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When changing batterys to fobs some times you have to reprogramme them to the car , go on youtube and ask the same question as a few cars need to reset different ways
try a battery reset.ie. disconnect battery neg terminal and leave 10mins reconnect and retry lock and unlock then see if the smart key is regonized if not check the smart key battery specialy the contacts it may be the key is not been reconized but if it cranks but not start may be a engine management system or fuel delivery problem if it has asked to insert smart key the key battery is poss flat.
RockAuto has parts for your 2009 JAGUAR XF 4.2L V8 Supercharged and all ... XF 4.2L V8 Supercharged Ignition Parts, Camshaft Position Sensor Crankshaft ...
My Genesis has the battery in the trunk and the owners manual shows using the key hidden in the FOB and using the keyhole under the trunk lid. Why does your key "blade" not work?
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