BMW F 850 GS K81 Alternator
New, used, or aftermarket – from sellers across Europe.
Parts availability
This part appears to be widely available.
Estimated price range
Widely available Limited Hard to find
Last updated: 17.10.2026, 07:28
Alternator for your BMW F 850 GS?
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Prices from recent listings
| Source | Condition | Price (approx.) | Last seen |
|---|---|---|---|
| Mymoto24 | Unknown | 43.90 € | 2026-10-17 |
| Motorparts-online | Unknown | 114.00 € | 2026-10-17 |
| Mymoto24 | Unknown | 199.90 € | 2026-10-17 |
| eBay | Used | 206.58 € | 2026-10-17 |
| eBay | Used | 147.50 € | 2026-09-22 |
| eBay | Used | 147.50 € | 2026-09-22 |
| Rebike-teile | New | 69.00 € | 2026-08-24 |
| Motorparts-online | Unknown | 114.00 € | 2026-08-24 |
Indicative values only – current prices may vary.
Price comparison: Alternator
Current median for the BMW F 850 GS K81: 131.90 €.
Median across all motorcycle models: around 96 €. This model is 40% above that and more expensive than 70% of the models compared.
Median across BMW motorcycle models: around 140 €. This model is 5% below that and cheaper than 50% of the models compared.
Compares the medians of the most recent offers found for each model.
Find BMW F 850 GS K81 parts online
hank's free AI report searches specialized shops for BMW F 850 GS K81 parts, including Cheshire Bike Breakers, Motoplanet & Bike-Parts-BMW.
About this part
The alternator on your F 850 GS K81 charges the battery and powers the electrics while the engine runs. A failing alternator causes dimming lights, a dying battery and eventually a vehicle that won't start.
Frequently asked questions
What should I check when ordering a replacement alternator for the BMW F 850 GS?
Match the exact engine code and the model year of your F 850 GS K81, as alternators differ in output (amps) and mounting. Check whether the pulley is included or needs to be transferred.
Is a remanufactured alternator a good option?
Yes – remanufactured alternators are tested to OEM specs and are often significantly cheaper than new. They're a reliable and economical choice for most vehicles.
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