Colorado Lemon Law (CO)

Colorado's Lemon Law Changed in 2024 — Which Rules Apply to You?

Colorado overhauled its lemon law with SB 24-192, which took effect August 7, 2024. The date your vehicle was sold or leased decides which version applies to you — and the differences are substantial:

A "safety-based nonconformity" is a defect likely to cause death or serious bodily injury if the vehicle is driven, or one that creates a risk of fire or explosion (§ 42-10-101(2.5)). Brake failures, steering loss, and battery fires are the classic examples — for those, two failed repair attempts are enough.

Which Vehicles Are Covered in Colorado

• Covered: new self-propelled private passenger vehicles — including pickup trucks and vans — designed for highway use and carrying up to ten people, sold to a Colorado consumer for personal, family, or household use. Since 2024, that includes vehicles a small business uses for both business and personal purposes.
• Not covered: motor homes, vehicles with three or fewer wheels (motorcycles and trikes), vehicles modified for commercial use, and used vehicles. Unlike some states, Colorado has no gross-vehicle-weight cutoff — the ten-person capacity rule is the limit.
• Gray area — leases: the 2024 act says it applies to vehicles "sold or leased" and its refund formula mentions lessee costs, but other definitions in the statute still speak in terms of purchase. If you lease, don't assume you're excluded — this is a point worth a consultation.

The Certified-Mail Notice: The Step Most Colorado Claims Miss

Colorado's presumption that your car is a lemon does not apply unless you first send the manufacturer (not just the dealer) written notice by certified mail stating that repair attempts have been made and the defect remains — and then give the manufacturer ten business days to cure after it receives the notice (§ 42-10-103(2)(c)). That cure attempt counts as one of the repair attempts. Your dealer is required to include a notification form with the manufacturer's address in your owner's manual packet.

1. Report the defect to an authorized dealer within the first 24,000 miles / 2 years and keep every repair order — dates, mileage in and out, and the defect description matter.
2. After 2–3 failed attempts (or as downtime accumulates), send the certified-mail notice to the manufacturer and keep the receipt.
3. Allow the 10-business-day cure window and one final repair attempt.
4. If the manufacturer runs an FTC-compliant dispute program (many use BBB AUTO LINE, free to consumers at 1-800-955-5100), you must use it before you can demand the refund/replacement remedy in court.
5. If arbitration doesn't resolve it, file suit within 30 months of delivery — the clock pauses while you're in arbitration and while the car is down for repair.

What a Colorado Refund Actually Looks Like

If your vehicle qualifies, the manufacturer chooses between replacing it with a comparable vehicle or repurchasing it. A repurchase is the full purchase price plus sales tax, license, registration, and similar government fees, minus a use allowance set by statute:

use allowance = contract price × (miles driven before the first repair visit for the defect) ÷ 100,000

Example: you paid $40,000 and first brought the car in for the defect at 8,000 miles. The deduction is $40,000 × 8,000 ÷ 100,000 = $3,200, so the buyback is roughly $36,800 plus the taxes and fees you paid. Miles driven while the car sat in the shop don't count against you. Any auto loan is paid to the lender first, with the balance to you.

If the case goes to court, Colorado directs the judge to award reasonable attorney fees to the prevailing side — a genuine two-way fee shift. Manufacturers also have statutory defenses: no remedy is owed if the defect doesn't substantially impair the vehicle's use and market value or safety, or if it was caused by abuse, neglect, or unauthorized modification.

Used Cars, Private Sales, and Lemon Buybacks

Colorado's lemon law does not cover used vehicles or private-party sales (§ 42-10-110). A private sale in Colorado is generally as-is unless the seller made written promises. But you still have options:

• Buying a former lemon from a dealer: since August 2024, a dealer selling a repurchased "lemon law buyback" must disclose that history in writing before sale and either let you have the vehicle independently inspected or give you a 7-day return window. Buybacks get a door-jamb decal, and starting in 2027 a branded title. If a seller hid buyback status, report it to the Colorado Attorney General.
• Used car with a written warranty: repeated failed warranty repairs may support a claim under the federal Magnuson-Moss Warranty Act, which also allows fee recovery.
• Deceptive sale practices (odometer tampering, undisclosed salvage history): file a complaint with the AG's consumer protection section at coag.gov/file-complaint or call 1-800-222-4444.

Sources

• Colo. Rev. Stat. Title 42, Article 10 (Motor Vehicle Warranties) — official statute text
• SB 24-192 (2024) — bill page, Colorado General Assembly
• Colorado Attorney General — Public Advisory on the updated Lemon Law (Aug 2024)
• BBB AUTO LINE — Colorado lemon law program page

Statutes and agency guidance last reviewed July 2026.