Audi R8 42/4S Ignition Coil (2007–2019) – Genuine Replacement & Testing Guide

The ignition coil is one of the most critical components in your Audi R8 42/4S (2007–2019) engine system. It is responsible for converting the car’s 12V electrical supply into the high-voltage spark (up to 40,000 volts) needed to ignite the air-fuel mixture inside the combustion chamber. A properly functioning ignition coil ensures smooth acceleration, optimal fuel economy, and reliable engine performance, while a failing one can cause misfires, rough idling, and poor efficiency.

At Natial Drive Nairobi, we supply genuine OEM Audi R8 ignition coils designed to match factory specifications, ensuring durability and superior performance for your supercar.

How the Audi R8 Ignition Coil Works

The ignition coil functions as a transformer:

• Primary winding receives 12V from the battery.

• Secondary winding amplifies voltage up to 25,000–40,000 volts.

• High voltage is sent to the spark plugs, igniting the fuel-air mixture.

Without a healthy ignition coil, your Audi R8 will struggle to maintain peak performance.

Common Symptoms of a Faulty Ignition Coil in the Audi R8

If your R8 ignition coil starts failing, you may notice:

• Engine misfires or loss of power during acceleration.

• Check Engine Light (CEL) illumination.

• Poor fuel economy due to incomplete combustion.

• Hard starting issues or rough idling.

• Unusual vibrations from the engine.

These are strong indicators that it may be time to replace the ignition coil.

How to Check if My Ignition Coil is Good?

Many Audi owners often ask, “How do I know if my ignition coil is working properly?” Here are steps to check:

1. Visual Inspection – Look for cracks, burns, or oil deposits on the coil body.

2. Spark Test – Disconnect the coil, ground the spark plug, and crank the engine. A weak or absent spark indicates failure.

3. Multimeter Test – Measure resistance across the coil terminals:

   • Primary resistance: 0.5–0.8 Ω

   • Secondary resistance: 5,000–7,000 Ω
     Deviations suggest the coil is worn out.

4. Swap Test – Replace the suspect coil with a known good one and see if performance improves.

5. OBD-II Scan Tool – Modern Audi R8 models will store fault codes (P0300–P0308) indicating misfire issues linked to coil failure.

   Why Buy Your Audi R8 Ignition Coil from Natial Drive Nairobi?

   We are Nairobi’s trusted supplier of genuine Audi spare parts, offering:

   • Authentic OEM ignition coils for Audi R8 (2007–2019).

   • Expert guidance to help you test and confirm coil failure before replacement.

   • Competitive pricing compared to dealerships.

   • Warranty-backed products for peace of mind.

   • Nationwide delivery, ensuring fast and reliable access to quality parts.

   By choosing Natial Drive Nairobi, you ensure your Audi R8 gets the right ignition coil replacement to maintain peak performance.

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   Conclusion

   The Audi R8 42/4S ignition coil (2007–2019) is a vital part of your engine’s ignition system, ensuring consistent spark and efficient combustion. Knowing how to check if your ignition coil is good can save you time and protect your supercar from costly damage. For guaranteed performance, always replace faulty coils with genuine Audi OEM parts from a trusted supplier.