Ignition Coil & Spark Plugs for Buick LaCrosse (2005-2009) 3.8L V6
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High-Voltage Ignition Coil & Spark Plugs for 2005-2009 Buick LaCrosse
What it Does: Replaces failing factory ignition coils and fouled spark plugs to restore proper combustion, eliminate misfires, and stabilize idle on the 3.8L V6.
The Stock LaCrosse Weakness
The GM 3800 Series III V6 is incredibly robust, but the factory ignition coils suffer from thermal breakdown due to prolonged under-hood temperatures. Over time, the OEM epoxy potting compound degrades, leading to micro-cracks in the coil housing. This allows moisture intrusion and electrical arcing, which manifests as a dead miss under load, sluggish acceleration, or a flashing check engine light (P0300-series codes). Paired with worn factory plugs, the weakened spark struggles to bridge the gap, resulting in unburnt fuel washing the cylinder walls and reducing the overall lifespan of your catalytic converter.
The Engineering Solution
This complete ignition overhaul includes three high-output replacement coils and six precision-gapped NGK spark plugs engineered specifically for the L26 engine. The upgraded coils feature superior thermal epoxy and enhanced copper wire windings, significantly increasing dielectric strength to resist heat soak and high-voltage leaks. Manufactured under strict ISO/TS16949 certification, these coils deliver a concentrated, high-energy spark that ensures complete, efficient combustion. The included NGK spark plugs utilize an advanced electrode design that prevents carbon fouling, maximizes spark efficiency, and restores the smooth, balanced power delivery the W-body chassis requires.
Technical Specifications
| Fitment | 2005-2009 Buick LaCrosse |
| Engine / Chassis | 3800 Series III (L26) V6 / GM W-Body |
| Stock Output | 200 hp / 230 lb-ft (Approx) |
| Part Number | C849SPEC, 10467067, D555, D576, EBC1518 |
Compatibility
- 2005 Buick LaCrosse 3.8L V6
- 2006 Buick LaCrosse 3.8L V6
- 2007 Buick LaCrosse 3.8L V6
- 2008 Buick LaCrosse 3.8L V6
- 2009 Buick LaCrosse 3.8L V6
The Buick Standard
Engineered to match GM's stringent daily driving demands, this ignition kit ensures reliable cold starts and consistent power delivery, keeping your W-body running smoothly without triggering pesky misfire codes or check engine lights.
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