Audi S4 Alternators and Starters

The charging system has been required as long as we have had a need for an electrical system and from research it’s been since the requirement of horns in motor vehicle in the early 1900’s. An alternator is a voltage generator that uses mechanical energy to rotate a set of magnets within a field of windings called a stator. The alternating current (AC) voltage created by the spinning magnetic field is converted into a usable direct current (DC) voltage with a rectifier and then regulated by a voltage regulator so that the voltage level in the electrical system stays within a specific operating range. The alternator provides all the voltage needed to operate a vehicle, the battery is only used as a reserve for heavier load conditions, as a voltage source for the engine starting system, and to supply a small amount of voltage to the electromagnets in the alternator which boosts the magnetic field in the alternator and increases voltage output.

Product Features:

• Application matched components ensure the charging system can be returned to like new condition.

Litens Automotive is the original equipment supplier to Audi/VW for this decoupling alternator pulley. This replacement pulley is also designed and produced by Litens and is exact in all form, fit, and performance characteristics as the original equipment part (with the exception of not having the car manufacturer’s logo or part number applied to the part). Decoupling pulleys are engine specific and should never be interchanged with other types of pulley technology. The Litens OAD type pulley is designed to free-wheel in one direction and, with an internal spring and damping device, softly engage in the opposite direction. The OAD is designed as a sacrificial part of the front-end accessory drive system, protecting other belt driven component as well as the alternator. The correct decoupler pulley ensures smooth, quiet performance as well as increasing vehicle gas mileage. Under normal driving conditions, the original pulley will require replacement in approx. 60,000 – 70,000 miles. Litens is the world’s largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.

Product Features:

• Patented Original Equipment Design
• Protects the alternator and other front-end accessory drive components.
• Installation instructions included.
• New plastic cap included with the OAD.
• Tools Required – Litens recommends using a long 10mm 12 point driver bit (also known as a triple square) and a 17×20 spline tool such as a Metal Nerd MNXZ10 and a Miller Special Tools P/N 8823 and a torque wrench.
• Professional mechanics can install this replacement OAD in approximately 2 hour. During alternator replacement, belts, tensioners, and routing pulleys should be inspected.
• 56.2mm O.D.; 17mm I.D; 40.6mm width; ribbed running surface for a 6-rib serpentine belt; high-grade steel construction. 17mm Spline bit driver Included for ease of installation.

Product Features:

• BUILT TO LAST: Advanced heat treatment process for strength
• PREMIUM MATERIALS: Precision manufactured using premium-grade steel for lasting performance and extended bearing life
• RELIABLE PERFORMANCE: Element size and quantity are engineered to meet or exceed the load rating of OE bearings
• COMPREHENSIVE COVERAGE: Industry-leading coverage for domestic and import applications
• RIGOROUS TESTING: Comprehensive testing throughout design and development processes by National engineers for quality you can count on

The charging system has been required as long as we have had a need for an electrical system and from research it’s been since the requirement of horns in motor vehicle in the early 1900’s. An alternator is a voltage generator that uses mechanical energy to rotate a set of magnets within a field of windings called a stator. The alternating current (AC) voltage created by the spinning magnetic field is converted into a usable direct current (DC) voltage with a rectifier and then regulated by a voltage regulator so that the voltage level in the electrical system stays within a specific operating range. The alternator provides all the voltage needed to operate a vehicle, the battery is only used as a reserve for heavier load conditions, as a voltage source for the engine starting system, and to supply a small amount of voltage to the electromagnets in the alternator which boosts the magnetic field in the alternator and increases voltage output.

Product Features:

• Application matched components ensure the charging system can be returned to like new condition.

Product Features:

• Engineered to meet or exceed OEM specifications for a perfect fit and hassle-free installation.
• Premium grade solenoids contains materials specifically selected for best conductivity. High temperature cap ensures that the solenoid works flawlessly in high heat environments. High dielectric strength outer case resists shorting.
• Armatures have precision machined and upgraded steel shaft for improved durability and performance.
• Each unit includes a printed copy of the test results so you know exactly what to expect from our parts right from the first time they power on.

Carquest Premium starters are premium constructed, original equipment (O.E.) replacement parts with industry-leading warranties. Our Carquest Premium starters are designed to meet or exceed OE specifications for fit, form and function. Our starters are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. We replace all wear components (brushes, bushings and needle bearings) with new components to ensure long-life. All critical components are electronically tested during assembly and the entire unit is 100% tested, ensuring proper performance backed by an industry-leading warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Bosch Premium Starters are engineered to deliver exceptional performance and reliability, making them a top choice for demanding conditions. Built for extremes, these starters are 100% factory tested to ensure consistent operation under intense heat, freezing cold, and high-demand scenarios. Designed to match or exceed the performance of original equipment parts, they offer seamless compatibility with your vehicle, featuring identical fit and functionality. Utilizing advanced manufacturing technologies and premium-quality components, Bosch starters guarantee optimal performance and extended lifespan. With a clockwise rotation, 9-tooth configuration, and 12 VDC voltage, this remanufactured starter is tailored for precision and efficiency, ensuring your vehicle starts smoothly every time.

Product Features:

Product Features:
• Built for extremes – Our new and reman starters and alternators are 100% factory tested to ensure reliable performance, under extremes of heat, cold and high demand
• Our new and reman starters and alternators are designed to perform equal to or better than the original equipment parts, that they replace
• Our new and reman starters and alternators are designed to be identical in fit and performance to original equipment parts
• Our new and reman starters and alternators utilize the latest manufacturing technologies and highest quality parts to ensure the best performance and longest life
• Engineered for precision and efficiency, this remanufactured starter features a 9-tooth configuration and 12 VDC voltage, ensuring smooth and reliable vehicle starts every time.

Carquest Premium starters are premium constructed, original equipment (O.E.) replacement parts with industry-leading warranties. Our Carquest Premium starters are designed to meet or exceed OE specifications for fit, form and function. Our starters are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. We replace all wear components (brushes, bushings and needle bearings) with new components to ensure long-life. All critical components are electronically tested during assembly and the entire unit is 100% tested, ensuring proper performance backed by an industry-leading warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

As a recognized expert in Electrical Systems since 1923, Valeo is a global top supplier of original equipment starters. As an original equipment partner to all major car manufacturers, 1 in 3 vehicles worldwide are equipped with an original Valeo electrical system. Valeo premium starters are 100% new, eliminating the risk of premature failure.

Product Features:

• Valeo premium starters are 100% new products (not remanufactured)
• All components are 100% new eliminating premature failure for increased durability over remanufactured units
• Direct replacement ensuring a perfect fit and easy installation
• Extreme condition testing ensuring reliability under the harshest demands: noise, vibration, corrosion, durability
• Speed, temperature, and electrical measurement tests can undergo up to 40,000 cycles to ensure dependable performance
• Part Number 438239 is the original equipment part now available in the aftermarket.

Product Features:

• Engineered to meet or exceed OEM specifications for a perfect fit and hassle-free installation.
• Premium grade solenoids contains materials specifically selected for best conductivity. High temperature cap ensures that the solenoid works flawlessly in high heat environments. High dielectric strength outer case resists shorting.
• Armatures have precision machined and upgraded steel shaft for improved durability and performance.
• Each unit includes a printed copy of the test results so you know exactly what to expect from our parts right from the first time they power on.

Carquest Premium starters are premium constructed, original equipment (O.E.) replacement parts with industry-leading warranties. Our Carquest Premium starters are designed to meet or exceed OE specifications for fit, form and function. Our starters are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. We replace all wear components (brushes, bushings and needle bearings) with new components to ensure long-life. All critical components are electronically tested during assembly and the entire unit is 100% tested, ensuring proper performance backed by an industry-leading warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

The Valeo premium alternator, boasting a robust 180-amp output and 12 VDC voltage, is engineered for exceptional performance and reliability. As a 100% new product, it eliminates the risks associated with remanufactured units, ensuring long-lasting durability. Designed with application-specific components for a precise fit, this alternator incorporates premium rare earth magnets to maximize efficiency without increasing size. Rigorous testing under extreme conditions for up to six months guarantees reliability even in the harshest environments, while its resistance to heat, vibration, and contaminants ensures consistent charge output. Recognized for innovation, Valeo’s alternators enhance fuel economy and eliminate voltage drops, making them a trusted choice for original equipment and aftermarket needs. Part Number 439795, now available in the aftermarket, exemplifies Valeo’s commitment to quality and performance.

Product Features:

• Valeo premium alternators are 100% new products (not remanufactured)
• 100% new components and core eliminates premature failure for increased durability over remanufactured units
• All parts are application specific for an exact fit
• Premium rare earth magnets increase the output of the alternator without increasing the size for better efficiency
• All applications go under extreme condition testing up to 6 months to ensure reliability under the harshest conditions and electrical demands
• High resistance to heat, vibration, and contaminating particles helps maintain maximum charge output
• Part Number 439795 is the original equipment part now available in the aftermarket.

The Bosch Premium Alternator, delivering 120 amps and operating at 12 VDC with a clockwise rotation, is engineered for peak performance and reliability. This remanufactured unit undergoes 100% factory testing and full-load evaluations to meet Bosch’s stringent performance standards, ensuring dependable operation in demanding conditions. Built with high-quality materials and advanced technology, it offers exceptional durability and long-lasting performance. Whether you’re replacing a worn-out alternator or upgrading for better efficiency, this alternator is designed to keep your vehicle’s electrical system running smoothly. Trust Bosch for a premium solution that combines precision engineering with unmatched reliability.

Product Features:

Product Features:
• Full-load tested to guarantee compliance with Bosch’s strict performance specifications
• 100% factory tested, units are remanufactured (not rebuilt)
• Built to last – uses high quality materials and the most technologically advanced developments.
• Designed to ensure smooth and efficient operation of your vehicle’s electrical system, even under demanding conditions.
• Engineered with precision to deliver consistent 120-amp output for reliable performance and enhanced efficiency.

The Bosch Premium Alternator delivers exceptional performance and reliability, making it a top choice for your vehicle’s electrical system. With a robust 120-amp output and 12 VDC voltage, this alternator ensures consistent power delivery for all your vehicle’s needs. Engineered with precision, it features full-load testing to meet Bosch’s stringent performance standards and is 100% factory tested for quality assurance. Unlike rebuilt units, this alternator is remanufactured using high-quality materials and cutting-edge technology, ensuring long-lasting durability. Its clockwise rotation direction and advanced design make it a dependable replacement part that stands up to demanding conditions. Choose Bosch for a premium alternator that combines superior craftsmanship with unmatched value.

Product Features:

Product Features:
• Full-load tested to guarantee compliance with Bosch’s strict performance specifications
• 100% factory tested, units are remanufactured (not rebuilt)
• Built to last – uses high quality materials and the most technologically advanced developments.
• Delivers consistent 120-amp output to support a wide range of vehicle electrical demands.

The Valeo premium alternator delivers exceptional performance and reliability, making it a top choice for automotive electrical systems. Designed with 100% new components and core, this alternator eliminates the risk of premature failure, ensuring long-lasting durability compared to remanufactured units. Featuring premium rare earth magnets, it achieves superior efficiency by increasing output without enlarging its size. Engineered for exact fit with application-specific parts, it guarantees seamless compatibility and hassle-free installation. Tested under extreme conditions for up to six months, this alternator withstands heat, vibration, and contaminants, maintaining maximum charge output even in the harshest environments. With a robust 150-amp rating, 12 VDC voltage, and clockwise rotation, it meets demanding electrical requirements while boosting fuel economy. As the original equipment part now available in the aftermarket, Valeo’s award-winning innovation ensures reliable performance and value for your vehicle.

Product Features:

• Valeo premium alternators are 100% new products (not remanufactured)
• 100% new components and core eliminates premature failure for increased durability over remanufactured units
• All parts are application specific for an exact fit
• Premium rare earth magnets increase the output of the alternator without increasing the size for better efficiency
• All applications go under extreme condition testing up to 6 months to ensure reliability under the harshest conditions and electrical demands
• High resistance to heat, vibration, and contaminating particles helps maintain maximum charge output
• Part Number 439658 is the original equipment part now available in the aftermarket.

The Valeo premium alternator delivers exceptional performance and reliability, making it a top choice for demanding electrical systems. Built with 100% new components and core, this alternator eliminates the risk of premature failure, ensuring long-lasting durability compared to remanufactured units. Designed for an exact fit with application-specific parts, it offers seamless compatibility and hassle-free installation. Featuring premium rare earth magnets, it achieves superior efficiency by increasing output without enlarging its size. With an impressive 140-amp rating and 14 VDC voltage, this alternator is engineered to handle high electrical demands. Rigorous testing under extreme conditions for up to six months guarantees reliability in the harshest environments, while its resistance to heat, vibration, and contaminants ensures consistent maximum charge output. Recognized for innovation, Valeo alternators enhance fuel economy and eliminate voltage drops, making them a valuable investment for any vehicle.

Product Features:

• Valeo premium alternators are 100% new products (not remanufactured)
• 100% new components and core eliminates premature failure for increased durability over remanufactured units
• All parts are application specific for an exact fit
• Premium rare earth magnets increase the output of the alternator without increasing the size for better efficiency
• All applications go under extreme condition testing up to 6 months to ensure reliability under the harshest conditions and electrical demands
• High resistance to heat, vibration, and contaminating particles helps maintain maximum charge output

Carquest Premium alternators are premium constructed, original equipment (O.E.) replacement parts with industry-leading limited warranties. Our Carquest Premium alternators are designed to meet or exceed OE specifications for fit, form and function. Our alternators are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. We replace all wear components (brushes, bushings and bearings) with new components to ensure long-life. All critical components are electronically tested during assembly and the entire unit is 100% tested, ensuring proper performance backed by an industry-leading limited warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:

Product Features:
• Designed to meet or exceed OE specifications for fit, form and function
• Remanufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
• Regulators and rectifiers are 100% electronically load tested for reliable charging performance
• 100% new OE-quality brushes and bearings are used to ensure long service life
• Rotors and stators are load tested and double insulated for maximum charging performance
• Slip rings are precision polished for maximum brush contact and service life
• Application-specific technical bulletins included where applicable
• All units are 100% triple tested to ensure quality and performance
• Technical support team staffed with ASE Certified Technicians: 1-800-228-9672

Carquest Premium alternators are premium constructed, original equipment (O.E.) replacement parts with industry-leading warranties. Our Carquest Premium alternators are designed to meet or exceed OE specifications for fit, form and function. Our alternators are remanufactured by an IATF/TS 16949 certified supplier that meets the highest standards achievable. We replace all wear components (brushes, bushings and bearings) with new components to ensure long-life. All critical components are electronically tested during assembly and the entire unit is 100% tested, ensuring proper performance backed by an industry-leading warranty. We also offer technical support at 1-800-228-9672 for product questions, diagnostic troubleshooting and installation assistance by ASE Certified Technicians.

Product Features:

• Designed to meet or exceed OE specifications for fit, form and function
• Remanufactured by an IATF/TS 16949 supplier that meets or exceeds the highest standards in the industry
• Regulators and rectifiers are 100% electronically load tested for reliable charging performance
• 100% new OE-quality brushes and bearings are used to ensure long service life
• Rotors and stators are load tested and double insulated for maximum charging performance
• Slip rings are precision polished for maximum brush contact and service life
• Application-specific technical bulletins included where applicable
• All units are 100% triple tested to ensure quality and performance
• Technical support team staffed with ASE Certified Technicians: 1-800-228-9672

The Ignition switch is the main power switched distribution point in every vehicle. The ignition switch in some manner will be connected directly to the vehicle battery and then supply power out to every operating system in the vehicle that is required to be connected and disconnected from the vehicle’s battery or power source.

Product Features:

• Computer-Aided Design (CAD), laser scanning and 3D printing – utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) – in the connector terminal design process ensures speed-to-market and a precise connector fit guaranteed.
• Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
• 100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
• 100% end-of-line tested to ensure confidence and product reliability, every time.

The Ignition switch is the main power switched distribution point in every vehicle. The ignition switch in some manner will be connected directly to the vehicle battery and then supply power out to every operating system in the vehicle that is required to be connected and disconnected from the vehicle’s battery or power source.

Product Features:

• Computer-Aided Design (CAD), laser scanning and 3D printing – utilizing Fused Deposition Modeling (FDM) and Stereolithography (SLA) – in the connector terminal design process ensures speed-to-market and a precise connector fit guaranteed.
• Product constructed to meet all design and operating characteristics as intended by the vehicle manufacturer.
• 100% thermo-shock and vibration tested to ensure superior performance in extreme conditions.
• 100% end-of-line tested to ensure confidence and product reliability, every time.