As electric vehicles (EVs) become more mainstream, one question still lingers for many drivers: What happens if the battery fails? At Cedar Electric, we hear this concern regularly—from first-time EV owners to longtime Tesla drivers, especially around fixing a Tesla car battery cost and whether repair is even possible.
Our Managing Director, Kevin Pearce, sat down with Rory Reid from AutoTrader who has been following the fortunes of a high mileage Tesla (430,000 miles, with a 72% state of health on the battery). His question was… “When the battery eventually dies, how much does it cost to replace?”. They covered a number of topics including component availability, the benefits of using green parts and Kevin offered some valuable insights based on what we see in the workshop every day.
Watch the video below to see the true cost of an EV battery replacement – and what Tesla owners like you need to know.
Case Study: A High-Mileage Tesla With a Dead Battery.. and a Surprise Upgrade
The vehicle in question? A 2021 Tesla Model 3 with over 65,000 miles on it. Purchased used for about £17,000 the car’s battery failed soon after. Understandably, the owner feared the worst: a costly repair.
Instead, Tesla replaced the battery under warranty with a brand-new 2024 LFP (Lithium Iron Phosphate) pack – providing better efficiency and even longer range that the original.
This story is more common than many realise: battery failures within the warranty period are rare, and if they do fail, you’re usually covered – sometimes with an upgrade.
How Much Does an EV Battery Replacement Actually Cost?
At Cedar Electric, ‘fixing a Tesla car battery cost’ is one of the most common search queries we see—especially from used EV buyers or Tesla owners with high mileage who are worried about long-term affordability.
Here’s what our customers tell us they’re being quoted:
| Tesla Model | Battery Replacement Cost (Out of Warranty) |
|---|---|
| Model 3 | £13,000-£16,000 + VAT |
| Model S/X | £17,000-£19,000 + VAT |
| Labour/Parts | £500-£2,500 + VAT |
Costs vary depending on the battery’s condition, factors such as whether it’s new or refurbished, as well as availability. Cedar Electric works with customers to explore all available options, including module-level repairs and remanufactured packs when feasible.
What Tesla's Warranty Covers
Most Tesla battery packs are covered for 8 years or 100,000–120,000 miles, depending on the model. If the battery dips below 70% capacity in that time, Tesla typically replaces it—often with a newer or better pack.
Before buying a used EV, our team at Cedar Electric can:
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Advise on the warranty status
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Run a battery health report to advise condition at the time of testing
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Advise on future repair or replacement planning
Why Battery Repair Might be Better Than Replacement
Here’s the good news: EV batteries, especially in Tesla’s, are designed to last. On the rare occasions they fail, and you do need a repair, here’s why it’s still a smart investment:
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Battery longevity: Many retain over 90% capacity after 5–6 years of regular use.
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Lower long-term maintenance: No oil changes, fewer mechanical parts, fewer surprises.
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Cheaper than a genuine replacement: A £5,300 battery repair versus a cost of up to 3 times this amount with the manufacturer.
How Cedar Electric Supports EV Owners
Affordable repair options
Warranty consultation & claims support
Guidance on used EV purchases
