Fitment - Ignition coil fit for Kohler models M18, M20, MV16, MV18 & MV 20. Replace Number - Ignition coil replace number is 5258401/52-584-01-S/ 5258402/52-584-02-S and AET10403. Function - Improve engine operating efficiency and electrical performance, better recovery and response, directly replace old or damaged ignition coils, and your mower can work normally. Installation - You can save on the cost of buying an engine by replacing the new ignition coil with a small amount of money. It operates well under all engine operating conditions and increases ignition energy for quick start-up. New& High Quality Ignition coil replaces Kohler Nos. 5258401 52-584-01-S, 5258402, 52-584-02-S & John Deere No. AET10403. Manufactured Part Number:5258401 52-584-01-S, 5258402, 52-584-02-S AET10403. Colour:Black+silver Material:Metal+ABS Package Contents: 1x Ignition Coil Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.