XJ XJ6 / XJ8 / XJR ( X350 & X358 ) 2003 - 2009

2003 XJR

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Old Oct 24, 2019 | 11:47 AM
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Mussel's Avatar
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Default 2003 XJR

If you change the engine ECM does that change the Mileage reading on the speedometer to what the other car had on it???
 
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Old Oct 25, 2019 | 01:39 AM
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Risks anti-theft so have a plan for that.

Generally you'd expect to get the larger of the mileages to prevent bad behaviour.

Why are you even considering to change it? It's a good way to bigger grief.
 

Last edited by JagV8; Oct 25, 2019 at 01:43 AM.
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Old Oct 27, 2019 | 08:26 PM
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Originally Posted by Mussel
If you change the engine ECM does that change the Mileage reading on the speedometer to what the other car had on it???
No, mileage will remain yours.
 
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