Fix Teslemetry HW4 mileage sensors not created for streaming vehicles

[Bre77]

Breaking change

Proposed change

The miles_since_reset and self_driving_miles_since_reset sensors are now created for streaming HW4 vehicles by reading driver_assist from the vehicle's config in the Teslemetry metadata at platform setup, the same source the climate platform already uses for rhd and cop_user_set_temp_supported. The HW4 check read vehicle_config_driver_assist from the vehicle data coordinator, which a streaming vehicle never refreshes, so the key was always missing and the sensors were never added.

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes Teslemetry: 'Miles since reset' / 'Self-driving miles since reset' sensors never created for streaming HW4 vehicles home-assistant/core#184150
• This PR is related to issue:
• Link to documentation pull request:
• Link to developer documentation pull request:
• Link to frontend pull request:

Checklist

• I understand the code I am submitting and can explain how it works.
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[coderabbitai]

📝 Walkthrough

Walkthrough

Sensor setup now reads vehicle driver-assist hardware from metadata to select sensors that require HW4. Tests use metadata for hardware selection and verify that unknown hardware does not enable hardware-gated mileage sensors.

Changes

HW4 sensor gating

Layer / File(s)	Summary
Metadata-based HW4 selection homeassistant/components/teslemetry/sensor.py, tests/components/teslemetry/test_sensor.py	Sensor setup uses metadata’s config.driver_assist value to determine whether the vehicle is HW4. Tests provide hardware through metadata and cover unknown hardware alongside existing firmware threshold cases.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix

Merge Risk: 🔵 Low · up to 807f8

A nullable vehicle configuration can prevent Teslemetry sensors from setting up. This is a narrow metadata edge case; the change is mergeable with null-safe handling tracked for follow-up.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 2 files.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly summarizes the fix: HW4 mileage sensors were not created for streaming vehicles.
Description check	✅ Passed	The description explains the sensor creation bug and the metadata-based fix. It is directly related to the changeset.

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Actionable comments posted: 1

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Inline comments:
Review comments at @homeassistant/components/teslemetry/sensor.py:
- Around line 1673-1676: Normalize the metadata lookup used to determine hw4 so
missing or null vehicle metadata and config values fall back to an empty mapping
before reading driver_assist. Preserve the existing comparison with
DRIVER_ASSIST_HW4.

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📥 Commits

Reviewing files that changed from the base of the PR and between 067f882 and 807f8c7.

📒 Files selected for processing (2)

• homeassistant/components/teslemetry/sensor.py
• tests/components/teslemetry/test_sensor.py

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[Bre77]

Approved

[Bre77]

Firstmate: opened upstream as home-assistant#184632