Tested good on tractor.
- OEM PART RE531808 - DESCRIPTION ENGINE CONTROL UNIT - SUB PART SE502800, SE502801, RE520953 - MARKED RE531808 - OEM DETAILS ENGINE CONTROL UNIT - PART DETAILS - VIDEO LINK - SUB PACKET - SHIPPING - PART PRICE 1 YEAR PARTS $1,789 6 MONTH PARTS $1,579 - WARRANTY USED DOES NOT COVER WEAR PARTS (SEALS, BEARINGS, CLUTCH DISC, GASKETS, ETC) or LABOR.