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.

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.

Make sure your car is being serviced by a reputable shop and ask about the parts they use on your diesel engine to ensure they are from the OEM or from an authorized Bosch supplier.

Introduces urea fluid into exhaust system to reduce nitrogen oxides (NOx) emission levels

No, not only are dosing modules application specific, each module has to be specifically tuned for specific spray patterns.

The key cause of high pressure pump failures are: Poor fuel filtration Fuel contamination Incorrect installation Always follow the engine manufacturer's maintenance procedures.

There could be an issue with the nozzle if you are experiencing the following: Increased smoke development (especially with cold starts). Increased combustion noise when the engine is cold. The engine is running rough despite being warm You experience a loss of performance You experience increased fuel consumption If you have any of the above issues, it is recommended to take your vehicle to an experienced diesel repair shop.

Bosch manufactures two types of injectors for common rail – solenoid and piezo. The difference between the two injectors is the speed and precision with which they inject diesel fuel. Solenoid injectors operate at 160 microseconds, and piezo injectors operate at 100 microseconds. The two technologies are not compatible – a solenoid injector can't replace a piezo injector and vice versa.

Remanufactured does not mean “used” or “rebuilt”. It means that the part has been manufactured again. 100% of all parts are examined and the non-wearable parts are re-used. However, if there are any flaws, the part is discarded. The high pressure pump is rebuilt and all wearable components are replaced. The part is then tested before completion. The extent of the remanufacturing and testing process depends on the manufacturer.

If you are purchasing your own high pressure pump, you should purchase from a reputable, OE manufacturer. The quality of any remanufactured high pressure pump depends on the remanufacturing process and components.

A NOx sensor should be replaced if a check engine light indicates a fault, when diagnostic trouble codes related to emissions performance appear, or when signs of failure occur. Common symptoms include poor fuel efficiency, excessive DEF consumption, loss of power, or the SCR system failing to maintain compliance with emission testing.

With the introduction of Euro 6 and EPA 10/13/17 emission standards, accurate measurement of nitrogen oxides became essential for meeting regulatory limits. Bosch NOx sensors provide continuous feedback for Selective Catalytic Reduction (SCR) systems, ensuring correct DEF dosing, reducing harmful NOx emissions, and supporting onboard diagnostics. Without NOx sensors, vehicles can not reliably comply with modern emission regulations.

The functional principle behind the NOx sensor is based on a ceramic electrochemical (amperometric double chamber) design. Exhaust gas passes over the sensing element, where selective electrochemical reactions measure concentrations of nitrogen oxides, oxygen, and even ammonia. The integrated Sensor Control Unit (SCU) processes these signals and communicates real-time data via CAN-bus to the ECU, enabling precise SCR dosing and emission control.

An Exhaust Gas Temperature sensor should be replaced if a check engine light indicates a fault, when diagnostic trouble codes related to temperature monitoring appear, or if symptoms such as failed DPF regeneration, reduced engine performance, or excessive exhaust smoke occur.