Ignition Coil + Spark Plugs for Chevrolet Optra (2004-2007) 2.0L

Direct-Replacement Ignition Coil and Spark Plug Kit for 2004-2007 Chevrolet Optra 2.0L (J200 / U20SED)

What it Does: The ignition coil and spark plug kit restores secondary ignition voltage and consistent flame-kernel propagation on the 2004-2007 Chevrolet Optra to eliminate engine misfires, rough idle, and unburned hydrocarbon emissions.

The Stock Chevrolet Optra Ignition Breakdown

On the GM J200 platform equipped with the 2.0L U20SED D-TEC engine, the factory coil pack is subjected to intense thermal cycling due to its close mounting proximity to the cylinder head. Over time, the internal epoxy resin degrades, leading to dielectric breakdown and micro-cracking across the winding insulation. Concurrently, factory copper-core spark plugs experience severe electrode erosion and gap enlargement past factory specifications. This widened gap increases the required secondary breakdown voltage, overworking the coil pack and triggering common P0300 through P0304 misfire codes, hesitations under load, and catalytic converter fuel washing.

The Engineering Solution

This direct-fit ignition refresh kit pairs a heavy-duty single ignition coil pack with four matched spark plugs to restore optimal combustion chamber efficiency. The ignition coil module features high-temperature epoxy potting and heavy-gauge primary and secondary copper windings designed to resist internal arcing, thermal degradation, and heat soak. Paired with precision-gapped plugs engineered for superior thermal conductivity and anti-fouling resistance, this kit delivers consistent high-kV discharge under load. Replacing both coils and plugs simultaneously guarantees uniform spark duration, crisp throttle response, and restores stoichiometric combustion balance across all four cylinders.

Technical Specifications

Compatibility

• 2004 Chevrolet Optra Base, LS 2.0L L4 Gas (J200)
• 2005 Chevrolet Optra Base, LS 2.0L L4 Gas (J200)
• 2006 Chevrolet Optra Base, LS 2.0L L4 Gas (J200)
• 2007 Chevrolet Optra Base, LS 2.0L L4 Gas (J200)

Frequently Asked Questions

Does this fit the J200 Optra?
Yes, this is a direct fit for the 2004-2007 Chevrolet Optra equipped with the U20SED engine.

Are spark plug wires included with this ignition kit?
No, secondary spark plug lead wires are not included and should be inspected for high resistance prior to reinstallation.

The Chevrolet Reliability Standard

Engineered for high commuter mileage and consistent cold-start operation, this ignition assembly delivers precise electrical continuity without triggering false-positive check engine lights or misfire counts.