State lemon law · checked October 23, 2026

Missouri lemon law

Verified against the statute / official state publicationMo. Rev. Stat. §§407.560–407.579

The short version

Written notice to the manufacturer is part of the presumption itself — dealer visits alone don't start it.
30 WORKING days, not calendar days.
The suit deadline is 6 months after the warranty ends or 18 months after delivery.

The presumption — Missouri's numbers

Presumption window	The window is the earlier of the warranty term or 1 year after delivery.
Same defect	4+ repair attempts
Days out of service	30+ business days — 30 or more WORKING days out of service.

The presumption is the set of numbers that shifts the burden to the manufacturer. A claim can exist outside the presumption — it is a shortcut, not the whole road. Read why.

The buyback — Missouri's formula

Missouri allows a reasonable allowance for the consumer's use (§407.567) with no published formula. This checker refuses to invent the number.

Notice and procedure

Direct written notice to the manufacturer and an opportunity to cure are elements of the Missouri presumption (§407.563). After you deliver the vehicle to the designated facility, the manufacturer has 10 calendar days to conform it.

Dispute route: If the manufacturer maintains a Part 703-compliant procedure, you may be required to complete it before the refund/replacement remedy.

Attorney's fees: A consumer who complies with the statute and finally prevails may recover costs, expenses, and reasonable attorney's fees.

Your deadline

Any action must be commenced within 6 months after the express warranty expires, or 18 months after original delivery — the earlier framework in §407.573.

Who and what is covered

New vehicles	Covered
Leased vehicles	Not covered
Used vehicles	Not covered
Motorcycles	Not covered
RV / motor home	Covered — chassis / powertrain only

Motorcycles and mopeds are excluded in Missouri.
Leased vehicles are not covered unless acquired through a lease-purchase agreement.
Recreational vehicles are covered only as to chassis, engine, powertrain, and component parts.

Included in the $39 Lemon Verdict Pack

Your repair-log tracker, the Missouri notice letter, the buyback worksheet on Missouri's formula, and your deadline calendar.

See the Lemon Verdict Pack

Sources

Mo. Rev. Stat. §407.571 (presumption)
Mo. Rev. Stat. §407.563 (notice element)
Mo. Rev. Stat. §407.567 (refund)

Checked October 23, 2026. Laws change; if your claim is close to a line, verify the current statute or ask a lawyer in Missouri. This page is information, not legal advice.