Ignition Coil and Iridium Spark Plugs for Saturn Astra (2008-2009) 1.8L
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Direct-Fit Ignition Coil Pack and Iridium Spark Plug Kit for 2008-2009 Saturn Astra
What it Does: The ignition coil and iridium spark plug kit replaces heat-degraded factory ignition components on the 2008-2009 Saturn Astra to resolve cylinder misfires, restore clean combustion, and sharpen throttle response.
The Stock Saturn Astra Coil Pack Breakdown
The factory monoblock coil cassette on the Astra H sits directly atop the cylinder head inside the valve cover recess, continuously absorbing intense radiant heat. Over time, thermal cycling breaks down the internal epoxy potting and fine copper windings, causing dielectric breakdown, micro-arcing, and intermittent P0300 through P0304 misfire codes. Worn factory plugs also widen their gap, placing higher voltage demands on the aging pack until output drops significantly.
The Engineering Solution
This comprehensive overhaul kit features an engineered four-tower ignition cassette paired with premium fine-wire iridium spark plugs. The coil rail utilizes high-grade thermal resin encapsulation and heat-stabilized thermoplastic boots to resist insulation rupture and moisture intrusion under high thermal loads. Combined with iridium-tipped center electrodes requiring lower firing voltages, this system ensures a concentrated, reliable spark arc for efficient flame front development and smooth high-RPM operation.
Technical Specifications
| Fitment | 2008-2009 Saturn Astra |
|---|---|
| Engine / Chassis | Z18XER (1.8L Ecotec) / Astra H |
| Stock Output | 138 hp / 125 lb-ft |
| Replaces OEM Part # | UF606, 12137619385, 12138643360, 12138647463, 12138678438 |
Compatibility
- 2008 Saturn Astra XE 1.8L L4 (Z18XER)
- 2008 Saturn Astra XR 1.8L L4 (Z18XER)
- 2009 Saturn Astra XE 1.8L L4 (Z18XER)
- 2009 Saturn Astra XR 1.8L L4 (Z18XER)
Frequently Asked Questions
Does this fit the Astra H Astra?
Yes, this is a direct fit for the 2008-2009 Saturn Astra equipped with the Z18XER 1.8L engine.
Are the iridium spark plugs pre-gapped?
Yes, the included iridium plugs come pre-gapped to OEM factory tolerances for immediate bolt-on installation.
The Saturn European Precision Caliber
Engineered for the European-designed Astra H platform, this ignition kit delivers precise signal synchronization and stable primary-to-secondary voltage transfer, keeping sensitive onboard engine management systems happy and check engine lights off.
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