Complex sentence: Renault then prepared a package that was to replace the original poor-quality cooler and the change was set to critical regardless vehicle age and mileage, however fatal cooler location in front of the right wheel could not be changed.
Split into simpler sentences: Renault then prepared a package that was to replace the original poor-quality cooler regardless of vehicle age and mileage. However, the fatal cooler location in front of the right wheel could not be changed.