The OEM Stihl ignition module 1139 400 1311—designed for MS171, MS181, and MS211 chainsaws. Straight terminal version for later serial numbers. Durable, reliable ignition replacement.
Genuine OEM Quality – Manufactured by Stihl for optimal compatibility and performance. 
Straight-Terminal Design – Updated configuration suitable for saws post-manufacturer modifications. 
Model Compatibility – Works with MS171, MS181, and MS211 chainsaws (especially later-model units). 
Correct for Later Serial Ranges – For MS211 saws with serial numbers 294 200 539 and above, this is the required ignition coil version.
 
✅ 100% Genuine Stihl OEM part – guaranteed compatibility and long service life
✅ Fits chainsaw models MS 171, MS 181, MS 211 (including C versions)
✅ Direct replacement for part numbers 11394001311 / 1139-400-1311
✅ Ensures consistent spark and reliable engine ignition
✅ Easy installation with perfect OEM fitment