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Used Audi e-tron / Q8 e-tron battery health & degradation data
Last updated: · 21 sourced data points
Audi's first large electric SUV, sold as the e-tron and later as the Q8 e-tron. AVILOO's median for all versions is about 93% at 100,000 km, and Audi says its own usage data show about 90% on average after five years and 100,000 km. Sources: AVILOO GmbH, Audi Austria.
Battery options: e-tron 50 (71 kWh gross) and e-tron 55 (95 kWh gross, 86 kWh usable), 2019–2022; renamed Q8 e-tron from 2023 with 95 kWh (Q8 50) and 114 kWh (Q8 55) packs; SUV and Sportback.
Estimate the expected battery health of a e-tron by mileage and age → (uses the data on this page; not a test)
Battery health by mileage (independent tests)
| Mileage | Median SoH | Range covering 99% of tested cars |
|---|---|---|
| 50,000 km (≈31,069 mi) | 95.7% | 90.0% – 98.2% |
| 100,000 km (≈62,137 mi) | 93.1% | 86.6% – 96.5% |
| 150,000 km (≈93,206 mi) | 91.3% | 83.7% – 95.9% |
Source: AVILOO GmbH, published 2026-09-03; n=21,797 tests of this model (all battery sizes grouped, global). Bar scale 75–100%.
Battery health vs mileage – all sources
Text summary of the chart
- AVILOO test: 13 points (from datasets of n=21,907 tests in total; dataset medians, lines show the 99% band), 90.0% to 98.3% between 29,509 and 167,442 km
- Other test, dataset or maker data: 3 points, 88.0% to 91.1% between 76,000 and 200,000 km
- Owner-reported or listing (n=1): 3 points, 90.8% to 98.0% between 60,000 and 103,000 km
All data points
| Variant | Mileage | SoH | Type | Sample | Measured by | Source (date) |
|---|---|---|---|---|---|---|
| e-tron (all versions), Audi fleet data, 5 years | 100,000 km ≈ 62,137 mi |
90.0% | Average | n/a | Manufacturer usage-data analysis (Audi) | Audi Austria (undated page) Manufacturer figure ("rund 90 Prozent" after five years at 100,000 km), not independently verified. |
| e-tron (all versions), Audi fleet data, high mileage | 200,000 km ≈ 124,274 mi |
88.0% | Average | n/a | Manufacturer usage-data analysis (Audi) | Audi Austria (undated page) Manufacturer figure ("etwa 88 Prozent" at 200,000 km), not independently verified. |
| All battery variants grouped | 50,000 km ≈ 31,069 mi |
95.7% 99% band 90.0%–98.2% |
Median | n=21,797 | AVILOO FLASH Test | AVILOO GmbH (2026-09-03) Band = central 99% of tested cars (p0.5–p99.5). |
| All battery variants grouped | 100,000 km ≈ 62,137 mi |
93.1% 99% band 86.6%–96.5% |
Median | n=21,797 | AVILOO FLASH Test | AVILOO GmbH (2026-09-03) Band = central 99% of tested cars (p0.5–p99.5). |
| All battery variants grouped | 150,000 km ≈ 93,206 mi |
91.3% 99% band 83.7%–95.9% |
Median | n=21,797 | AVILOO FLASH Test | AVILOO GmbH (2026-09-03) Band = central 99% of tested cars (p0.5–p99.5). |
| e-tron 55 quattro (86 kWh usable), one car | 114,000 km ≈ 70,836 mi |
93.0% | Single car | n=1 | AVILOO PREMIUM Test (independent SoH) | avilootest.cz (undated page) Single car, n=1, just under 114,000 km. AVILOO PREMIUM: 93%, 80.28 kWh usable (±3%). Two AVILOO FLASH tests on the same car gave 91% and 92.1%; the car's BMS showed 88–89%. |
| e-tron 50 (71 kWh) | >100,000 km ≈ 62,137 mi |
93.0% | Average | n/a | AVILOO test (dealer) | Carla AB (2026-07-08) Average of tested cars with more than 100,000 km; sample size per model not published. |
| e-tron 55 (95 kWh) | >100,000 km ≈ 62,137 mi |
92.9% | Average | n/a | AVILOO test (dealer) | Carla AB (2026-07-08) Average of tested cars with more than 100,000 km; sample size per model not published. |
| Q8 50 e-tron 95 kWh, UK car | 55,921 km ≈ 34,748 mi |
96.4% | Single car | n=1 | AVILOO FLASH Test (independent SoH) | Car360 (2026-02-09) Single car (n=1). Published mileage 34,748 miles. Car's own BMS SoH on the same certificate: 95%. |
| Q8 55 e-tron 114 kWh, UK car | 29,509 km ≈ 18,336 mi |
94.7% | Single car | n=1 | AVILOO FLASH Test (independent SoH) | Car360 (2026-02-17) Single car (n=1). Published mileage 18,336 miles. Car's own BMS SoH on the same certificate: 91%. |
| e-tron 55 95 kWh, UK car | 37,536 km ≈ 23,324 mi |
98.3% | Single car | n=1 | AVILOO FLASH Test (independent SoH) | Car360 (2026-03-11) Single car (n=1). Published mileage 23,324 miles. Car's own BMS SoH on the same certificate: 99%. |
| Q8 55 e-tron 114 kWh, UK car (another) | 38,969 km ≈ 24,214 mi |
94.1% | Single car | n=1 | AVILOO FLASH Test (independent SoH) | Car360 (2026-03-16) Single car (n=1). Published mileage 24,214 miles. Car's own BMS SoH on the same certificate: 91%. |
| e-tron 50 (71 kWh), one car | 66,776 km ≈ 41,493 mi |
92.0% | Single car | n=1 | AVILOO FLASH Test (independent SoH) | EVX / Flooratto Kft. (2026-10-01) Single car, n=1. Hungary, tested 2026 (pre-purchase inspection). |
| e-tron 55 (95 kWh), one car | 167,442 km ≈ 104,044 mi |
90.0% | Single car | n=1 | AVILOO FLASH Test (independent SoH) | EVX / Flooratto Kft. (2026-10-01) Single car, n=1. Hungary, tested 2026 (pre-purchase inspection). |
| e-tron (2019), bought used | 95,000 km ≈ 59,030 mi |
98.0% | Single car (owner-reported) | n=1 | Dealer battery test (owner-reported) | GoingElectric (2024-09-18) Owner-reported, n=1 (forum reply 2025-02-02): VW dealer battery test before purchase in 2024 showed 98% at 95,000 km. Test method not stated. |
| e-tron 55 (86 kWh usable), six years old | after 6 years | 90.8% | Single car | n=1 | AVILOO FLASH Test (independent SoH) | InsideEVs (2026-06-08) Single car (n=1): about 76 kWh usable left of 86 kWh net, reported as about 90.8%. Current mileage not stated; the owner bought it about 18 months earlier at about 45,000 km with a dealer battery sheet showing 92%. Mostly charged at home, usually to 80%. |
| Q8 e-tron 50 (89 kWh), 3 years old | 60,000 km ≈ 37,282 mi |
90.8% | Single car (owner-reported) | n=1 | Car's own BMS SoH read-out (owner-reported) | MOTOR-TALK (2026-01-21) Owner-reported, n=1 (forum post 2026-01-21). Charged 99% at home on 10 kW AC. Car-reported value, not an independent test. |
| e-tron 50 (2021) | 103,000 km ≈ 64,001 mi |
93.8% | Single car (owner-reported) | n=1 | Car's own BMS SoH read-out (owner-reported) | MOTOR-TALK (2026-01-21) Owner-reported, n=1 (forum reply 2026-01-21). Car-reported value, not an independent test. |
| e-tron 50 (2020, 71 kWh gross) | 76,000 km ≈ 47,224 mi |
91.1% | Single car | n=1 | Measured usable capacity (drive/discharge test) | Bjørn Nyland / TB Test Results (rows dated 2019-01-15 to 2026-10-14 (each row has its own test date)) Single car (n=1). Published as 8.9% degradation (58.2 kWh measured vs 63.9 kWh new) after 2 years and 304 cycles, tested 15.09.2022; note says "DC fast charged a lot". Odometer published as 76 (thousand km). |
| e-tron (2019), very high mileage, US | 554,752 km ≈ 344,707 mi |
91.0% | Average (range, not SoH) | n=1 | Recurrent range score (range vs new, not capacity SoH) | Recurrent (2024-08-06) Single car (n=1) at 344,707 miles: Recurrent range score 91. This measures estimated range vs new, not battery capacity. |
| e-tron 55 (95 kWh) | avg 88,645 km ≈ 55,081 mi |
94.2% | Average | n=110 | AVILOO quick test (dealer) | Ny Teknik / Riddermarks Bil (2026-06-18) 99.1% of tested cars above 90% SoH. Mileage is the average of tested cars. |
Data gaps: Large datasets group all versions or cover the original e-tron 50/55; only a few single-car results so far for the 114 kWh Q8 55 pack.
What to check when buying a used e-tron
- Ask an Audi Service Partner for a battery health check: Audi reads the SoH with its ODIS diagnostic software and documents it in writing – the same measurement used for warranty claims. (Audi Austria)
- Owners read the car's own BMS SoH with OBD apps, but forum users warn the figure moves with temperature and charging history; an independent AVILOO test gives a figure you can compare with the results on this page. (MOTOR-TALK)
- Ask for the Audi battery health certificate if buying Approved Used. (Audi UK)
- Compare any test result with the ranges above and with the ADAC rule of thumb: at least 92% at 50,000 km, 88% at 100,000 km, 84% at 150,000 km, 80% at 200,000 km. (ADAC)
Battery warranty (UK)
Audi UK: battery covered for 8 years or 100,000 miles; repair or replacement if capacity measured by an Audi Centre is below 70%. Audi Approved Used electric cars under 8 years old come with a battery health certificate. Source: Audi UK, checked 2026-10-20. Always confirm the terms for the specific car with the manufacturer.
Check how much battery warranty a e-tron has left → (by registration date and mileage)
Questions to ask the seller of a used e-tron – printable battery checklist → (dealer or private sale)
Sources used on this page
16 sources · 21 data points: 7 from non-AVILOO methods, 14 measured with AVILOO tests.
- Large test datasets (3 sources, 6 data points): AVILOO GmbH, Carla AB, Ny Teknik / Riddermarks Bil
- Connected-car / telematics (1 source, 1 data point): Recurrent
- Single-car tests (8 sources, 9 data points): avilootest.cz, Car360, [2], [3], [4], EVX / Flooratto Kft., InsideEVs, Bjørn Nyland / TB Test Results
- Owner-reported (2 sources, 3 data points): GoingElectric, MOTOR-TALK
- Manufacturer (2 sources, 2 data points): Audi Austria, Audi UK
Owner-reported and listing values are single cars (n=1) read from the car, an app or an OBD tool – useful examples, not averages. Range-retention figures (Recurrent) measure range, not capacity. Full details: methodology & all sources.
Got a battery certificate for this car? How to read an EV battery health certificate →
Get this specific car tested
We are not paid by these test providers. How we make money.
Model averages can't tell you about the car in front of you. An independent battery test (typically a short OBD plug-in test, some remote) gives an SoH figure and often a certificate you can use when negotiating.
- AVILOO – Independent OBD-based battery test (FLASH / Premium) with certificate; available via partners in the UK and EU.
- Generational – UK OBD plug-in test with certificate (SoH, range, remaining warranty, cell balance); sold through dealers and independent mobile testers.
- Moba – Postal OBD kit: you run the test yourself and post the box back for a digital battery certificate (Europe – check vehicle support and delivery country).
Prices change – check the provider's site. Provider names are used for identification only.
Useful products and services
- Charging cable: check that the car comes with its charging cable(s) at the viewing. If one is missing, replacements are sold separately: e-tron charging cables at EV King paid link.
- Tyres: check tread depth and wear at the viewing. To price replacements, search by the size printed on the tyre wall: car tyres at Tyres UK paid link.
- Parts and tools: wiper blades, bulbs, 12V batteries and tools for the car you buy: GSF Car Parts paid link (UK).
Some links are paid links: we may earn a small commission at no extra cost to you. This never changes the battery data we show (disclosure).
FAQ
What battery health is normal for a used Audi e-tron / Q8 e-tron?
In AVILOO's 2026 report (independent tests, all battery sizes grouped) the median SoH was 95.7% at 50,000 km, 93.1% at 100,000 km and 91.3% at 150,000 km. 99% of tested cars at 100,000 km fell between 86.6% and 96.5%.
What is the Audi e-tron / Q8 e-tron battery warranty in the UK?
Audi UK: battery covered for 8 years or 100,000 miles; repair or replacement if capacity measured by an Audi Centre is below 70%. Audi Approved Used electric cars under 8 years old come with a battery health certificate.
How can I check the battery of a specific Audi e-tron / Q8 e-tron?
Use an independent battery test (OBD-based or remote) and compare the result with the ranges on this page. Model averages cannot tell you the condition of one specific car.
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