The EGR Tube is among those parts that emphasize the constant quality and high result of Mercury Mariner vehicles. Originally intended to reduce the levels of hazardous nitrogen oxide (NOx), the EGR Tube re-circulates exhaust fumes back into the engine so as to reduce the temperatures of combustion and thus the efficiency of the engine is increased. This feature is necessary to sustain the Mercury Mariner perennial image of providing safe and ecological friendly vehicle. Originally designed for compatibility with several Mariner models, each version of the EGR Tube in this series has gradually been altered both in terms of material and structure to better fit later models as well. It is thus pivotal to maintain the Mercury Mariner, since problems with the EGR Tube, conspicuous by rough idling or an engine that rattles, are usual occurrences. The Mercury Mariner which was a unique vehicle received features such as a four-cylinder engine after the company had not offered it since 2002; it was ranked in the Consumer Digest optimal Buy category. Thus, the EGR Tube can be considered to be one of the key components of the Mariner's system, which has a positive effect on the model's fuel consumption rate and, as a result, on the level of its emissions. To be more specific, EGR Tube is one of the most significant parts in automotive market because EGR tube governs the local emissions of vehicles and Mariner's performance as a whole, that is why this part is crucial for any Mariner's owner. Nevertheless, being a complementary part ensuring the car's reliability, performance and environmental compliance the EGR Tube remains an essential component for preserving the Mercury Mariner brand.
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