2021 Mazda 3 heater core price snapshot
- Low
- $85
- Average
- $115
- High
- $116
Year-specific price guide
Used 2021 Mazda 3 Heater Core prices
Year-specific used heater core pricing for the 2021 Mazda 3, built from real salvage yard and junkyard listings with condition grade and fitment detail.
Price summary
A used 2021 Mazda 3 heater core costs $85 to $116, with a median asking price of $116. Based on 36 priced salvage yard listings across the US, compatible across 2019–2021 (3 model years), updated Sep 4, 2026. Prices exclude shipping, core charges, and installation.
Grade A (excellent)$116
Grade B (good)$116
USD
Condition comparison
Price by part grade
Grade AClean / low wear$85–$11629 listings
Grade BStandard used$116–$1167 listings
Grade CVisible wearUpdating
Grade XUngradedUpdating
| Grade | Price range | Relative range | Listings |
|---|---|---|---|
| Grade AClean / low wear | $85–$116 | 29 | |
| Grade BStandard used | $116–$116 | 7 | |
| Grade CVisible wear | Updating | — | |
| Grade XUngraded | Updating | — |
Median by grade
Grade price comparison
Grade A$116
Grade B$116
Median asking price by seller-reported condition grade · $85–$116 overall range
Replacement cost
What is the 2021 Mazda 3 heater core replacement cost?
- Used part
- $116
- 2021 Mazda 3 median asking price
- Labor
- $475–$1,500
- 5–10 hours at $95–$150/hr
- Estimated total
- $590–$1,615
- median used part + labor
Labor is a typical independent-shop range for heater core replacement, not a quote for your vehicle; it does not include coolant refill, and dashboard reassembly on vehicles requiring full dash removal. The part price is the live median from the salvage-yard listings on this page. Full heater core replacement cost breakdown
Fitment matters
Price by trim & variant
Year-specific context
How does the 2021 Mazda 3 compare?
The 2021 guide is based on 54 observed listings, including 36 with posted prices. Its $116 median is 0% above the Mazda 3 guide's $116 median.
Among the 10 model years with current price data, 2021 ranks #5 from lowest to highest median.
Interchange data shows this part is also listed under model years 2019, 2020. 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 heater core cost in other years?
Keep browsing this vehicle
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Common questions
2021 Mazda 3 heater core FAQ
How much is a used 2021 Mazda 3 heater core?
Based on 36 priced salvage-yard listings, a used 2021 Mazda 3 heater core lists between $85 and $116, with a median asking price of $116.
How much does it cost to replace a 2021 Mazda 3 heater core?
Using a used part, a 2021 Mazda 3 heater core replacement typically runs $590–$1,615 all-in: the median used heater core for this year lists at $116, and independent-shop labor for heater core replacement typically takes 5–10 hours at $95–$150/hr ($475–$1,500). The labor figure does not include coolant refill, and dashboard reassembly on vehicles requiring full dash removal. Labor is a national part-level estimate, not a quote for your vehicle.
Will a 2021 Mazda 3 heater core fit another year?
Based on salvage-yard interchange data, listings for the 2021 Mazda 3 heater core also appear under model years 2019, 2020, 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.