toyota Prius:
Once the presumption is triggered, the burden shifts to Toyota to prove the vehicle is not a lemon. Under Cal. Civ. Code § 1794(d), Toyota must pay your attorney’s fees if you prevail — meaning qualified representation costs you nothing out of pocket.
If your 2021 Toyota Prius qualifies as a lemon under California law, Toyota may be legally required to:
Step 1: Document every repair visit. Keep all repair orders, work orders, and dealer invoices. Each visit counts as a repair attempt, even if the dealer says nothing is wrong.
Step 2: Keep returning for repairs. You must give Toyota a reasonable opportunity to fix the defect. Visit different authorized Toyota dealers if needed and ask for written documentation of each visit.
Step 3: Contact a California lemon law attorney. Once you believe the threshold has been met — 4 attempts for non-safety defects, 2 for safety defects, or 30 days out of service — contact an attorney for a free case evaluation. Under § 1794(d), Toyota pays your fees if you win.
Step 4: Send a demand letter. Your attorney will send Toyota a formal demand letter. Most California lemon law cases resolve through negotiation without going to trial.
Under Cal. Civ. Code § 1793.22, four or more repair attempts for the same non-safety defect, or two attempts for a safety-related defect, triggers the lemon law presumption. Additionally, 30 or more cumulative days out of service qualifies regardless of the number of repair attempts.
Yes. Under Cal. Civ. Code § 1794(d), Toyota is required to pay your reasonable attorney’s fees and court costs if you prevail in a lemon law claim. This means qualified lemon law representation is free to you if your case succeeds.
Yes. A recall is not required to file a lemon law claim. The Song-Beverly Act covers any substantial defect that impairs the use, value, or safety of the vehicle that the manufacturer cannot repair after a reasonable number of attempts. NHTSA complaints support the claim by establishing a pattern, but are not a prerequisite.
California lemon law claims are generally subject to a four-year statute of limitations from the date you discovered or should have discovered the defect. However, you must still be within the manufacturer’s original warranty period when the defect first appears. Contact an attorney promptly to preserve your rights.
If your 2021 Toyota Prius has a recurring defect, California’s Lemon Law may entitle you to a full refund, replacement vehicle, or cash settlement — at no cost to you.
Our attorneys answer the questions we hear most from California vehicle owners — fully updated for 2026.
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