Ignition Coil and Iridium Spark Plugs for Buick Regal (2011-2017) 2.4L
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Direct-Fit High-Dielectric Ignition Coil and Iridium Spark Plug Kit for 2011-2017 Buick Regal
Direct Replacement Ignition Service Kit: Engineered specifically to resolve secondary ignition breakdown, cylinder misfires, and rough idle in naturally aspirated and eAssist 2.4L Ecotec engines.
The Stock Regal Coil Insulation Breakdown
Factory ignition coils on the 2.4L Ecotec platform endure severe thermal cycling directly above the cylinder head. Over time, heat soak degrades the internal epoxy encapsulation and silicone spark plug boots, leading to dielectric breakdown and micro-arcing. Simultaneously, factory spark plugs suffer from gap widening and center electrode erosion, increasing the required ionization voltage. This extra electrical load overstresses the coil driver circuitry, triggering P0300 through P0304 misfire codes, hesitations under load, and reduced fuel efficiency.
The Engineering Solution
This comprehensive overhaul kit features four high-grade coil-on-plug units coupled with fine-wire laser-welded iridium spark plugs. The ignition coils are manufactured with high-conductivity oxygen-free copper primary and secondary windings, shielded in high-dielectric PBT housing to resist voltage tracking and thermal breakdown. The paired iridium plugs provide a higher melting point and lower electrical resistance, producing a focused, stable spark kernel under high combustion chamber pressures for complete flame propagation.
Technical Specifications
| Fitment | 2011-2017 Buick Regal |
| Engine / Chassis | 2.4L Ecotec (LAF / LEA / LUK) / GM Epsilon II |
| Stock Output | 182 hp / 172 lb-ft (Approx) |
| Part Number | UF491, 12578224, 12638824, 12578244, C1552, D517A |
Compatibility
- 2011 Buick Regal (2.4L L4 Gas - CXL, Base)
- 2012 Buick Regal (2.4L L4 Gas / 2.4L L4 Electric/Gas - Base, Premium)
- 2013 Buick Regal (2.4L L4 Gas / 2.4L L4 Electric/Gas - Base, Premium)
- 2014 Buick Regal (2.4L L4 Electric/Gas - Base, Premium)
- 2015 Buick Regal (2.4L L4 Electric/Gas - Base, Premium)
- 2016 Buick Regal (2.4L L4 Electric/Gas - Base, Premium)
- 2017 Buick Regal (2.4L L4 Gas - Base, Sport Touring)
The Buick Smoothness Standard
Designed for exact OEM calibration match, this kit restores smooth idle quality, throttle response, and fuel economy with zero check-engine lights.
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