You have a large fleet of Defender TD5s on the island and have quit a few problems with them oil making its way down a wiring harness into the ECU leading to failure, which is a common fault. This may not to be too much of a problem on a fleet vehicle, but this would concern you if it happened to your Land Rover. Is there a cure for this problem, or a way to stop it getting to serious?
Oil moving down the engine wiring harness is quite common on the TD5 vehicles. You can reduce the likelihood of it happening by changing the injector harness inside rocker cover as these are now better sealed than the earlier ones.
Have never heard of oil getting into the actual ECU it is only a harness problem and not too difficult or expensive to fix. Even if this does happen to your vehicle it generally manifests itself as poor running rather than no running. It was very skeptical about the reliability of the electronics on the TD5 but we have now had mine for three years and covered nearly 30,000 miles with complete reliability.
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