At a glance
What can fail
The EGR cooler may leak internally, allowing coolant to mix with diesel soot. This can create smouldering particles that melt the intake manifold, risking fire.
What the fix does
Dealers will inspect and replace the EGR cooler if needed. If internal leakage is found, the intake manifold will be replaced and the EGR pipe cleaned.
Summarized — see the official notice for exact wording, dates, and contacts.