Bosch 8257 Premium Wideband A/F Oxygen (O2) Sensors

Bosch 8257 Premium Wideband A/F Oxygen (O2) Sensors

Features:

• True Direct-fit OE connectors and harness
• [MADE IN USA] – Bosch proudly manufactures over 90% of Oxygen (O2) sensors for the North American market out of Anderson, SC — ensuring high quality and supply reliability
• [WIDE COVERAGE] – Bosch offers one of the broadest portfolios of Wideband A/F Oxygen (O2) sensors in the aftermarket, delivering sensors that meet or exceed OE specifications for millions of vehicles across domestic, European, and Asian nam
• [EASY INSTALL] – Engineered for quick installation with direct-fit connectors and pre-applied conductive anti-seize on threads to ensure hassle-free replacement
• [BEST-IN-CLASS WARRANTY] – Bosch backs every Oxygen (O2) sensor with a 1-year, unlimited-mileage warranty for non-commercial passenger cars and light trucks, reflecting the quality and durability built into every unit
• [SUPERIOR PERFORMANCE] – Bosch Wideband A/F Oxygen (O2) sensors deliver high-resolution, real-time air-fuel data that surpasses the limited feedback of switching sensors — allowing for cleaner combustion, better fuel economy, and maximum pe
• [OE-TRUSTED] – As the inventor of the Oxygen (O2) sensor and Wideband A/F technology, Bosch has supplied OE manufacturers for more than 50 years, providing proven quality and reliability that set the standard for modern lambda-control syste
• [LONG LIFETIME] – Built to withstand exhaust streams up to 1,880°F, Bosch Oxygen (O2) sensors feature stainless steel housings, integrated heater elements, advanced ceramic elements, and TSP coating to resist vibration, corrosion, and cont

Bosch Wideband A/F Oxygen (O2) sensors provide continuous, high-precision measurements of the air-fuel ratio across the full lambda range, giving the ECU far more detailed information than traditional switching sensors. This enables exceptionally accurate air-fuel mixture control — supporting improved fuel efficiency, engine performance, and reduced emissions under all operating conditions. Bosch pioneered the first Wideband A/F Oxygen (O2) sensor, introducing the planar pump-cell design that has become the global standard for modern engine management and low-emission technologies. With fast light-off, optimized heater control, and robust ceramic construction, Bosch Wideband A/F Oxygen (O2) sensors deliver reliable performance even during rapid load changes and harsh thermal cycles. Backed by more than five decades of OE development, Bosch supplies a full line of durable, accurate Oxygen (O2) sensors to the aftermarket with the same OE-proven quality trusted by vehicle manufacturers.

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