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Pencil Coils: The Modern Standard and How to Choose a Replacement
Most modern cars use "pencil" or "stick" coils, which are compact units that sit directly on top of each spark plug. When replacing them, it's crucial to choose a quality part. Opt for OEM (Original Equipment Manufacturer) parts or reputable aftermarket brands like NGK, Bosch, or Denso. These ensure the correct voltage output, physical fit, and durability. Cheap, no-name coils often fail prematurely and can cause misfires that damage the catalytic converter.
Q: Can I replace just one failing coil, or should I do all of them?
A: You can replace just one, but it's often a wise long-term investment to replace the entire set, especially if the vehicle has high mileage. The other coils are likely near the end of their service life as well.