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Mazda Demio Smart Key & Remote Battery by Chassis Code
Which battery is used in the documented key system? Compare actual published manufacturer references for 4 exact Mazda Demio chassis codes. Values can differ across drivetrain, trim and production period.
4documented chassis
1answer shared by every code
1source documents
2026-10-05latest evidence review
Before applying a specification
View all Mazda Demio chassis →Confirm the engineering configuration
Different key or remote variants may ship with different coin cells even within the same model family. Match the actual fob, not just the vehicle name.
Year ranges here describe the cited chassis coverage, not every option sold under the same model name worldwide. The actual service manual and fitted equipment take precedence.
Source-linked answers
Smart Key & Remote Battery: chassis comparison
Open the original exact-code answer to see the manufacturer reference and full caveat.
| Exact code | Documented years | Key battery reference | Manufacturer source |
|---|---|---|---|
| DJ5AS | 2018–2019 | CR2025 ↗ | Mazda Motor Corporation ↗Checked 2026-10-05 |
| DJ5FS | 2018–2019 | CR2025 ↗ | Mazda Motor Corporation ↗Checked 2026-10-05 |
| DJLAS | 2018–2019 | CR2025 ↗ | Mazda Motor Corporation ↗Checked 2026-10-05 |
| DJLFS | 2018–2019 | CR2025 ↗ | Mazda Motor Corporation ↗Checked 2026-10-05 |
Documented differences
Which codes share an answer?
Grouped by exact published text. Similar wording is not treated as proof of identical equipment.
Reviewable evidence
Source scope and important caveats
Mazda Demio DJ5AS — Key fob battery ↗
Published answer: CR2025
Mazda’s Demio DJ electronic owner manual specifies a CR2025 lithium coin cell for the key.
Applicability: Use the replacement procedure for the matching DJ-generation key.
Mazda Demio DJ Owner Manual — Key Battery · Mazda Motor Corporation · Manufacturer reference ↗
Mazda Demio DJ5FS — Key fob battery ↗
Published answer: CR2025
Mazda’s Demio DJ electronic owner manual specifies a CR2025 lithium coin cell for the key.
Applicability: Use the replacement procedure for the matching DJ-generation key.
Mazda Demio DJ Owner Manual — Key Battery · Mazda Motor Corporation · Manufacturer reference ↗
Mazda Demio DJLAS — Key fob battery ↗
Published answer: CR2025
Mazda’s Demio DJ electronic owner manual specifies a CR2025 lithium coin cell for the key.
Applicability: Use the replacement procedure for the matching DJ-generation key.
Mazda Demio DJ Owner Manual — Key Battery · Mazda Motor Corporation · Manufacturer reference ↗
Mazda Demio DJLFS — Key fob battery ↗
Published answer: CR2025
Mazda’s Demio DJ electronic owner manual specifies a CR2025 lithium coin cell for the key.
Applicability: Use the replacement procedure for the matching DJ-generation key.
Mazda Demio DJ Owner Manual — Key Battery · Mazda Motor Corporation · Manufacturer reference ↗