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DISA valve seal is relatively new with OEM part. I never check the oxygen sensors and I only have an OBD2, so not sure I can check with this, but my gas mileage is bang on great. Smoke test, good gas mileage and no misfires, make it hard to think there is a air leak. Highway like 26mph, combined it's like 21 and I live in a high traffic state. I've reset the Cons 1 & 2 frequently since this all started bc I like to monitor this. My engine is great and strong, but sadly if new IACV doesn't resolve this, it's game over and I'll start working on my 2006, reluctantly. I really don't need both, but wanted to drive the 2003 until failure.
Merry Christmas all.
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2003 X5 3.0i Silver (build 07/03)
2006 X5 3.0i Blue
1977 Ferrari 308 GTB
1994 Ferrari 348TS Speciale #14/15
1989 Ferrari Testarossa
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