ECU swap affect mileage? -
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post #1 of 7 (permalink) Old 06-05-2010, 03:01 AM Thread Starter
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ECU swap affect mileage?

2008 F4 312R +1 that I'm looking to buy. only 2400 miles. Owner stated that he swapped the stock ECU for a "race" ECU. Unknow as to how long or how many miles were done with race ECU, but owner was not happy with it and switched back to stock ECU.


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post #2 of 7 (permalink) Old 06-05-2010, 03:09 AM
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I belive the milage is stored in the cluster and not the ecu. This is true for the 04-06 models.
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post #3 of 7 (permalink) Old 06-05-2010, 04:11 AM
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correct wont change milage

312r with race ecu = awesome!
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post #4 of 7 (permalink) Old 06-05-2010, 08:22 AM
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Originally Posted by MV Guy 12345 View Post
I belive the milage is stored in the cluster and not the ecu. This is true for the 04-06 models.
Yeah, I am getting my tacho (the whole cluster) replaced under warrenty as it is flickering.

Dealer said that this will also reset my mileage back to zero, so I guess it is stored in the cluster...

Must have a battery or something in there?


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post #5 of 7 (permalink) Old 06-05-2010, 08:54 AM
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odo meter and milage is stored in the tacho unit, it has no battery to reset. probaly someone can modify mileage by computer but i have not come across anyone


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post #6 of 7 (permalink) Old 06-05-2010, 02:21 PM
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It is stored in a eeprom chip in the cluster, you would need a chip programmer and the know how to moddify milage. When I worked at a high end body shop, they had the tools to do it on cars where the cluster was replaced and the new one didnt have the correct milage. It was a PITA to do, but was required by some insurance companies.
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post #7 of 7 (permalink) Old 06-05-2010, 03:40 PM
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I thought you were asking if swapping the ECU would affect the mileage you get, not the mileage showing on the cluster.

The answer to that question would be yes, but not much. The greatest affect on mileage is how hard you ride it.
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