Mileage Offset Under California's Lemon Law

The mileage offset is the only meaningful deduction the manufacturer can take from a Song-Beverly buyback. It accounts for the buyer’s use of the vehicle before the defect emerged. The formula is straightforward — but manufacturers regularly apply it incorrectly, costing buyers thousands of dollars when no one catches it.

The statutory formula

California Civil Code § 1793.2(d)(2)(C) defines the mileage offset as:

(Miles driven before the first repair attempt ÷ 120,000) × Purchase price

Three things to notice:

1. The denominator is 120,000 miles, fixed by statute. It doesn’t vary by manufacturer or vehicle.
2. The numerator is miles driven before the first repair attempt — not miles at the time of settlement.
3. The multiplier is the purchase price, not the loan amount or trade-in value.

A worked example

You bought a $40,000 vehicle. You drove it 3,000 miles before the first warranty repair visit. By the time the case settles, the odometer reads 28,000.

Correct offset:

(3,000 ÷ 120,000) × $40,000 = $1,000

Incorrect offset (what manufacturers sometimes apply):

(28,000 ÷ 120,000) × $40,000 = $9,333

The difference — $8,333 — is exactly the kind of overdeduction that happens when buyers don’t push back. Read your buyback math carefully and verify the offset uses the first repair attempt mileage, not the settlement mileage.

What counts as the “first repair attempt”

The first repair attempt is the first time you took the vehicle to an authorized dealer for service on the defect at issue. Specifically:

• It includes “no problem found” visits. If the dealer logged the visit but didn’t perform repairs, it still counts as a repair attempt under § 1793.22 — and the mileage at that visit is the cutoff for the offset.
• It includes pre-warranty service visits only if they relate to the defect. A regular oil change is not a repair attempt for offset purposes.
• It must be at an authorized dealer, not an independent mechanic.

The repair order from that first visit is the proof. Pull it and check the “miles in” line.

What if the first repair attempt mileage is disputed?

Manufacturers sometimes dispute which visit counted as the “first repair attempt.” Common arguments:

• “The first visit was diagnostic, not a repair attempt.” Wrong — a diagnostic visit where the defect is presented to the dealer counts under § 1793.22.
• “The early visits were for unrelated maintenance.” This can be a legitimate argument if the early visits truly weren’t related to the lemon defect.
• “The customer caused the issue.” If the manufacturer argues owner-caused damage, the first “real” repair attempt may be argued to be later.

Your attorney will document the timeline and resist artificially inflating the cutoff mileage.

The 120,000-mile denominator

The choice of 120,000 as the denominator is intentional and consumer-friendly. Most vehicles have an expected useful life of 200,000+ miles, so using 120,000 effectively assumes the buyer would have used the vehicle for 120,000 miles total — a conservative-to-buyer assumption.

The denominator does not vary by vehicle class. It’s the same for a Honda Civic, a Ford F-150, and a Bentley Continental.

Maximum offset

In theory, the offset is capped at the purchase price. The fraction (miles ÷ 120,000) cannot exceed 1, so the maximum offset is the full purchase price. In practice, no realistic Song-Beverly case involves 120,000+ miles before the first repair attempt — by the time a vehicle has been driven that far, the original warranty has typically expired.

Why this matters more than buyers think

For low-mileage cases — particularly EVs that develop battery problems early, or new cars with transmission issues from delivery — the mileage offset can be tiny. We’ve seen Song-Beverly buybacks with offsets under $1,000, which preserves nearly the full purchase price for the buyer.

For higher-mileage cases (defect emerging at 30,000+ miles), the offset can take a meaningful bite. But it’s still bounded by the first-attempt mileage, not the current mileage. Many buyers continue driving the vehicle for years while the case is pending — that additional driving does not increase the offset.

What manufacturers might also try

Beyond inflating the offset mileage, manufacturers have been known to:

• Apply the offset to the loan amount rather than the purchase price. The statute says purchase price.
• Apply the offset to the buyback total including taxes rather than just the vehicle price. The statute says purchase price.
• Argue that negotiated discounts should reduce the “purchase price” baseline. They generally shouldn’t — the price you paid is the price you paid.

Read the proposed offset calculation carefully. The math is simple enough to verify on the back of an envelope, and any departure from the § 1793.2(d)(2)(C) formula is negotiable.

Bottom line

The mileage offset is the one place manufacturers can legitimately reduce a Song-Beverly buyback. But it’s a narrow, formulaic reduction tied to first-attempt mileage and the purchase price. Anything more than that is negotiable — or wrong.

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