2024-2025 Tesla Cybertruck HV Harness Connection Issue
Tesla has identified a potential poor crimp connection in the AC junction box to fast charge contactor HV harness on certain 2024-2025 Cybertrucks. This issue can lead to increased resistance and localized heating. A new harness version is available for replacement during other procedures.
Si applica anche a
- Tesla Cybertruck
- 2025
Symptoms
Owners of affected 2024-2025 Tesla Cybertruck vehicles may experience issues related to a poor crimp connection in the AC junction box to fast charge contactor HV harness. This can lead to increased electrical resistance and localized heating within the harness.
Diagnosis / Trigger Conditions
This issue is primarily addressed when the ancillary cover of the vehicle is removed for other service procedures. During such times, technicians are advised to inspect and potentially replace the affected component.
Repair Procedure Summary
To resolve the potential poor crimp connection in the Tesla Cybertruck HV harness, the manufacturer recommends replacing the AC junction box to fast charge contactor HV harness. The replacement should be with a newer version of the harness.
Required Tools or Parts
The specific part required for this repair is the AC junction box to fast charge contactor HV harness, version -J or later. This updated harness is designed to prevent the poor crimp connection issue.
Owner Action
Tesla is addressing this issue proactively during other service visits. If your 2024-2025 Tesla Cybertruck HV harness requires attention, it will likely be identified and replaced by a service technician when your vehicle is in for other maintenance or repairs that require removal of the ancillary cover. There is no immediate action required from owners unless they are experiencing specific symptoms related to the electrical system or charging.
Source: NHTSA ID 11026874
Frequently Asked Questions
- What is the problem with the Tesla Cybertruck HV harness?
- The problem involves a potential poor crimp connection in the AC junction box to fast charge contactor HV harness on certain 2024-2025 Tesla Cybertrucks. This can lead to increased electrical resistance and localized heating.
- What are the potential symptoms of the Cybertruck HV harness issue?
- While not explicitly stated as owner-perceivable, the poor crimp connection can cause increased resistance and localized heating in the harness. This could potentially manifest as issues with the electrical system or charging over time.
- How is the Tesla Cybertruck HV harness issue resolved?
- The issue is resolved by replacing the affected AC junction box to fast charge contactor HV harness with an updated version, specifically version -J or later. This replacement is typically performed when the ancillary cover is removed for other service procedures.
- Should I take my Cybertruck to the dealer specifically for this issue?
- According to the manufacturer communication, this repair is to be performed if the ancillary cover is removed for other procedures. It suggests a proactive replacement during existing service visits rather than requiring a dedicated appointment for this specific issue unless you are experiencing related problems.
What Tesla Cybertruck owners report
Counted from the records in our database across 3 model years.
- 213
- Owner complaints
- 11
- Recalls
- 58
- Service bulletins
- 27
- Crashes reported
- 2
- Fires reported
- 21
- Injuries reported
The 2024 model year
178 complaints, the 1st most of 3 model years on file. Owners reported 23 crashes, 2 fires and 19 injuries for this year, which also has 11 recalls on file.
Electrical System, the system this article covers, accounts for 65 of 213 complaints (31%), including 56 for 2024.
Complaints by model year
| 2024 | 178 | |
|---|---|---|
| 2025 | 26 | |
| 2026 | 9 |
Most-reported systems
- Electrical System — 65
- Structure — 41
- Forward Collision Avoidance — 28
- Steering — 22
- Lane Departure — 19
Latest recalls for the 2024 model year
- 26V255000 — Wheels (Apr 2026)
- 25V735000 — Exterior Lighting (Oct 2025)
- 25V699000 — Exterior Lighting (Oct 2025)
Recent owner reports about electrical system
The PCS2 (Power Conversion System) is an integrated power module that handles AC home charging, DC-DC conversion for the 48V low-voltage systems, and PowerShare (V2L/V2H).
Read owner complaints →The contact owns a 2024 Tesla Cybertruck. The contact stated that while driving 20 MPH with the autopilot feature engaged the vehicle failed to stop at a stop sign. The contact manually intervened and stopped the vehicle.
Complaints are owner reports filed with NHTSA. They are unverified, and counts depend on how many vehicles were sold, so they are not a failure rate.
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