Bosch 16421 Premium Switching-Type Oxygen (O2) Sensors

Description

Bosch Switching-Type Oxygen (O2) sensors provide precise air-fuel-ratio measurements to the ECU, ensuring stable combustion control and helping reduce emissions across a wide range of operating conditions. Evolving from the original thimble sensor Bosch pioneered in 1976, Bosch later developed planar narrowband designs that offer faster light-off, improved lambda accuracy, and quicker closed-loop operation. Using advanced ceramic elements, optimized heater control, and high-temperature-resistant materials, Bosch Oxygen (O2) sensors deliver consistent performance even under harsh thermal and vibration loads. 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.

• [SUPERIOR PERFORMANCE] – Bosch Switching-Type Oxygen (O2) sensors deliver precise air-fuel-ratio feedback to the ECU for improved efficiency and reduced emissions, helping your vehicle operate cleaner and remain environmentally compliant
• [OE-TRUSTED] – As the inventor of the Oxygen (O2) sensor, Bosch has supplied OE manufacturers for more than 50 years, providing proven quality and reliability that set the standard for modern lambda-control systems
• [LONG LIFETIME] – Built to withstand exhaust streams up to 1,880°F, Bosch Oxygen (O2) sensors feature stainless steel housings, integrated heater elements, and TSP coating to resist vibration, corrosion, and contamination
• [FAST RESPONSE] – Bosch Switching-Type Oxygen (O2) sensors reach operating temps in <10 seconds and delivers fast signal availability to the ECU, enabling quick closed-loop control for improved cold-start performance and lower emissions
• [WIDE COVERAGE] – Bosch offers one of the broadest portfolios of Switching-Type Oxygen (O2) sensors to market, delivering sensors that meet or exceed OE specifications for millions of vehicles across domestic, European, and Asian nameplates
• [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
• [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