Manufacturer-backed comparison · Exact vehicle codes

Mitsubishi eK X Smart Key & Remote Battery by Chassis Code

Which battery is used in the documented key system? Compare actual published manufacturer references for 4 exact Mitsubishi eK X chassis codes. Values can differ across drivetrain, trim and production period.

4documented chassis

1answer shared by every code

1source documents

2026-10-23latest evidence review

Before applying a specification

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.

View all Mitsubishi eK X chassis →

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
B34W	2019–2023	CR2032 (keyless operation or keyless entry key; confirm fitted key type) ↗	Mitsubishi Motors Corporation ↗Checked 2026-10-23
B35W	2019–2023	CR2032 (keyless operation or keyless entry key; confirm fitted key type) ↗	Mitsubishi Motors Corporation ↗Checked 2026-10-23
B37W	2019–2023	CR2032 (keyless operation or keyless entry key; confirm fitted key type) ↗	Mitsubishi Motors Corporation ↗Checked 2026-10-23
B38W	2019–2023	CR2032 (keyless operation or keyless entry key; confirm fitted key type) ↗	Mitsubishi Motors Corporation ↗Checked 2026-10-23

Documented differences

Which codes share an answer?

Grouped by exact published text. Similar wording is not treated as proof of identical equipment.

CR2032 (keyless operation or keyless entry key; confirm fitted key type)B34W · B35W · B37W · B38W

Reviewable evidence

Source scope and important caveats

Mitsubishi eK X B34W — Smart-key battery ↗

Published answer: CR2032 (keyless operation or keyless entry key; confirm fitted key type)

Manufacturer key-battery FAQs distinguish keyless operation and keyless entry equipment; both specify CR2032 for the stated applicability.

Applicability: Japan Mitsubishi eK X B34W, BR06 naturally aspirated + SM21 mild hybrid, 2WD, catalog 2019–2023. FAQ10232 expressly includes eK X March 2019 models onward for entry keys; FAQ10174 specifies CR2032 for operation keys on all models. Which key is fitted depends on grade. No high-voltage or 12V battery inference. Source SHA-256 603bf4ef3d0dd94abfbded9902d2d5cf8e6dce05e20cf320e3c835b6f41c291d.

Mitsubishi Motors Corporation manufacturer reference · Mitsubishi Motors Corporation · Manufacturer reference ↗

Mitsubishi eK X B35W — Smart-key battery ↗

Published answer: CR2032 (keyless operation or keyless entry key; confirm fitted key type)

Manufacturer key-battery FAQs distinguish keyless operation and keyless entry equipment; both specify CR2032 for the stated applicability.

Applicability: Japan Mitsubishi eK X B35W, BR06 turbo + SM21 mild hybrid, 2WD, catalog 2019–2023. FAQ10232 expressly includes eK X March 2019 models onward for entry keys; FAQ10174 specifies CR2032 for operation keys on all models. Which key is fitted depends on grade. No high-voltage or 12V battery inference. Source SHA-256 603bf4ef3d0dd94abfbded9902d2d5cf8e6dce05e20cf320e3c835b6f41c291d.

Mitsubishi Motors Corporation manufacturer reference · Mitsubishi Motors Corporation · Manufacturer reference ↗

Mitsubishi eK X B37W — Smart-key battery ↗

Published answer: CR2032 (keyless operation or keyless entry key; confirm fitted key type)

Manufacturer key-battery FAQs distinguish keyless operation and keyless entry equipment; both specify CR2032 for the stated applicability.

Applicability: Japan Mitsubishi eK X B37W, BR06 naturally aspirated + SM21 mild hybrid, 4WD, catalog 2019–2023. FAQ10232 expressly includes eK X March 2019 models onward for entry keys; FAQ10174 specifies CR2032 for operation keys on all models. Which key is fitted depends on grade. No high-voltage or 12V battery inference. Source SHA-256 603bf4ef3d0dd94abfbded9902d2d5cf8e6dce05e20cf320e3c835b6f41c291d.

Mitsubishi Motors Corporation manufacturer reference · Mitsubishi Motors Corporation · Manufacturer reference ↗

Mitsubishi eK X B38W — Smart-key battery ↗

Published answer: CR2032 (keyless operation or keyless entry key; confirm fitted key type)

Manufacturer key-battery FAQs distinguish keyless operation and keyless entry equipment; both specify CR2032 for the stated applicability.

Applicability: Japan Mitsubishi eK X B38W, BR06 turbo + SM21 mild hybrid, 4WD, catalog 2019–2023. FAQ10232 expressly includes eK X March 2019 models onward for entry keys; FAQ10174 specifies CR2032 for operation keys on all models. Which key is fitted depends on grade. No high-voltage or 12V battery inference. Source SHA-256 603bf4ef3d0dd94abfbded9902d2d5cf8e6dce05e20cf320e3c835b6f41c291d.

Mitsubishi Motors Corporation manufacturer reference · Mitsubishi Motors Corporation · Manufacturer reference ↗