These sealed Td5 injector looms are modified by having a special electrical potting compound applied around the plug wiring which prevents oil travelling through the injector harness and eventually to the ECU. Covered by our 4 year warranty.
Oil in the ECU plugs on vehicles fitted with the TD5 engine, particularly the Discovery 2 L318, is a very common problem which can cause random running issues.
After changing the TD5 injector loom oil will remain in the wiring so you should periodically clean each end of the loom with electrical cleaner. We recommend daily for a week, then weekly for a month to fully remove the oil. This is also a good opportunity to replace the rocker cover gasket which has normally gone hard and no longer seals properly. Fitting the injector loom should take no longer than 20 minutes. When re-tightening the rocker cover bolts it is essential they are torqued correctly and evenly.