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 13 complaints against the 2021 BMW 4 Series. 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 BMW 4 Series complaints directly on the NHTSA complaint database.
The 2021 Bmw 4 Series has generated 52 NHTSA complaints on file with the National Highway Traffic Safety Administration. If your 2021 Bmw 4 Series 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. Bmw pays all attorney fees when we prevail. You pay nothing.
Electrical system failures are notoriously difficult to diagnose and repair, which often results in multiple unsuccessful repair attempts — a key element of a lemon law claim. Reported issues for the 2021 Bmw 4 Series include infotainment malfunctions, battery drain, warning lights, power window failures, and intermittent starting problems. 24 NHTSA complaints have been filed for this category. Owner reports include: “I received a recall notice dated 9/23/2025. The recall is listed as URGENT safety issue that could cause a fire. The notice instructs not to drive the car or park in garage. It has been over 6 months now and there is still no fix. I am requesting the manufacture buyback my vehicle.” (NHTSA Complaint #11724645)
The 2021 Bmw 4 Series has generated 12 NHTSA complaints for this defect category. If your vehicle has experienced recurring issues in this area that the dealer has been unable to repair after multiple attempts, you may have a qualifying lemon law claim under California’s Song-Beverly Consumer Warranty Act. Owner reports include: “The contact owns a 2021 BMW 430I. The contact stated that the front driver’s side seat belt chest strap was shredded. The contact was concerned that the seat belt would not safely secure the driver in a crash. The contact stated that the shredded seat belt strap might have been caused by the seat belt strap touching the seat belt retractor while pulling the seat belt buckle up. The vehicle was taken to the local dealer who indicated that the seat belt needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was13,300.” (NHTSA Complaint #11721698)
Engine and cooling problems are among the most serious defects under California’s Song-Beverly Act. Owners of the 2021 Bmw 4 Series have reported issues including stalling, overheating, loss of power, rough idling, excessive oil consumption, and check engine lights that return after dealer repairs. With 4 NHTSA complaints on record, this defect pattern is well-documented. Owner reports include: “The component that malfunctioned is the engine starter relay, which is subject to an open BMW/NHTSA safety recall (issued September 2025) due to potential corrosion causing overheating, short circuits, and vehicle fire risk. The recall specifically advises parking the vehicle outside and away from structures until repaired. The vehicle is available for inspection upon request.My safety and the safety of my family were put at risk because the dealership (Capitol Nissan in San Jose) failed to disclose this critical fire-risk recall before or during the sale on January 4, 2026, despite it being noted on the provided Carfax report (without any explanation of its severity). I only learned of the fire hazard and “park outside” warning when an authorized BMW dealer informed me during an inspection on January 5, 2026.The recall issue has been confirmed by an authorized BMW dealer on January 5, 2026.The vehicle has been inspected by an authorized BMW dealer, but not yet by the manufacturer, police, or insurance representatives.There were no warning lamps, messages, or other symptoms that I noticed prior to purchase, as the problem is related to a latent defect covered by the recall. The issue was UNKNOWN to me until the BMW dealer informed me after the purchase.In addition, the dealership engaged in other fraudulent practices, including structuring my full cash payment as self-financed (with themselves as both seller and creditor) and adding unauthorized charges, but the primary safety concern prompting this report is the undisclosed fire-risk recall.” (NHTSA Complaint #11709689)
The 2021 Bmw 4 Series has generated 4 NHTSA complaints for this defect category. If your vehicle has experienced recurring issues in this area that the dealer has been unable to repair after multiple attempts, you may have a qualifying lemon law claim under California’s Song-Beverly Consumer Warranty Act. Owner reports include: “Since September 2025 no remedy is available for my vehicle. Due to safety concerns and recall instructions I’ve been unable to drive the car. I’ve called BMW customer service as well as dealer and no resolve.” (NHTSA Complaint #11700127)
Powertrain and transmission defects directly impair the vehicle’s core function and are generally considered substantial defects under California lemon law. Owners of the 2021 Bmw 4 Series have reported harsh shifting, shuddering, slipping, and transmission warning lights. 4 NHTSA complaints have been submitted for this defect category. Owner reports include: “The contact owns a 2021 BMW 430I. The contact stated while stopped at a traffic light, the light turned green; however, when the accelerator pedal was depressed, the vehicle failed to respond as intended. The contact stated that the power train warning light was illuminated. The contact turned off and restarted the vehicle, shifted to drive(D); however, the vehicle failed to respond. The contact had the vehicle towed to a dealer to be diagnosed. The dealer determined that the rear differential oil had leaked out causing the differential to seize. The contact was informed that the rear differential needed to be replaced. The vehicle was not repaired. The manufacturer was informed of the failure. The failure mileage was approximately 33,000.” (NHTSA Complaint #11603683)
As of the date of this review, no active recalls have been issued specifically for the 2021 Bmw 4 Series. 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 Bmw 4 Series:
Once the presumption is triggered, the burden shifts to Bmw to prove the vehicle is not a lemon. Under Cal. Civ. Code § 1794(d), Bmw must pay your attorney’s fees if you prevail — meaning qualified representation costs you nothing out of pocket.
If your 2021 Bmw 4 Series qualifies as a lemon under California law, Bmw 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 Bmw a reasonable opportunity to fix the defect. Visit different authorized Bmw 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), Bmw pays your fees if you win.
Step 4: Send a demand letter. Your attorney will send Bmw 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), Bmw 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 BMW 4 Series 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.
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