Mazda 3 engine computer — (mounted by battery), Denso manufacturer price snapshot
- Low
- $30
- Average
- $148
- High
- $282

Trim-specific price guide
A used Mazda 3 engine computer ((mounted by battery), Denso manufacturer) costs $30 to $282, with a median asking price of $233. Based on 42 priced salvage yard listings across the US, updated Sep 10, 2026. Prices exclude shipping, core charges, and installation.
Condition comparison
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $30–$282 | 35 | |
| Grade BStandard used | $179–$181 | 2 | |
| Grade CVisible wear | Updating | — | |
| Grade XUngraded | $100–$125 | 5 |
Median by grade
Median asking price by seller-reported condition grade · $30–$282 overall range
Trim-specific context
This pricing covers the (mounted by battery), Denso manufacturer variant of the Mazda 3 engine computer, based on 42 priced listings across 2 model years (2019, 2020). Its $233 median is 96% above the Mazda 3 engine computer overall median of $119.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Price by model year
Other trims
Common questions
Based on 42 priced salvage-yard listings across 2 model years, a used Mazda 3 engine computer in the (mounted by battery), Denso manufacturer variant lists between $30 and $282, with a median asking price of $233.
The (mounted by battery), Denso manufacturer variant appears in model years 2019, 2020. Prices and availability differ by year.
Yes. Grade A has a median of $233, Grade B has a median of $181. Grade A parts are in excellent condition, B is good, and C is fair.