Japanese automakers have long been known for building vehicles that go the distance. From efficient sedans to advanced hybrids, their reputation for dependability has earned the trust of millions of drivers.
Still, even the most reliable brands can have challenging years. According to recent reports, several Japanese manufacturers showed increased reliability concerns in 2025.
For California car owners, these trends raise an important question: what happens when a “reliable” car spends more time in the shop than on the road?
This post explores which Japanese brands are struggling the most with dependability and the common complaints they face. It also explains how California’s lemon law can protect consumers with ongoing vehicle problems.
When Reliability Slips: Which Japanese Automakers Are Struggling?
While many Japanese automakers still lead the industry in long-term performance, several brands have faced a noticeable rise in repair complaints. Here’s a closer look at the brands facing the most issues and what drivers are experiencing:
Nissan
Nissan has been making headlines for all the wrong reasons. In 2025, Consumer Reports ranked Nissan last among Japanese automakers for reliability. The company also faced major financial challenges, including significant layoffs and a $4.5 billion loss in the previous fiscal year, according to CBS News. These challenges may have contributed to quality control issues and delayed repairs.
Common driver complaints include:
- Transmission slipping or hesitating between gears
- Excessive noise or vibration during acceleration
- Repeated check engine light warnings related to transmission codes
Despite extended warranties and software updates, many owners say the fixes are temporary—raising questions about long-term durability.
Infiniti
As Nissan’s luxury division, Infiniti has struggled with similar reliability challenges. The two brands share many parts and manufacturing processes, meaning their issues often overlap.
Drivers report frequent electrical malfunctions, infotainment failures, and transmission complaints—especially in QX-series SUVs. Some owners have also mentioned problems with adaptive cruise control and driver-assist systems failing without warning.
These recurring problems not only can affect performance but also may diminish the premium experience Infiniti buyers expect. For a brand positioned as a luxury alternative, these reliability setbacks can be particularly frustrating.
Mitsubishi
Mitsubishi’s reliability troubles have only deepened in recent years. As Reuters reported, the automaker saw a 26% drop in profits this year and has continued to struggle with aging technology and cost-cutting measures.
Drivers have reported issues. including:
- Faulty continuously variable transmissions
- Poor-quality interior components
- Rapid battery degradation in plug-in hybrid models
Mitsubishi’s absence from some 2025 reliability surveys underscores its dwindling presence in the U.S. market. Many California drivers who still own older models have found parts and service harder to come by—a growing frustration for consumers facing ongoing mechanical problems.
Mazda
Once praised for its sporty, driver-friendly vehicles, Mazda has faced increasing reliability concerns tied to infotainment, fuel system, and electrical issues in newer models.
According to Consumer Reports, certain Mazda CX-9 owners have reported seatbelt malfunctions and engine stalling problems. Some drivers also cite excessive oil consumption and premature brake wear in recent-year models.
How California’s Lemon Law Protects Owners of Japanese Vehicles
The California lemon law (Song-Beverly Consumer Warranty Act) protects drivers who purchase or lease a new or certified pre-owned vehicle that develops serious defects during the warranty period. If the manufacturer or dealer cannot repair a covered issue after a “reasonable” number of attempts, the consumer may be entitled to a replacement vehicle or a lemon buyback (refund).
Common problems that may qualify include, but are not limited to:
- Transmission or engine failure
- Electrical or infotainment malfunctions
- Safety system defects (airbags, brakes, steering, etc.)
- Persistent warning lights, stalling, or overheating
What Counts as a “Reasonable” Number of Repairs?
While the California lemon law doesn’t define an exact number, it generally applies when:
- The same issue has been repaired two or more times for a safety defect, or
- Four or more attempts were made for the same defect, or
- The vehicle has been out of service for 30 or more cumulative days due to any warranty repairs.
If these conditions are met and the problems affect the vehicle’s use, value, or safety, the manufacturer is required to make things right.
What to Do If You Think You Have a Lemon Vehicle
If you suspect your car may qualify as a lemon, documentation is key. Follow these steps to protect your rights and strengthen your case:
1. Keep All Service Records
Save every repair order, invoice, and communication with your dealership. These documents show when issues began, how many attempts were made, and whether the problem was fully resolved. Make sure each repair order clearly describes the issue in your own words.
2. Report Problems Promptly
Don’t delay bringing your vehicle in for service. The sooner you report an issue while the warranty is active, the stronger your claim becomes. California courts recognize that delays caused by dealerships or parts shortages shouldn’t penalize consumers—as long as the problem was reported on time.
3. Don’t Accept Endless Repair Attempts
If your authorized repair shop keeps saying “we’ll try another fix” without lasting results, it may be time to take legal action. Repeated temporary fixes for the same issue often signal a lemon law situation.
4. Consult a Lemon Law Attorney
An experienced California lemon law attorney can review your situation at no cost and determine whether you qualify for compensation. They’ll handle all communication with the manufacturer, guide you through the legal process, and help you pursue the best possible outcome—whether that’s a refund, replacement vehicle, or cash settlement.
Final Thoughts
Even the most respected Japanese brands can fall short when it comes to reliability. Transmission failures, electrical glitches, and repeated service visits are more than just inconveniences—they can leave drivers feeling powerless.
If you’ve experienced ongoing issues with your Nissan, Infiniti, Mazda, or Mitsubishi vehicle, you may not have to keep paying for a car that doesn’t perform as promised.
California’s lemon law exists to protect you. Cline APC can help you understand your options, file your claim, and fight for the resolution you deserve. Schedule a free consultation today to find out if your vehicle qualifies under the California lemon law.
