Ignition Coil + Spark Plugs for BMW 5 Series (2004-2005) 4.4L

Direct-Replacement Ignition Coil and Platinum Spark Plug Kit for 2004-2005 BMW 5 Series (E60)

What it Does: The Ignition Coil + Platinum Spark Plug Kit restores factory combustion efficiency and stabilizes idle on the 2004-2005 BMW 5 Series by eliminating high-rpm misfires and unburned fuel events.

The Stock BMW 5 Series Ignition Breakdown

The N62B44 4.4-liter V8 operates under severe underhood thermal loads. Factory pencil coils sitting deep inside the cylinder head wells suffer dielectric breakdown over time, leading to secondary winding insulation failure and spark scatter. Concurrently, factory spark plugs suffer center electrode erosion, widening the gap past nominal limits. This gap increase strains aging coils, triggering intermittent misfires (codes P0300 through P0308), catalyst-damaging raw fuel dump, and sluggish low-end torque delivery.

The Engineering Solution

This complete refresh kit pairs high-durability direct-ignition coil-on-plug units with premium NGK platinum-tipped spark plugs. The replacement coils utilize reinforced thermal housings and high-dielectric epoxy potting to withstand continuous engine-bay heat soak, maintaining consistent primary-to-secondary voltage transfer. The matched NGK platinum plugs resist carbon fouling and electrode wear, ensuring consistent arc initiation, crisp throttle response, and precise flame kernel expansion calibrated for OEM DME dwell-time profiles without throwing check engine lights.

What's Included

• 8 Ignition Coils
• 8 NGK Platinum Spark Plugs

Technical Specifications

Compatibility

• 2004-2005 BMW 545i (4.4L V8)

Frequently Asked Questions & Fitment Warnings

Does this fit the E60 5 Series?

Yes, this is a direct fit for the 2004-2005 BMW 5 Series equipped with the N62B44 4.4L engine; it does not fit 6-cylinder models (525i, 530i) or later 4.8L (550i) configurations with alternate coil connectors.

What torque specifications should be followed during installation?

Torque the NGK spark plugs dry to 25 Nm (18 lb-ft) and verify the coil boots seat firmly onto the terminal posts without excessive downward force.

The BMW Precision Standard

Maintaining European powertrain dynamics demands tight component tolerances; this ignition kit provides smooth engine operation and zero check engine lights across the full RPM range.