THE NUMBERS ON DIFFERENT AREAS OF OUR VEHICLES HAVE VERY IMPORTANT FUNCTIONS. THE MANUFACTURER DIDN'T JUST FEEL LIKE WRITING IT THERE BUT PUT THEM THERE FOR SPECIFIC PURPOSES. WHENEVER WE ARE SPRAYING VEHICLES, PLEASE MAKE SURE THESE NUMBERS ARE NOT COVERED UP AS SOME OF THEM ARE NOT ENGRAVED BUT PRINTED ESPECIALLY ON PEUGEOT CARS. WHEN CHANGING BODY PARTS, LETS BE CAREFUL THAT THESE NUMBERS ARE N...OTED AND STORED SAFELY. MOST TIMES WHEN VEHICLES HAVE DIFFICULT ELECTRICAL PROBLEMS AND CHECK/ CHECK ENGINE LIGHT IS ON, SOME OF THESE NUMBERS ARE THE ONLY HEADWAY TO COMMUNICATING WITH YOUR VEHICLE'S ELECTRONIC CONTROL UNIT (ECU). KEEP THESE NUMBERS SAFE AND YOU REDUCE STRESS ENCOUNTERED WHEN CARRYING OUT MAINTENANCE ON YOUR VEHICLE.