Ignition Coil + Platinum Spark Plugs for Jeep Grand Cherokee (2023-2024) 5.7L
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High-Dielectric Ignition Coil & Platinum Spark Plug Tune-Up Kit for 2023-2024 Jeep Grand Cherokee (WL)
What it Does: The complete ignition kit replaces worn coil-on-plug units and eroded plugs on the 2023-2024 Jeep Grand Cherokee 5.7L to eliminate cylinder misfires, restore combustion efficiency, and stabilize idle quality.
The Stock Jeep Grand Cherokee Ignition Breakdown
The dual-plug cylinder head design of the 5.7L HEMI V8 subjects ignition components to extreme thermal cycling and extended secondary voltage demand. Over time, OEM coil housings suffer thermal fatigue, leading to internal dielectric breakdown, micro-arcing, and epoxy potting fractures. Coupled with electrode gap erosion on 16 factory plugs, this causes high-load spark blowout, hesitation during Multi-Displacement System (MDS) cylinder deactivation transitions, and erratic P0300–P0308 misfire codes under heavy towing loads.
The Engineering Solution
This master overhaul kit features 8 reinforced coil-on-plug assemblies engineered with high-conductivity copper windings and high-grade silicone boots to suppress flashover and resist heat soak. Paired with 16 pre-gapped NGK Platinum spark plugs, the fine-wire center electrode design optimizes spark kernel expansion, decreases required strike voltage, and resists carbon fouling. Direct interchange coverage matches factory specs like UF504 and 56029129AF for seamless ECU dwell time synchronization without PCM recalibration.
What's Included
- 8 Direct-Fit Ignition Coils
- 16 NGK Platinum Spark Plugs
Technical Specifications
| Fitment | 2023-2024 Jeep Grand Cherokee |
|---|---|
| Engine / Chassis | 5.7L HEMI V8 (Eagle) / WL |
| Stock Output | 357 hp / 390 lb-ft |
| Replaces OEM Part # | UF504, 5018, 26C1027, V33-70-0011, SKIC102, CUF504, C1526VC, 2IGC0173, 673-5202, 52-1828, C1526SPEC, EBC1007, 140038-8, 140038K, 140038K-8, 2IC405, 50090, 36-8121, 2505-302202, IGC0164, E1004, 5602129AA, 56029129AA, 56029129AB, 56029129AF, GN10352, 8255, 82553, 48716, U5121, C-693, 140038, 68060346AA, 68238603AA, C1526, 2-50090, 921-2093, 5C1569 |
Compatibility
- 2023 Jeep Grand Cherokee 5.7L V8
- 2024 Jeep Grand Cherokee 5.7L V8
Frequently Asked Questions & Fitment Warnings
Does this fit the WL Grand Cherokee?
Yes, this is a direct fit for the 2023-2024 Jeep Grand Cherokee equipped with the 5.7L HEMI V8 engine. This kit does not fit 3.6L Pentastar V6 or 2.0L 4xe turbo hybrid powertrains.
Do I need to gap the spark plugs or adjust dwell settings?
The included NGK Platinum spark plugs come pre-set to factory clearance, but gap verification prior to installation is recommended; always torque plugs to factory spec and replace all 16 plugs simultaneously to ensure balanced secondary resistance.
The Jeep Standard
Built to handle heavy payload capacities and sustained towing grades, this complete ignition refresh delivers the sustained voltage and thermal endurance required for uncompromising HEMI reliability.
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