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.

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.

Bosch SmartLink™ Universal Oxygen (O2) sensors combine OE-specification base sensors with a flexible, patented Posi-Lock® connector system designed for fast, reliable installation across a wide range of vehicles. Each sensor uses the same high-quality zirconia ceramic element and heater design found in Bosch OE applications, ensuring accurate air-fuel-ratio feedback and dependable performance. The SmartLink™ system features Posi-Lock® connectors that create secure, high-temperature & weather resistant electrical connections without the need for soldering, crimping, or specialty tools — allowing technicians to adapt the sensor to existing harnesses quickly and confidently. The extended lead length provides added flexibility for vehicles with damaged or shortened wiring, and the connector system can be reopened and reused if adjustments are needed. Engineered to provide an easy, universal installation experience, Bosch SmartLink™ Universal Oxygen (O2) sensors deliver professional-grade fit and function with the same OE-proven quality and dependability trusted by vehicle manufacturers.

Bosch Distributor Caps and Rotors are made from top quality materials throughout to ensure high performance and long product life.

All Bosch ignition coils are built to achieve or exceed OE specifications and are known industry-wide for their reliability and performance. Bosch ignition coils convert low voltage into high ignition system voltage, creating an electric spark sent to the spark plugs which ignites the fuel.

Bosch Idle Air Control Valves are made with precision engineering and are robustly designed to withstand long engine life.

Vapors are produced in the fuel tank due to external heat radiation or surplus fuel gaining heat before returning to the fuel tank. These vapors are captured and then purged by way of an activated charcoal filter. A purge valve is located between the intake manifold and charcoal canister, and is actuated to allow fresh air to be drawn in through the canister to purge the captured fuel vapors. A faulty canister purge valve will cause a check engine warning and is an emission relevant component.

Bosch Leak detection pumps ensure the evaporative emission system (EVAP) is functioning correctly. Leak detection pumps provide pressure so the system can be checked for leaks while other EVAP system valves are closed. A faulty leak detection pump will cause a check engine warning and is an emission relevant component.

Bosch Platinum+4 Spark Plugs deliver smoother acceleration, top fuel economy and ultimate engine performance. Bosch Platinum+4 Spark Plugs reach self-cleaning temperatures faster for quicker starts, smoother acceleration and increased fuel efficiency.

Bosch Cabin Air Filters are designed and tested to meet High Efficiency Particulate Air (HEPA) standards based on test standard ISO 29463-3, and provides filtration efficiency of 99.97% at 0.3 microns*. This efficiency provides ultimate protection in trapping allergens, dust and other particulates that can enter your vehicle and provides the cleanest air possible for you and your family.

Bosch Workshop Cabin Air Filters are specifically engineered for the professional installer dedicated to helping customers breathe cleaner air. Bosch Workshop Cabin Filters offer an 99%* efficiency rate at 3 microns or greater in capturing dirt, dust and other environmental contaminants from entering the heating and air vents of a vehicle.

Bosch Workshop Oil Filters designed for the professional installer.

Bosch Workshop Air Filters are designed specifically for the Professional installer market offering high vehicle coverage to ensure installers will always have the right air filter.

Bosch Fuel Filters help to protect the most expensive parts of the engine by filtering out foreign particles that can damage a fuel injector. A damaged fuel filter can result in erratic performance, poor gas mileage and in some cases, complete engine shutdown. Even the smallest particles can cause considerable wear and tear to an engine. Protecting the fuel system and the engine from harmful particles, helps to prolong the life of your vehicle. Ensure dependable and trouble-free performance with a Bosch Fuel Filter.

Constantly evolving technologies and state-of-the-art manufacturing over the past 35 years allow Bosch to supply fuel pumps with tight tolerances and compact design, making way for the latest advancement — turbine pump technology. This revolutionary technology replaces older pump designs, providing improved drivability and reduced hot-start problems.

Bosch supplied the industry’s first fuel injection system with a high pressure electric fuel pump in 1967. Since then, Bosch has stood at the forefront of fuel system technology, providing fuel pumps to virtually all vehicle manufacturers. Compared to conventional fuel pumps, Bosch Pumps deliver 30% higher efficiency and the precise fuel supply required for a partial or full load – saving fuel and reducing CO2 emissions.

The high pressure pump is responsible for compressing the fuel supplied by the electric fuel pump to the pressure required for high pressure injection up to 20 MPa (200 bar).

Bosch Port Fuel Injectors (PFI) have a robust design and are capable of using Ethanol fuel (E100). All Bosch fuel injectors released to the aftermarket are OE fit, form and function, and are produced to OE specifications. The Bosch fuel injector has a return rate of 1 part per million (PPM), making Bosch the industry benchmark.

Bosch Gasoline Direct Injection (GDI) provides the basis for a cleaner and more economical engine generation. At the same time, it contributes to the current engine downsizing trend.

Bosch Engine Cooling Fans provide sufficient flow at idle so your vehicle doesn’t overheat while sitting in traffic. They operate with minimal noise, preventing the heterodyning effect common with lower quality and less expensive competitor cooling fans – and the blades are balanced, ensuring safe and durable performance. These cooling fans also have protective functions integrated into the electric drive – like automatic shutdown, in case of any obstructions, and thermal fuse and reverse polarity protection.

This water pump is 100% new and designed to meet exact original equipment specifications. All water pumps are also 100% tested to ensure proper functionality. The torque testing is performed to verify the proper impeller- shaft mating. Torque testing can detect loose impeller- shaft press fits. Water pumps are vacuum leak tested to ensure proper sealing. This test can detect leaks throughout the housing, seals, tube binding and plug leakage. Bosch utilizes OE mating parts and accessories to verify proper fitment. Component mating such as pulley, brake plate, housing and tensioners are included in this fitment verification.

A compact design with nominal 12- or 24-volts. Bosch micro relays are used in a wide range of vehicles. They perform switching operations and allow rated switching currents of up to 25 A. Thanks to their design, they are an ideal solution for quick and easy service tasks.

A compact design with nominal 12- or 24-volts. Bosch mini relays are used in a wide range of vehicles. They reliably perform switching operations and allow rated switching currents of up to 75 A. Thanks to their design, they are an ideal solution for safe and quick service tasks.

Bosch power relays are used for switching operations in engines, starters and other large products. They work with rated switching currents of up to 350 A (and up to 3500 A in the case of battery cut-off relays).

Bosch DuraSpeed sheathed-element glow plugs heat up more quickly and retain their glow longer, ensuring that modern diesels are instantly ready to go – even at temperatures as low as –28 °C. A controlled post-glow phase ensures low emissions and a quiet engine, whilst intelligent energy management relieves the strain on the electrical system and battery. And as a systems provider, Bosch guarantees that every sheathed-element glow plug operates seamlessly inside the engine management system.

Bosch is the leading OE supplier of diesel fuel systems for diesel passenger cars, SUVs, van and pickup trucks. End of line testing using the exact OE test specifications. Guaranteed to provide OE performance and meet all emission specifications. Continuous improvement, manufactured with the latest upgrades to components and specifications.

Bosch’s Remanufactured Diesel Injectors are produced at the same Bosch facility as the new diesel injectors. All wearable parts and critical components are replaced with genuine Bosch parts, and the latest original equipment production technology is used. Bosch remanufactured injectors include all OE updates, so they can often be superior to the OE injectors that they replace.

Bosch Nozzles are designed to withstand the heavy demands of today’s diesel engines. On average, a diesel nozzle fires 1,000 times per minute, so precision and durability are important features. Each Bosch Nozzle is engineered for exacting precision and durability, to deliver a long, reliable service life for consistently superior diesel engine performance.

Bosch Remanufactured High Pressure Pumps are cost-effective and meet the same high standards and safeguards as brand new High Pressure Pumps. Bosch is the leading OE supplier of diesel fuel systems for diesel passenger cars, SUVs, van and pickup trucks. End of line testing using the exact OE test specifications. Guaranteed to provide OE performance and meet all emission specifications. Continuous improvement, manufactured with the latest upgrades to components and specifications.

Bosch High Pressure Pumps come standard on the majority of diesel vehicles, providing superior performance and durability. Bosch is the world's leading OE supplier of diesel fuel systems for passenger cars and trucks. Bosch innovations in common rail fuel injection led the modern diesel revolution. Bosch aftermarket products are produced to the same exacting specifications as our OEM products.

Medium and heavy duty trucks manufactured starting on January 1, 2010 are required to meet the EPA Emission Standards. The majority of truck manufacturers chose to use selective catalytic reduction (SCR) technology to meet the standards. As part of SCR technology, Bosch provides the Denonxtronic 2.2 dosing system which injects urea into the exhaust which interacts with the SCR catalyst to reduce the NOx emissions level. The supply module contains a main filter which filters the urea being pumped into the dosing module. The filter needs to be replaced per the manufacturers’ scheduled maintenance requirements.

Bosch Particulate Matter (PM) sensors continuously monitor the function of the Diesel Particulate Filter (DPF) via direct measurement of soot concentration to help reduce particulate emissions by up to 99%. An evolution from older ΔP sensor’s indirect estimate of soot, Bosch pioneered resistive-measurement Particulate Matter sensors in order to provide precise real-time data to the ECU. With accurate soot data, the ECU can avoid unnecessary DPF regenerations – increasing fuel efficiency, reducing ash buildup, and extending the lifespan of aftertreatment components such as the Diesel Particulate Filter. Bosch offers a full line of robust, durable, and accurate Particulate Matter sensors to the aftermarket with the same sensors currently trusted by OE manufacturers.