2018 Mazda 3 engine computer — (mounted by battery), 2.5L, MT, ID PY9S-18-881 price snapshot
- Low
- $15
- Average
- $116
- High
- $394

Year & trim-specific price guide
A used 2018 Mazda 3 engine computer ((mounted by battery), 2.5L, MT, ID PY9S-18-881) costs $15 to $394, with a median asking price of $101. Based on 37 priced salvage yard listings across the US, updated Aug 30, 2026. Prices exclude shipping, core charges, and installation.
Condition comparison
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $65–$394 | 29 | |
| Grade BStandard used | $75–$111 | 2 | |
| Grade CVisible wear | Updating | — | |
| Grade XUngraded | $15–$115 | 6 |
Median by grade
Median asking price by seller-reported condition grade · $15–$394 overall range
Trim-specific context
This pricing covers the (mounted by battery), 2.5L, MT, ID PY9S-18-881 variant of the 2018 Mazda 3 engine computer, based on 37 priced listings. Its $101 median is 17% above the 2018 Mazda 3 engine computer overall median of $86.
There are 11 other engine computer variants available for the 2018 Mazda 3.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Same year, other trims
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Common questions
Based on 37 priced salvage-yard listings, a used 2018 Mazda 3 engine computer in the (mounted by battery), 2.5L, MT, ID PY9S-18-881 variant lists between $15 and $394, with a median asking price of $101.
In our current dataset, the (mounted by battery), 2.5L, MT, ID PY9S-18-881 variant appears only for the 2018 model year.