Mazda 3 engine computer price snapshot
- Low
- $15
- Average
- $140
- High
- $580
Vehicle-specific price guide
How much is a used Mazda 3 engine computer ?
How much does a used Mazda 3 engine computer cost? Current salvage yard asking prices with condition grade, trim, and model-year detail from real marketplace listings.
Price summary
A used Mazda 3 engine computer costs $15 to $580, with a median asking price of $119. Based on 1,856 priced salvage yard listings across the US, compatible across 2014–2025 (12 model years), updated Sep 10, 2026. Prices exclude shipping, core charges, and installation.
Grade A (excellent)$121
Grade B (good)$152
Grade C (fair)$125
USD
Condition comparison
Price by part grade
Grade AClean / low wear$25–$5801,474 listings
Grade BStandard used$35–$465228 listings
Grade CVisible wear$99–$1252 listings
Grade XUngraded$15–$250152 listings
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $25–$580 | 1,474 | |
| Grade BStandard used | $35–$465 | 228 | |
| Grade CVisible wear | $99–$125 | 2 | |
| Grade XUngraded | $15–$250 | 152 |
Median by grade
Grade price comparison
Grade A$121
Grade B$152
Grade C$125
Ungraded$80
Median asking price by seller-reported condition grade · $15–$580 overall range
Replacement cost
What is the Mazda 3 engine computer replacement cost?
- Used part
- $119
- Mazda 3 median asking price
- Labor
- $95–$450
- 1–3 hours at $95–$150/hr
- Estimated total
- $215–$570
- 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
Model-year comparison
What does a Mazda 3 engine computer cost by year?
202594 listings$188$90 – $3552024660 listingsFits 4 years$179$45 – $4322023145 listingsFits 6 years$100$25 – $331202250 listingsFits 2 years$247$120 – $5802021145 listingsFits 6 years$96$25 – $331202060 listingsFits 5 years$170$49 – $255201949 listingsFits 5 years$107$25 – $3312018568 listingsFits 3 years$86$15 – $465201650 listingsFits 3 years$150$80 – $4652015317 listingsFits 4 years$99$15 – $395
Market analysis
How much does a used Mazda 3 engine computer cost?
Based on 1,856 listings, a used engine computer for the Mazda 3 runs $119 at the median, ranging $15–$580. That figure comes from 1,856 priced salvage-yard listings tracked by our index.
Fitment variant moves the price more than most buyers expect. The most affordable variant we track, Electronic Control Module, 3.0L, lists at a $135 median, while Electronic Control Module, 3.6L commands $188, a 39% gap inside the same part category. Confirm which variant your VIN requires before comparing quotes.
Model year matters too: 2018 units carry the lowest median at $86, while 2022 tops the table at $247. Parts from 2016–2018 are interchangeable, so if the 2018 fits your vehicle, it offers the best value across 3 compatible years.
Against comparable vehicles, the Mazda 3 sits 8% above the Honda Accord ($110), 18% below the Hyundai Elantra ($146), and 5% below the Honda Civic ($125) for the same part. The “similar vehicles” cards below open each comparison guide.
Buying a used engine computer: what to check
- Ask for the donor vehicle's mileage. Lower-mileage parts carry more remaining life and resale value.
- Confirm the warranty. Many salvage yards offer 30–90 day guarantees; some sell extended coverage.
- Verify fitment against your VIN or the part number on your old unit, not just year and model.
- Ask whether shipping and any core charge are included in the quoted price.
Keep browsing this vehicle
What other Mazda 3 parts are priced?
01wide ±193%
Engine
$1,206median
$2$4,650
02wide ±438%
Transmission
$633median
$75$5,625
03wide ±140%
Front Bumper
$253median
$15$724
04wide ±102%
Rear Bumper
$255median
$30$551
05wide ±81%
Hood
$400median
$70$719
06wide ±134%
Fender
$175median
$32$500
07wide ±125%
Headlight Assembly
$916median
$33$2,325
08wide ±191%
Tail Light
$210median
$20$821
09wide ±344%
Alternator
$86median
$22$614
10wide ±264%
Starter
$71median
$10$385
11wide ±441%
Radiator
$200median
$50$1,814
12wide ±118%
AC Compressor
$146median
$42$387
13wide ±113%
Transfer Case
$312median
$75$783
14wide ±198%
Axle Shaft
$100median
$29$424
15wide ±162%
Strut
$100median
$30$354
16wide ±375%
Steering Rack
$215median
$40$1,652
17wide ±146%
Grille
$235median
$14$700
18wide ±185%
Side Mirror
$152median
$30$593
19wide ±206%
Turbocharger
$398median
$160$1,796
20wide ±350%
AC Condenser
$158median
$45$1,150
21wide ±131%
Wheels
$190median
$45$544
22wide ±693%
Fuel Pump
$110median
$25$1,549
23wide ±189%
Water Pump
$106median
$25$426
24wide ±151%
Power Steering Pump
$136median
$35$445
25wide ±235%
ABS Module
$150median
$40$745
26
Differential
Price data updating
27wide ±273%
Throttle Body
$96median
$25$550
28wide ±313%
Brake Caliper
$75median
$14$484
29wide ±107%
Drive Shaft
$225median
$76$559
30wide ±207%
Tailgate
$522median
$40$2,200
31wide ±105%
Intake Manifold
$159median
$60$395
32wide ±140%
Control Arm
$110median
$36$343
33wide ±195%
Blower Motor
$76median
$35$331
34wide ±297%
Exhaust Manifold
$325median
$65$1,995
35wide ±238%
Transmission Control Module
$101median
$20$500
36wide ±318%
Steering Column
$146median
$40$969
37wide ±132%
Fuel Tank
$150median
$50$447
38wide ±130%
Window Regulator
$99median
$22$280
39
Instrument Cluster
Price data updating
40wide ±94%
Torque Converter
$400median
$90$844
41wide ±111%
Steering Wheel
$180median
$40$440
42wide ±294%
Ignition Switch
$78median
$22$480
43wide ±255%
Car Radio
$125median
$25$662
44wide ±188%
Heater Core
$116median
$50$485
45wide ±203%
Rear View Mirror
$103median
$25$444
46wide ±173%
Sunroof
$237median
$61$880
47wide ±252%
Master Cylinder
$76median
$22$405
48wide ±164%
Fog Light
$75median
$29$275
49wide ±199%
Center Console
$106median
$23$445
50wide ±216%
Air Bag
$155median
$30$700
51wide ±69%
Door Assembly
$830median
$50$1,192
52wide ±93%
Quarter Panel
$400median
$150$895
53wide ±99%
Rear Bumper Assembly
$466median
$21$941
54wide ±145%
Front Seat
$148median
$49$478
Price comparisons
Compare Mazda 3 engine computer prices
Engine Computercompare
HondaAccordvsMazda3
Accord$110
3$119
$9 diff8,365 listings
Engine ComputercompareHyundaiElantravsMazda3
Elantra$146
3$119
$27 diff7,060 listings
Engine ComputercompareHondaCivicvsMazda3
Civic$125
3$119
$6 diff6,470 listings
Engine ComputercompareKiaSoulvsMazda3
Soul$136
3$119
$17 diff5,290 listings
Engine ComputercompareToyotaCorollavsMazda3
Corolla$141
3$119
$22 diff4,932 listings
Engine ComputercompareKiaFortevsMazda3
Forte$150
3$119
$31 diff4,581 listings
Compare fitments
What do similar vehicles charge for this part?
Acurawide ±440%
Acura MDX
$125median
$30$1,129
Acurawide ±225%
Acura RDX
$167median
$23$775
BMWwide ±275%
BMW X3
$211median
$40$1,200
BMWwide ±214%
BMW X5
$271median
$40$1,200
Chevywide ±888%
Chevy Colorado
$100median
$25$1,800
Chevywide ±169%
Chevy Equinox
$94median
$25$343
Chevywide ±144%
Chevy Malibu
$99median
$20$306
Chevywide ±130%
Chevy Silverado 1500
$160median
$40$457
Chevywide ±137%
Chevy Suburban
$135median
$40$410
Chevywide ±136%
Chevy Tahoe
$140median
$20$400
Chevywide ±197%
Chevy Traverse
$85median
$50$385
Mazdawide ±249%
Mazda CX5
$107median
$10$543
Common questions
Mazda 3 engine computer FAQ
How much is a used engine computer for a Mazda 3?
Based on 1,856 priced salvage yard listings, a used Mazda 3 engine computer lists between $15 and $580, with a median asking price of $119.
How much does it cost to replace a Mazda 3 engine computer?
Using a used part, a Mazda 3 engine computer replacement typically runs $215–$570 all-in: the median used engine computer for this model lists at $119, 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.
What affects the price of a used Mazda 3 engine computer?
Condition grade, mileage, model year, and fitment variant all move the price. Our data covers 2 distinct trims/variants for this part. Check the variant table above, since interchange differences can change the price substantially. Always confirm fitment against your VIN or part number before buying.
Which Mazda 3 model years does this price guide cover?
This guide currently has year-level pricing for 2025, 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2016, 2015. Other model years contribute to the overall range where sellers listed them without a year breakdown.
Which Mazda 3 engine computer years are interchangeable?
Based on salvage-yard interchange data, Mazda 3 engine computer listings appear across model years 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, suggesting these years share compatible fitments. Shopping across all 12 years may surface better prices or grades. Always verify the exact part number and VIN before buying — interchange compatibility can vary by trim or drivetrain.
How much is a used Mazda 3 ecu?
A ecu is another name for a engine computer. The Mazda 3 engine computer prices on this page apply — median $119, from 1,856 salvage yard listings.