2018 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 2018, 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$24.91$25.95Save $1.04 (4%)
- Delphi®Ignition Knock SensorAudi S4 2018, Ignition Knock Sensor by Delphi®. Manufactured to meet or exceed OE requirements. Delphi Knock Sensors help maximize engine performance with all fuels. Delphi Knock Sensors prevent engine damage from pre-ignition knocking.Manufactured to restore your vehicle’s ignition systemDesigned with your specific vehicle in mind$21.72
- NTK®Ignition Knock SensorAudi S4 Models Built in Mexico 2018, Ignition Knock Sensor by NTK®. 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$25.93
- Walker Products®Ignition Knock SensorAudi S4 2018, 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 and...Manufactured to restore your vehicle’s ignition systemDesigned with your specific vehicle in mind$24.06
- Audi OEElectrical - Ignition System (Premium Plus / Prestige)Audi S4 2018, 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$12.36 - $76.41
- WVE®Ignition Knock SensorAudi S4 Models Built in Mexico 2018, 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...Excellent replacement for your worn-out factory partDesigned to keep your vehicle running reliably mile after mile$22.98
- WVE®Ignition SwitchAudi S4 2018, 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$98.47
