2018 Ram 3500 engine computer — Electronic Control Module, 6.4L (gasoline, RH rear engine compartment), 66RFE (transmission) price snapshot
- Low
- $115
- Average
- $208
- High
- $322
Year & trim-specific price guide
Used 2018 Ram 3500 Engine Computer — Electronic Control Module, 6.4L (gasoline, RH rear engine compartment), 66RFE (transmission) prices
Trim-specific pricing for the Electronic Control Module, 6.4L (gasoline, RH rear engine compartment), 66RFE (transmission) variant of the 2018 Ram 3500 engine computer, built from 48 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 12, 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 2018 Ram 3500 engine computer (Electronic Control Module, 6.4L (gasoline, RH rear engine compartment), 66RFE (transmission)) costs $115 to $322, with a median asking price of $222. Based on 48 priced salvage yard listings across the US, updated Oct 12, 2026. Prices exclude shipping, core charges, and installation.
Grade A (excellent)$224
Grade B (good)$228
Grade C (fair)$145
USD
Condition comparison
Price by part grade
Grade AClean / low wear$115–$32219 listings
Grade BStandard used$125–$28824 listings
Grade CVisible wear$145–$1451 listings
Grade XUngraded$136–$1554 listings
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $115–$322 | 19 | |
| Grade BStandard used | $125–$288 | 24 | |
| Grade CVisible wear | $145–$145 | 1 | |
| Grade XUngraded | $136–$155 | 4 |
Median by grade
Grade price comparison
Grade A$224
Grade B$228
Grade C$145
Ungraded$150
Median asking price by seller-reported condition grade · $115–$322 overall range
Trim-specific context
How does the Electronic Control Module, 6.4L (gasoline, RH rear engine compartment), 66RFE (transmission) compare?
This pricing covers the Electronic Control Module, 6.4L (gasoline, RH rear engine compartment), 66RFE (transmission) variant of the 2018 Ram 3500 engine computer, based on 48 priced listings. Its $222 median is 1% below the 2018 Ram 3500 engine computer overall median of $225.
There are 4 other engine computer variants available for the 2018 Ram 3500.
Pricing is not a fitment guarantee. Match the VIN, part number, engine or drivetrain, and seller-listed variant before ordering.
Same year, other trims
What other 2018 Ram 3500 engine computer variants are available?
Electronic Control Module, 6.7L (diesel, LH side of block)
50 listings$454$237 – $628Emission Control, (6.7L, diesel), (DEF pump module), (mounted on top of urea tank)
49 listings$138$45 – $501Electronic Control Module, 5.7L (gasoline, RH rear engine compartment)
39 listings$200$130 – $325Electronic Control Module, 6.4L (gasoline, RH rear engine compartment), AS66RC (transmission)
5 listings$350$350 – $569Back to full guide
2018 Ram 3500 engine computer — all trims
Common questions
2018 Ram 3500 engine computer (Electronic Control Module, 6.4L (gasoline, RH rear engine compartment), 66RFE (transmission)) FAQ
How much is a used 2018 Ram 3500 engine computer (Electronic Control Module, 6.4L (gasoline, RH rear engine compartment), 66RFE (transmission))?
Based on 48 priced salvage-yard listings, a used 2018 Ram 3500 engine computer in the Electronic Control Module, 6.4L (gasoline, RH rear engine compartment), 66RFE (transmission) variant lists between $115 and $322, with a median asking price of $222.
Which years use the Electronic Control Module, 6.4L (gasoline, RH rear engine compartment), 66RFE (transmission) engine computer?
In our current dataset, the Electronic Control Module, 6.4L (gasoline, RH rear engine compartment), 66RFE (transmission) variant appears only for the 2018 model year.