Ignition Coil & Iridium Spark Plugs for BMW Z4 (2006-2011) 3.0L I6

Direct-Replacement Ignition Coil & Iridium Spark Plugs for 2006-2011 BMW Z4

Restores lost ignition efficiency and eliminates misfires in the N52 naturally aspirated engine: This complete ignition service kit replaces degrading factory coils and plugs to provide a consistent, high-voltage spark for optimal combustion and idle stability.

The Stock Z4 Ignition Coil Degradation

The naturally aspirated N52 inline-six requires precise ignition timing, but factory pencil-style coils are notorious for thermal degradation. Situated directly within the cylinder head, OEM coils endure intense, continuous heat soak during normal operation. As internal epoxy and winding insulation break down after thousands of thermal cycles, the coils lose their secondary voltage capacity. This manifests as intermittent misfires under load, rough idling, delayed throttle response, and a flashing Check Engine Light. Paired with worn factory spark plugs where the gap has widened, the ignition system struggles to fire lean air-fuel mixtures, robbing the engine of power and efficiency.

The Engineering Solution

This comprehensive kit updates the N52 ignition system with six upgraded coils and six iridium spark plugs. The redesigned coils utilize high-dielectric epoxy and thicker internal copper windings to resist thermal breakdown, ensuring consistent voltage output under extreme temperatures. By employing an advanced iridium alloy center electrode, the spark plugs resist spark erosion and maintain a precise gap significantly longer than traditional alternatives. The fine-wire design requires less voltage to bridge the gap, which reduces strain on the ignition coils and promotes a stronger, more complete burn. The result is a stabilized idle, restored fuel economy, and crisp throttle response.

Technical Specifications

Compatibility

• 2006-2008 BMW Z4 3.0i (Naturally Aspirated 3.0L I6)
• 2006-2008 BMW Z4 3.0si (Naturally Aspirated 3.0L I6)
• 2009-2011 BMW Z4 sDrive30i (Naturally Aspirated 3.0L I6)

The BMW Calibration Standard

Designed for stringent Euro precision, this comprehensive ignition kit ensures perfect DME synchronization and CEL-free operation, restoring the smooth, linear power delivery that defines the classic BMW naturally aspirated inline-six.