The definition of a rule is  an official regulation, code of regulations or set practice. An example of a rule is that a red light means stop. An example of a rule is an employer demanding their employees arrive at 8am.
New injectors cost anywhere from $80-$120 apiece, making their replacement a somewhat pricey endeavor. There are three types of injector leaks-it can leak fuel into the manifold from the nozzle, it can leak fuel into the engine compartment from the fuel rail, and it can leak air (vacuum leak) from the manifold.
BMW does offer a maintenance extension program, they call it a âMaintenance Program Upgradeâ that covers years 5 and 6, up to 100,000 miles for all required service. These prices for this upgrade maintenance coverage range from $1,895 for an E46 3 Series to a staggering $3,495 for the BMW V8 turbo-M variants.