2021 Acura ILX engine computer — Electronic Control Module, (Acura Watch Plus), ID 37820R4HC42 price snapshot
- Low
- $45
- Average
- $148
- High
- $490
Year & trim-specific price guide
Used 2021 Acura ILX Engine Computer — Electronic Control Module, (Acura Watch Plus), ID 37820R4HC42 prices
Trim-specific pricing for the Electronic Control Module, (Acura Watch Plus), ID 37820R4HC42 variant of the 2021 Acura ILX engine computer, built from 43 real salvage yard listings with condition grade detail.
SKWritten bySaurabh Kumar · Co-Founder & CTO
SK
Saurabh Kumar
Co-Founder & CTO, Part Price Guide
Built the pricing pipeline that collects and normalizes used OEM part listings from salvage yards and online marketplaces across the US.
ASReviewed byAmbika Sharma · Co-Founder & COO
Last updatedOct 15, 2026AS
Ambika Sharma
Co-Founder & COO, Part Price Guide
12 years of project management and technical operations experience. Reviews price guides for sample size, fitment accuracy, and data freshness.
Price summary
A used 2021 Acura ILX engine computer (Electronic Control Module, (Acura Watch Plus), ID 37820R4HC42) costs $45 to $490, with a median asking price of $131. Based on 43 priced salvage yard listings across the US, updated Oct 15, 2026. Prices exclude shipping, core charges, and installation.
Grade A (excellent)$131
Grade B (good)$134
USD
Condition comparison
Price by part grade
Grade AClean / low wear$45–$49032 listings
Grade BStandard used$50–$1468 listings
Grade XUngraded$74–$1013 listings
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $45–$490 | 32 | |
| Grade BStandard used | $50–$146 | 8 | |
| Grade XUngraded | $74–$101 | 3 |
Median by grade
Grade price comparison
Grade A$131
Grade B$134
Ungraded$75
Median asking price by seller-reported condition grade · $45–$490 overall range
Trim-specific context
How does the Electronic Control Module, (Acura Watch Plus), ID 37820R4HC42 compare?
This pricing covers the Electronic Control Module, (Acura Watch Plus), ID 37820R4HC42 variant of the 2021 Acura ILX engine computer, based on 43 priced listings. Its $131 median is 10% below the 2021 Acura ILX engine computer overall median of $146.
There is 1 other engine computer variant available for the 2021 Acura ILX.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Same trim, other years
Electronic Control Module, (Acura Watch Plus), ID 37820R4HC42 in other model years
Same year, other trims
What other 2021 Acura ILX engine computer variants are available?
Back to full guide
2021 Acura ILX engine computer — all trims
Common questions
2021 Acura ILX engine computer (Electronic Control Module, (Acura Watch Plus), ID 37820R4HC42) FAQ
How much is a used 2021 Acura ILX engine computer (Electronic Control Module, (Acura Watch Plus), ID 37820R4HC42)?
Based on 43 priced salvage-yard listings, a used 2021 Acura ILX engine computer in the Electronic Control Module, (Acura Watch Plus), ID 37820R4HC42 variant lists between $45 and $490, with a median asking price of $131.
Which years use the Electronic Control Module, (Acura Watch Plus), ID 37820R4HC42 engine computer?
The Electronic Control Module, (Acura Watch Plus), ID 37820R4HC42 variant appears in model years 2021, 2022. Prices and availability may differ by year.