Very unlikely that the part has failed at that mileage. What are the symptoms and who's telling you it's bad? A friend of mine was having trouble with his, took it to an independent shop, they cleaned it up, one hour of labor, completely fixed the problem, and the mechanic, recently with the dealer, said "ya, when I was at the dealer we would just replace them rather than clean them". The cost to replace is well over a thousand dollars, and most dealer customers don't question it.