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A Bosch Switching-Type Oxygen (O2) sensor uses a zirconia Nernst cell ceramic element to measure the oxygen content in exhaust gases. As the air-fuel mixture shifts between rich and lean, the sensor rapidly switches its voltage output. These fast transitions provide the ECU with real-time lambda data, allowing precise fuel adjustments for stable combustion, effective catalytic converter operation, and reduced emissions.

Modern EPA and Euro 6 emissions standards demand accurate air-fuel-ratio control to ensure clean and efficient combustion. Oxygen (O2) sensors supply the ECU with continuous lambda information, enabling proper catalytic converter function, reduced fuel consumption, and minimized harmful emissions across all operating conditions.

A Bosch Wideband A/F Oxygen (O2) sensor uses a planar pump-cell design to measure the air-fuel ratio continuously across the full lambda range. Instead of switching between rich and lean, the sensor regulates internal pump-cell current to maintain a precise oxygen balance within the sensing chamber. This current is interpreted by the ECU as exact air-fuel-ratio information, allowing highly accurate mixture control for stable combustion, improved efficiency, and reduced emissions.

An Oxygen (O2) sensor should be replaced if a check-engine light appears and diagnostic trouble codes related to fuel-trim or sensor performance are stored, or if symptoms such as poor fuel economy, failed emissions tests, rough idle, or sluggish acceleration occur. Sensors contaminated by oil, coolant, fuel additives, or physical damage should also be replaced to restore accurate air-fuel-ratio control.

Modern EPA and Euro 6 emissions standards demand accurate air-fuel-ratio control to ensure clean and efficient combustion. Oxygen (O2) sensors supply the ECU with continuous lambda information, enabling proper catalytic converter function, reduced fuel consumption, and minimized harmful emissions across all operating conditions.

Bosch Oxygen (O2) sensors require a clean reference-air supply to operate correctly. This reference air is drawn through the gaps between the wire strands inside the sensor’s lead wires. Soldering blocks these air channels and traps contaminants, preventing the sensor from receiving the reference air it needs. This can cause incorrect readings, slow response, or premature sensor failure. SmartLink™ uses Posi-Lock® connectors to maintain proper airflow while still providing a secure, solder-free electrical connection.

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2025 Module Shop of the Year: Schearer's Sales & Service

Bosch awarded Schearer’s Sales & Service of Allentown, Pennsylvania, the 2025 Bosch Module Shop of the Year Award, recognizing the independent repair shop’s leadership in innovation, sustainability, community involvement and long-term industry impact. Chosen from shops across North America, Schearer’s stood out for its participation in the Bosch Automotive Service and Maintenance Module Program, which supports independent shop growth.

The honor highlights Schearer’s investments in the future of automotive repair, including the launch of the ShiftPoint Training Academy in 2025, a hands-on coaching program for front office staff. The shop was also recognized for its strong sustainability practices, such as recycling all used oil and fluids, operating nearly paperless, and reusing waste oil for heating. In addition, Bosch cited Schearer’s active community engagement and its 30-year legacy of providing high-quality, personalized service and meaningful career opportunities within the automotive industry.

Drive Pride in Your Shop!

Become the Next Module Shop of the Year and Win an All-Expense Paid Trip to AAPEX and SEMA plus premium marketing content for your business.

Nominations open in the Summer

 

 

2024 Module Shop of the Year: Maximilian Motorsports

The Bosch Module Program proudly recognized Maximilian Macdonald and his shop, Maximilian Motorsports in Chehalis, WA, as the inaugural Module Shop of the Year.

Maximilian was honored for his outstanding contributions to the future of automotive, sustainability initiatives, and community efforts. His recognition included an all-expense-paid trip for two to Las Vegas, national media exposure, and special acknowledgment from the Bosch team.

To further celebrate his achievement, a Bosch film crew visited his shop to produce a professional video and photo series, which debuted at AAPEX. All marketing assets were provided to Maximilian for use in promoting his business.

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The key cause of injector failures are: Poor fuel filtration Fuel contamination Incorrect installation Always follow the engine manufacturer's maintenance procedures. The majority of diesel engine problems stem from contaminated fuel. Common problems include corrosion from excessive water in the fuel, micro fine particles in the fuel and improper fuel storage, which is caused by water in the fuel. There are two ways in which water can get into the fuel: through the delivery system and through the tank vent.

Always purchase fuel from a reputable service provider and use a proper fuel/water separator. Periodic inspection of the vehicle’s tank vent is also recommended.

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