Overview
At LKQ Electriq, we’ve been investing a great deal of time into developing a high‑voltage battery repair solution for the Tesla Model 3, particularly vehicles from 2019 onwards. This work isn’t about quick wins or temporary fixes. It’s about carefully building a repair capability that is safe, scalable, and commercially sensible and one that challenges the long‑held belief that a failed battery pack can only ever be replaced.
Across the EV industry, high‑voltage battery failures are becoming more common as vehicles age and move beyond manufacturer warranty. Through our investigations, we’ve seen a clear and recurring pattern: cell‑level faults that create voltage imbalance within the battery pack. Left unresolved, this imbalance can gradually lead to reduced performance, fault codes, and in some cases, complete vehicle immobilisation.
Importantly, this isn’t an issue limited to a small group of owners. It has wider implications for:
- Independent garages
- Fleet operators
- Insurance providers
- Second‑hand vehicle buyers
As the number of Tesla Model 3s on the road continues to rise, so too does the scale of this challenge.
Today, the standard response to these failures is full battery pack replacement, often using a used or refurbished unit. While this can get a vehicle back on the road, it comes with some clear drawbacks:
- High costs for vehicle owners
- Limited availability of suitable replacement packs
- Ongoing uncertainty about long‑term reliability
- Usable components being scrapped unnecessarily
From both a commercial and environmental point of view, this approach is becoming harder to justify. The industry needs a more balanced alternative. That’s exactly where our R&D work comes in.
Our approach is straightforward: understand the root causes of failure and develop a repair process that is safe, repeatable, and realistic to deliver at scale. To do this properly, we’ve committed significant internal resource to structured testing and development. That work includes:
- Controlled teardown and analysis of multiple battery packs
- Detailed examination of construction methods and materials
- Designing safe procedures for handling, storage, and testing
Rather than rushing something to market, we’ve taken a careful, methodical path, making sure any future repair process stands up to our standards for safety, quality, and consistency.
So far, our testing has highlighted several important points:
- Failure mechanisms are broadly consistent across packs, rather than random
- Gaining access to faults is challenging due to the way the packs are built
- Pack architecture has a significant impact on repair complexity
One key learning is that this type of repair is not well suited to very low‑volume work. The way these modules are integrated means success depends on strong process control, preparation, and the right environment.
In short, this is specialist, high‑level work and it needs to be approached with the right mindset.
What makes this project innovative isn’t a single breakthrough tool or technique. It’s the system being built around the repair itself.
This includes:
- Purpose‑selected specialist equipment
- Repeatable and well‑documented testing procedures
- Controlled repair environments
- A strong focus on health and safety at every stage
We’re deliberately avoiding shortcuts. Whereas, in some parts of the industry, speed is often prioritised over verification. Our focus is different as we want to properly validate each step of the process so any repair carried out is safe, reliable, and suitable for long‑term use. This is how we approach innovation.
Our End Goals
- Ability to carry out Tesla Model 3 battery repairs in‑house
- Offer a genuine repair alternative to full battery pack replacement
- Lower overall costs for customers compared to replacement options
- Reduce waste and improve sustainability by keeping packs in service
- Support repaired packs with our own warranty
Ultimately, this work is about offering customers a credible third option. Something that sits between manufacturer replacement and the uncertainty of used parts.
Next Steps
We’ve reached a point where we have a solid understanding of how and why these batteries fail, and how those failures present themselves in real‑world use. The next phase of the project will focus on:
- Completing controlled repair trials
- Subjecting repaired packs to extensive testing
- Refining processes to improve consistency, safety, and cost control
Given the level of complexity and investment involved, this is not something we’re rushing. As our facilities develop and capacity expands, we’ll continue to move this work forward carefully and deliberately.
