The are "out of sight, out of mind" items, especially if you don't change your own oil. Because of the environment they live in and the oil soaking they experience they are more prone to failure than the heater hoses. A failure of one of those hoses can lead to overheating if you don't have a low coolant sensor circuit (or fail to see the alert if you do).
Overheating can of course lead to head gasket failure and those are no fun to repair- especially on a turbo engine.
The part numbers for those two hoses are 9161383 and 9161384.
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