2018 Mazda 3 engine computer price snapshot
- Low
- $15
- Average
- $100
- High
- $465
Year-specific price guide
Used 2018 Mazda 3 Engine Computer prices
Year-specific used engine computer pricing for the 2018 Mazda 3, built from real salvage yard and junkyard listings with condition grade and fitment detail.
Price summary
A used 2018 Mazda 3 engine computer costs $15 to $465, with a median asking price of $86. Based on 493 priced salvage yard listings across the US, compatible across 2016–2018 (3 model years), updated Aug 30, 2026. Prices exclude shipping, core charges, and installation.
Grade A (excellent)$96
Grade B (good)$109
USD
Condition comparison
Price by part grade
Grade AClean / low wear$25–$394400 listings
Grade BStandard used$35–$46523 listings
Grade CVisible wearUpdating
Grade XUngraded$15–$15070 listings
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $25–$394 | 400 | |
| Grade BStandard used | $35–$465 | 23 | |
| Grade CVisible wear | Updating | — | |
| Grade XUngraded | $15–$150 | 70 |
Median by grade
Grade price comparison
Grade A$96
Grade B$109
Ungraded$75
Median asking price by seller-reported condition grade · $15–$465 overall range
Replacement cost
What is the 2018 Mazda 3 engine computer replacement cost?
- Used part
- $86
- 2018 Mazda 3 median asking price
- Labor
- $95–$450
- 1–3 hours at $95–$150/hr
- Estimated total
- $180–$535
- median used part + labor
Labor is a typical independent-shop range for engine computer replacement, not a quote for your vehicle; it does not include programming and key relearn procedure. The part price is the live median from the salvage-yard listings on this page. Full engine computer replacement cost breakdown
Fitment matters
Price by trim & variant
Year-specific context
How does the 2018 Mazda 3 compare?
The 2018 guide is based on 568 observed listings, including 493 with posted prices. Its $86 median is 28% below the Mazda 3 guide's $119 median.
Among the 10 model years with current price data, 2018 ranks #1 from lowest to highest median.
Interchange data shows this part is also listed under model years 2016, 2017. Shopping across all 3 compatible years may surface better prices or condition grades.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Compare model years
What does a Mazda 3 engine computer cost in other years?
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Common questions
2018 Mazda 3 engine computer FAQ
How much is a used 2018 Mazda 3 engine computer?
Based on 493 priced salvage-yard listings, a used 2018 Mazda 3 engine computer lists between $15 and $465, with a median asking price of $86.
How much does it cost to replace a 2018 Mazda 3 engine computer?
Using a used part, a 2018 Mazda 3 engine computer replacement typically runs $180–$535 all-in: the median used engine computer for this year lists at $86, and independent-shop labor for engine computer replacement typically takes 1–3 hours at $95–$150/hr ($95–$450). The labor figure does not include programming and key relearn procedure. Labor is a national part-level estimate, not a quote for your vehicle.
Will a 2018 Mazda 3 engine computer fit another year?
Based on salvage-yard interchange data, listings for the 2018 Mazda 3 engine computer also appear under model years 2016, 2017, suggesting these years share compatible fitments. Always verify the exact part number, drivetrain, trim, and your VIN before buying — interchange compatibility can vary by variant.
How much is a 2018 Mazda 3 ecu?
A ecu is another name for a engine computer. The prices on this page cover the 2018 Mazda 3 engine computer — median $86, from 493 listings.