2021 Hyundai Elantra engine computer — Electronic Control Module, 2.0L, US built, automatic engine stop and start, ID 391712JBC0 price snapshot
- Low
- $45
- Average
- $169
- High
- $420

Year & trim-specific price guide
A used 2021 Hyundai Elantra engine computer (Electronic Control Module, 2.0L, US built, automatic engine stop and start, ID 391712JBC0) costs $45 to $420, with a median asking price of $161. Based on 14 priced salvage yard listings across the US, updated Aug 26, 2026. Prices exclude shipping, core charges, and installation.
Condition comparison
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $125–$420 | 6 | |
| Grade BStandard used | $131–$171 | 7 | |
| Grade CVisible wear | Updating | — | |
| Grade XUngraded | $45–$45 | 1 |
Median by grade
Median asking price by seller-reported condition grade · $45–$420 overall range
Trim-specific context
This pricing covers the Electronic Control Module, 2.0L, US built, automatic engine stop and start, ID 391712JBC0 variant of the 2021 Hyundai Elantra engine computer, based on 14 priced listings. Its $161 median is 9% above the 2021 Hyundai Elantra engine computer overall median of $148.
There are 16 other engine computer variants available for the 2021 Hyundai Elantra.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Same trim, other years
Same year, other trims
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Common questions
Based on 14 priced salvage-yard listings, a used 2021 Hyundai Elantra engine computer in the Electronic Control Module, 2.0L, US built, automatic engine stop and start, ID 391712JBC0 variant lists between $45 and $420, with a median asking price of $161.
The Electronic Control Module, 2.0L, US built, automatic engine stop and start, ID 391712JBC0 variant appears in model years 2021, 2022. Prices and availability may differ by year.