Triumph Bonneville T120 T120 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: 26.10.2026, 04:31
Alternator for your Triumph Bonneville T120?
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Prices from recent listings
| Source | Condition | Price (approx.) | Last seen |
|---|---|---|---|
| eBay | Used | 149.00 € | 2026-10-26 |
| eBay | Used | 177.50 € | 2026-10-26 |
| Motorparts-online | Unknown | 140.00 € | 2026-09-27 |
| Motorparts-online | Used | 140.00 € | 2026-09-27 |
| eBay | Used | 177.50 € | 2026-09-27 |
| Louis | Unknown | 110.00 € | 2026-08-26 |
| Louis | Unknown | 118.99 € | 2026-08-26 |
| Louis | New | 135.99 € | 2026-08-26 |
Indicative values only – current prices may vary.
Price comparison: Alternator
Current median for the Triumph Bonneville T120 T120: 140.00 €.
Median across all motorcycle models: around 96 €. This model is 45% above that and more expensive than 75% of the models compared.
Median across Triumph motorcycle models: around 150 €. This model is 5% below that and cheaper than 55% of the models compared.
Compares the medians of the most recent offers found for each model.
Find Triumph Bonneville T120 T120 parts online
hank's free AI report searches specialized shops for Triumph Bonneville T120 T120 parts, including Moore Speed Racing, ARH Custom & Classic British Spares.
About this part
The alternator on your Bonneville T120 T120 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 Triumph Bonneville T120?
Match the exact engine code and the model year of your Bonneville T120 T120, 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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