Accident Damage Casings
Underside battery case repairs and replacements for accident and impact damage on high-voltage batteries - a repair-first alternative to full battery replacement.
Damaged Battery Casing Failure
Damage to an EV battery casing (battery enclosure) is most commonly caused by an external impact - for example striking a pothole, road debris/rocks, or a kerb/bollard. The casing is designed to protect the high-voltage battery internally from water ingress and physical damage, and on many vehicles it also forms part of the vehicle’s underbody structure.
In many cases, insurers and some service networks will default to “replace the complete battery pack”, which can lead to a significant reduction in the value of the vehicle. Where it is safe and appropriate, LKQ Electriq can provide a repair-first route to restore the vehicle's operation at a cost-effective price.
Depending on the location and severity of the damage, our solution may include:
- A full battery pack removal and internal inspection to confirm there is no cell/module damage.
- Repairing minor casing damage only where it is in a non-critical area and can be validated.
- Replacing the battery casing/enclosure (for example with a suitable used casing) while retaining the original modules where they are confirmed undamaged.
- Replacing the complete pack where the damage is directly beneath cells/modules or where safety cannot be guaranteed.
Selection of Covered Vehicles - Accident Damage Casing Repairs
All Vehicles
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Case Studies
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Common Symptoms
Visual underside damage
Drivers or workshops may notice dents, gouges, cracks, punctures, or missing fittings on the underside of the battery pack.
This may indicate a risk of casing breach, compromised sealing, or an impact close to modules or cooling circuits.
Isolation faults (often after water ingress)
Drivers may see HV warnings, reduced performance, and the vehicle refusing to drive or charge due to an isolation-related fault.
This can indicate moisture ingress into the battery enclosure or HV components, contamination, or a developing internal short.
Unexplained electrical faults following an impact
Drivers or workshops may notice intermittent faults, contactor-related errors, or new faults after a known impact such as striking a pothole at speed or hitting debris or rocks. This may indicate moisture or contamination affecting internal electronics, connectors, or the battery management system (BMS).
Discovered during service / inspection (no warning lights)
Damage may be discovered on a ramp during routine servicing, tyre work, MOT preparation, or a recall inspection, even without warning lights. This can indicate early-stage enclosure damage before it triggers diagnostic faults.
Vehicles Affected
- Primarily BEVs (battery electric vehicles), especially vehicles with underfloor battery packs.
- Case-by-case: some vehicles with alternative pack locations may be less exposed, but impact damage can occur on any vehicle with an underbody pack.
What's Included?
Initial triage and damage assessment
Explain a key technical point relating to the serviceWe start with what you know (impact history, warning messages, recovery notes) and what we can see (underside inspection). We look at the location of the damage and whether it is likely to be in a critical area (for example near cells/modules, cooling plates, or HV penetrations).
Safety-first decision: repair, casing replacement, or pack replacement
Battery casing work must be approached conservatively. Where the damage is minor and in a non-critical void area, a repair may be possible. Where the casing is punctured, compromised, or near critical internals, replacement is typically the safer route. If the damage is beneath cells/modules, a complete pack replacement may be required.
Battery removal and internal inspection
Where casing integrity is in question, we remove the pack to inspect internally. This is essential to confirm there is no cell/module damage, contamination, or evidence of a thermal event risk.
Casing replacement / repair and validation
If casing replacement is the right solution, we can (where appropriate) retain the original battery modules and transfer them into a suitable replacement casing.
All work is backed by a 12-month warranty covering both parts and labour, giving you peace of mind and confidence in the quality of our service.
Top guys for Tesla did HV battery replacement good communication and kept me updated. Would recommend.