Bremi Fahrzeug-Elektrik of Germany has been an original equipment manufacturer and after-market supplier of Ignition products for Generations. Bremi's strength lie in their ability to consistently provide industry leadership with innovative technology. Their Air Mass Sensors are manufactured under the same standards (ISO/TS16949). Karlyn Industries has invested in a State-of-the-art testing apparatus whereby all MAF sensors that are intended for the U.S. through Karlyn must pass the same criteria utilized by O.E. Only those certified MAF Sensors will be marked with the Letter "K" in conjunction with the production date. This protects Karlyn's customers from counterfeits or Exporters who cannot guarantee that their MAF Sensors meet US specifications. Karlyn's testing procedures are above and beyond what is done for MAF Sensors intended for other countries and are continually optimized for fast response times resulting in a durable, high performance product that you can rely on!