A vehicle failing its MOT due to the emissions being outside of the prescribed limits is certainly something we can help with.
In most instances, this can happen as a vehicle gets older due to a gradual build-up of “grime” within the car’s fuel and oil systems.
In these circumstances, we would begin by introducing a fuel system cleaning additive and allow that to work its way through the system so that the fuel injectors can be cleaned internally. Should this fail, the next step is to apply an engine cleaning additive before refilling the newly cleaned engine with a premium grade Castrol engine oil.
In most cases, one or both of these steps is sufficient to bring the vehicle’s emission back within the necessary limits to pass your MOT Test. However, should the emissions stay outside of the prescribed limits, further investigation would be needed to identify the cause.