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Honda: add fwdRadar FW for 2018 Accord Hybrid - #3663

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michaelmu:agent/honda-accord-radar-a220-fw
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Honda: add fwdRadar FW for 2018 Accord Hybrid#3663
michaelmu wants to merge 1 commit into
commaai:masterfrom
michaelmu:agent/honda-accord-radar-a220-fw

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@michaelmu

@michaelmu michaelmu commented Aug 8, 2026

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Summary

  • Add forward-radar firmware 36802-TWA-A220 to CAR.HONDA_ACCORD.
  • Restore firmware identification for a 2018 Honda Accord Hybrid after a dealer software update.

Root cause

The vehicle previously identified exactly as HONDA_ACCORD with:

  • forward camera 36161-TWA-A070
  • forward radar 36802-TWA-A070

After the dealer update, the camera version was unchanged and the radar reported 36802-TWA-A220. Since A220 was absent from the database, firmware matching returned no candidate and openpilot displayed “Car not recognized.”

Adding A220 produces one exact firmware match: HONDA_ACCORD.

Impact

This changes identification data only. It does not modify Honda controls, CAN parsing, or safety behavior.

Validation

  • Dongle ID: 07690036205f9408
  • Route: 07690036205f9408/000009f8--7aa50954ac
    • Segment 0 is 61.4 seconds and was recorded on openpilot commit 041f324542819de25108ee16d19c24dbf4a22ae0, which contains this PR's exact opendbc change.
    • Live result: HONDA_ACCORD, safety model hondaBosch, forward camera 36161-TWA-A070, and forward radar 36802-TWA-A220.
  • ./test.sh — 4,011 tests passed, 703 skipped; all lint, type, safety, and unit-test checks passed.
  • Direct regression using camera A070 and radar A220 — exact match HONDA_ACCORD.
  • Pre/post vehicle logs retained all prior address/DLC pairs on the primary CAN buses, with no DLC changes.
  • Deployed to the device; the owner subsequently confirmed normal in-car operation.

@github-actions github-actions Bot added car related to opendbc/car/ honda fingerprint labels Aug 8, 2026

@github-actions github-actions Bot left a comment

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Thanks for contributing to opendbc! In order for us to review your PR as quickly as possible, check the following:

  • Convert your PR to a draft unless it's ready to review
  • Read the contributing docs
  • Before marking as "ready for review", ensure:
    • the goal is clearly stated in the description
    • all the tests are passing
    • include a route or your device' dongle ID if relevant

@github-actions

github-actions Bot commented Aug 8, 2026

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Car behavior report

Replays driving segments through this PR and compares the behavior to master.
Please review any changes carefully to ensure they are expected.

Testing 154 segments for: HONDA_ACCORD, HONDA_CIVIC_BOSCH, HONDA_CIVIC_2022, HONDA_CRV_5G, HONDA_CRV_HYBRID, HONDA_HRV_3G, HONDA_INSIGHT, HONDA_E, HONDA_PILOT_4G, HONDA_CRV, HONDA_FIT, HONDA_FREED, HONDA_HRV, HONDA_ODYSSEY, HONDA_PILOT, HONDA_RIDGELINE, HONDA_CIVIC

✅ 0 changed, 154 passed, 0 errors

@michaelmu
michaelmu marked this pull request as ready for review August 8, 2026 19:37
@mvl-boston

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Comma typically wants a testroute to validate. Can you add one?

@michaelmu

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Comma typically wants a testroute to validate. Can you add one?

✅ Added in the PR description

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