A well-structured warranty policy does two things: it builds customer confidence and it protects your shop from endless comebacks. Too many shop owners either offer too much (and get burned) or too little (and lose customers to competitors). Here's how to get it right.

The Standard Warranty Tiers

🔧 Labor Only

12 months / 12,000 miles — standard for most mechanical repairs. You warranty your workmanship, not the part. If the part fails outside the parts warranty, that's a parts claim, not your problem.

🔩 Parts + Labor

24 months / 24,000 miles — common for major repairs (engines, transmissions, brakes). Ensures you use quality parts and stand behind the full job.

⚡ Extended

36 months / 36,000 miles — premium offering for complete rebuilds or high-ticket jobs. Charge accordingly. Only offer this on work you're fully confident in.

What Your Warranty Should Always Include

  • Clear mileage and time limits (whichever comes first)
  • Specific exclusions: wear items, maintenance parts, customer-supplied parts
  • Requirement that vehicle returns to YOUR shop for warranty work
  • Exclusions for abuse, accidents, and modifications
  • No coverage for pre-existing conditions unrelated to the repair

⚠️ Never warranty customer-supplied parts. If they bring their own parts, your warranty covers labor only — and make sure that's written on the RO before you start.

Protecting Yourself on the Repair Order

The repair order is your legal document. Every warranty term must be clearly printed on the RO and signed by the customer. Verbal warranties are unenforceable and expose you to unlimited liability.

💡 Comeback Prevention: The best warranty is one you never have to honor. Document everything — photos of the vehicle condition, parts installed, and test drive results. This protects you if a customer claims damage that was pre-existing.

When to Honor a Warranty Claim

Honor legitimate claims quickly and without argument — it costs less than the bad review. Inspect carefully to determine root cause. If the failure is unrelated to your work, explain clearly and professionally. Most customers respect honesty.