2009 Audi S4 Ignition Relays, Sensors & Switches
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Original (OEM)Ignition PartsYour vehicle's engine needs a powerful spark at the right time to operate at its peak potential. Your ignition system is responsible for producing and transferring this spark. It consists of the ignition switch, ignition coil or... - TRQ®Ignition Knock SensorAudi S4 2009, Ignition Knock Sensor by TRQ®. Don't wait and replace your faulty ignition knock (detonation) sensor that’s your first line of alert in the event of your engine is experiencing detonation problems. This cost-efficient...Manufactured to restore your vehicle’s ignition systemDesigned with your specific vehicle in mind$23.95Save: $0.96 (4%)$22.99
- Walker Products®Ignition Knock SensorAudi S4 4.2L 2009, Ignition Knock Sensor by Walker Products®. If you want to restore the original performance of your vehicle's ignition system, this product is what you need. Engineered to stringent OE specifications, it is sure to fit...Manufactured to restore your vehicle’s ignition systemDesigned with your specific vehicle in mind$50.73 - $57.87
- Beck Arnley®Ignition Knock SensorAudi S4 4.2L 2009, Ignition Knock Sensor by Beck Arnley®. When investing in this superior product by Beck Arnley, expect to get the exact OEM look, function, and fit. The product was developed to stringent factory specifications and...Used to detect engine knocking and to retard the ignition correspondingly in order to prevent engine damageSensor mounted near the cylinder bores in the cylinder block$45.38
- Facet®Ignition Knock SensorAudi S4 Cabriolet 2009, Ignition Knock Sensor by Facet®. Facet products are designed, manufactured, and tested internally and the external works are entrusted to selected partners that operate in an integrated manner with Facet...The reliable goods for increase of reliability of the carQuality equal, if not superior, to that of the original components$43.01 - $44.12
- Vemo®Ignition Knock SensorAudi S4 2009, Ignition Knock Sensor by Vemo®. If you want to restore the original performance of your vehicle's ignition system, this product is what you need. Engineered to stringent OE specifications, it is sure to fit and function...Manufactured to restore your vehicle’s ignition systemDesigned with your specific vehicle in mind$57.53 - $77.98
- Dorman®OE Solutions™ Ignition SwitchAudi S4 2009, OE Solutions™ Ignition Switch by Dorman®. An essential replacement item, Dorman's Ignition Power Switch enables your engine to turn over upon startup, restoring drivability. It also unlocks the power accessories. The...This part has undergone a rigorous quality inspection to ensure high qualityIncludes bezel for a complete repair$138.00
- WVE®Ignition SwitchAudi S4 2009, Ignition Switch by WVE®. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the ultimate in durability and functionality. Made to meet or exceed...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$159.93
- Audi OEElectrical - Ignition System (Cabriolet)Audi S4 2009, Electrical - Ignition System by Audi OE. Keep your Audi looking showroom-new and running at its best with top-grade Audi OE parts. Genuine in quality, fit, and finish, they’re the finest option to go if you want to...Genuine OE replacement for your specific Audi modelDesigned to bring your vehicle back to its pristine condition$12.56 - $136.94
- Vemo®Ignition RelayAudi S4 2009, Ignition Relay by Vemo®. If you want to restore the original performance of your vehicle's ignition system, this product is what you need. Engineered to stringent OE specifications, it is sure to fit and function the same...Manufactured to restore your vehicle’s ignition systemDesigned with your specific vehicle in mind$14.58
- gpd®Ignition Knock SensorAudi S4 4.2L 2009, Ignition Knock Sensor by gpd®. If you want to restore the original performance of your vehicle's ignition system, this product is what you need. Engineered to stringent OE specifications, it is sure to fit and...Manufactured to restore your vehicle’s ignition systemDesigned with your specific vehicle in mind$27.02 - $174.42
- Standard®Intermotor™ Ignition Knock SensorAudi S4 4.2L 2009, Intermotor™ Ignition Knock Sensor by Standard®. If you want to restore the original performance of your vehicle's ignition system, this product is what you need. Engineered to stringent OE specifications, it is sure...Manufactured to restore your vehicle’s ignition systemDesigned with your specific vehicle in mind$78.63 - $92.64
- WVE®Ignition Knock SensorAudi S4 4.2L 2009, Ignition Knock Sensor by WVE®. Replace your worn-out or faulty component with this quality replacement from WVE. This product is designed and tested to ensure the ultimate in durability and functionality. Made to meet...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$106.88 - $129.29
- FAE®Ignition Knock SensorAudi S4 4.2L 2009, Ignition Knock Sensor by FAE®. Knock Sensors prevents from a harmful spontaneous ignition resulting in the knocking effect. Theacyclic uncontrolled combustions results in a high temperature inside the cylinder. This...Manufactured to restore your vehicle’s ignition systemDesigned with your specific vehicle in mind$50.55 - $55.55
- Meyle®Ignition SwitchAudi S4 2009, Ignition Switch by Meyle®. If you want to restore the original performance of your vehicle's ignition system, this product is what you need. Engineered to stringent OE specifications, it is sure to fit and function the...Manufactured to restore your vehicle’s ignition systemDesigned with your specific vehicle in mind$20.74
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