Skip to content
Person reading legal information on a tablet in a car
Frequently Asked QuestionsLemon Law Basics

What is “substantial impairment” under California Lemon Law?

Plain-English Answer

Substantial impairment means a defect that significantly affects the vehicle’s use, value, or safety. Examples courts and manufacturers often recognize include repeated engine or transmission failures, chronic stalling, brake or steering problems, persistent electrical failures that leave the car unreliable, and safety systems that fail intermittently. Cosmetic issues alone usually do not qualify unless they also affect safety or resale value in a meaningful way.

Key Takeaways

  • The defect must meaningfully affect use, value, or safety, not minor annoyances.
  • Safety-related defects can support a claim with fewer repair visits.
  • Document how the problem affects your daily driving and costs.

California Lemon Law Context

This answer is educational, not legal advice. A CLINE APC attorney can review your repair history and warranty records for free.
Person reading legal information on a tablet in a car
CLINE APC, California's Premier Lemon Law Legal Group

Think you're driving a lemon?

Start with a free 60-second eligibility check, or talk to a CLINE APC attorney today. You never pay our fees.

Serving all of CaliforniaYou never pay our fees