Engine Control Module — 309-605

THUNDERMAX Engine Control Module — 309-605 – 23-26 Touring, 23-25 CVO

THUNDERMAX
1020-4289
309-605
  • Stand-alone replacement for the factory ECM
  • Includes wide-band oxygen sensors, plug-in harness, AutoTune module, and USB cable
  • No wire-cutting, splicing, or dyno required
  • For EFI-equipped Harley-Davidson® motorcycles
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€1,257.92
€1,527.46
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The ECM is built exclusively for EFI-equipped Harley-Davidson® motorcycles and delivers precise control of fuel and ignition for smoother performance.

Designed as a stand-alone replacement for the factory unit, it installs without modifying the bike's wiring harness.

The unit arrives fully assembled with wide-band oxygen sensors, a plug-in harness, an AutoTune module, and a USB communication cable to simplify setup.

No wire-cutting, splicing, or dyno required — a straightforward plug-in upgrade for dependable rideability. 🔧

: 1020-4289
In Stock

Data sheet

Units
Each
Brand
THUNDERMAX
Harley Family
CVO
Touring

This product fits the following vehicles. Use the filters below to narrow down the list if needed.

Manufacturer Model Family Year Notes
Harley Davidson Electra Glide Highway King 114 Touring 2023 Only Models from May 2023 up
Harley Davidson Road King Special 114 Touring 2024
Harley Davidson Road King Special 114 Touring 2025
Harley Davidson Road King Special 114 Touring 2023 Only Models from May 2023 up
Harley Davidson Glide Ultra Limited 114 Touring 2024
Harley Davidson Ultra Limited Shrine Edition 114 Touring 2023 Only Models from May 2023 up
Harley Davidson Street Glide 107 Touring 2023 Only Models from May 2023 up
Harley Davidson Street Glide 117 Touring 2024
Harley Davidson Street Glide 117 Touring 2025
Harley Davidson Street Glide 117 Touring 2026
Harley Davidson Street Glide Special Anniversary 114 Touring 2023 Only Models from May 2023 up
Harley Davidson Street Glide CVO 121 CVO 2024
Harley Davidson Street Glide CVO 121 CVO 2025
Harley Davidson Street Glide CVO 121 CVO 2023 Only Models from May 2023 up
Harley Davidson Street Glide ST 117 Touring 2023 Only Models from May 2023 up
Harley Davidson Street Glide Ultra 121 Touring 2025
Harley Davidson Road Glide Limited 114 Touring 2024
Harley Davidson Road Glide Limited 114 Touring 2023 Only Models from May 2023 up
Harley Davidson Road Glide Limited Anniversary CVO 117 CVO 2023 Only Models from May 2023 up
Harley Davidson Road Glide 107 Touring 2023 Only Models from May 2023 up
Harley Davidson Road Glide 117 Touring 2024
Harley Davidson Road Glide 117 Touring 2025
Harley Davidson Road Glide 117 Touring 2026
Harley Davidson Road Glide RR CVO 131 CVO 2025
Harley Davidson Road Glide Special 114 Touring 2023 Only Models from May 2023 up
Harley Davidson Road Glide CVO 121 CVO 2024
Harley Davidson Road Glide CVO 121 CVO 2025
Harley Davidson Road Glide CVO 121 CVO 2023 Only Models from May 2023 up
Harley Davidson Road Glide ST 117 Touring 2023 Only Models from May 2023 up
Harley Davidson Road Glide ST CVO 121 CVO 2024
Harley Davidson Road Glide ST CVO 121 CVO 2025