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I was quoted over 3k from the Indy Porsche shops in my area. They each said it was an overblown problem and they would not get it done if it was their car. One shop said they only saw 4 IMS failures in six years and never in a Tip.
I know this is not going to be a popular decision, but I've decided not to replace the IMS. If the failure rate is 8-10%, I like my odds. Would you gamble 10k to win 3k if you had a 90% chance of winning?
I'm going to change the oil every 3k, use a magnetic oil plug, tear the oil filter to check for metal shavings and cross my fingers.
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