Oxygen Sensor Universal Bosch 15737 Fits 87-95 Volvo Mercedes Benz NIB 219W. Bosch Premium Oxygen Sensors Key Features: Double laser-welded stainless steel body protects against contamination Seared protection tube due to 100% functional quality test Pre-coated threads with anti-seize compound right out of the box "True Direct-fit" OE connectors and harness Bosch planar ceramic technology Heater layer: Ceramic sheet printed with electrical contacts and the heater pattern itself Air duct layer: Creates a void for reference air in the finished assembly Sensor Layer: Ceramic sheet with printed layers for the inner (reference air) and outer (exhaust gas) electrodes, as well as electrical contacts and a porous protective layer over the outer electrode to protect it from the corrosive effects of exhaust gases Bosch thimble ceramic technology Base ceramic probe of Zirconium and Yttrium: Forms a tough base that resists cracking from mechanical and thermal shock Patented Platinum Power Grid: For optimized sensing, delivering best-in-class performance and maximum service life Fine particle filter: Prevents contamination of the electrode for longer service life Coarse particle filter: Protects against exhaust gas and other chemical contamination, increasing sensor performance life