<p>Stop downtime and keep your Cummins gas engines running smoothly with the right spark plug — no more guessing, no more OEM delays. This <strong>Cummins spark plug</strong> delivers consistent ignition performance across C8.3, ISB5.9G, ISC8.3, ISL, L9N, and QSL9 gas platforms — exactly what your maintenance schedule demands.</p> <ul> <li>Direct-fit replacement for part numbers <strong>4955850, 4937472, and 5473010</strong> — verified against Cummins CM2180/CM2380/CM558 engine control modules</li> <li>Engineered for high-temperature, high-compression natural gas environments — includes nickel-alloy center electrode and tapered seat design to prevent carbon buildup and misfires</li> <li>Ships same-day from our Guangzhou warehouse (MOQ just 1 piece) — bypass 3–4 week OEM lead times</li> <li>Backed by XUNPO’s 6-month warranty and technical support from engineers who’ve serviced these engines on-site worldwide</li> </ul>
| Parameter | Details |
|---|---|
| Part Name | Spark Plug |
| Part Number (OEM Reference) | 4955850, 4937472, 5473010 |
| Brand Compatibility | Cummins |
| Fit For Cummins Engine | C GAS PLUS CM556, C8.3 G, ISB5.9G CM2180, ISC8.3 G CM2180, ISC8.3 G CM2180 C101, ISL G CM2180, L GAS PLUS CM556, L9N CM2380 L124B, QSL9 G CM558 |
| Condition | New Aftermarket |
| Warranty | 3–12 months against manufacturing defects |
| Packaging | Original sealed box with brand labeling and part number marking |
| Brand | Applicable Models |
|---|---|
| Cummins | C GAS PLUS CM556, C8.3 G, ISB5.9G CM2180, ISC8.3 G CM2180, ISC8.3 G CM2180 C101, ISL G CM2180, L GAS PLUS CM556, L9N CM2380 L124B, QSL9 G CM558 |
Gas-powered Cummins engines in construction, mining, and municipal fleets demand precise ignition — yet downtime from misfires, rough idling, or failed spark plugs costs operators thousands per day. OEM replacements often take 2–4 weeks to arrive, while counterfeit or non-spec spark plugs cause premature electrode erosion, inconsistent combustion, and repeated cylinder deactivation. Matching the correct plug across multiple gas engine variants — ISB5.9G, QSL9, L9N — adds complexity when maintenance windows are tight.
This Cummins spark plug (4955850 / 4937472 / 5473010) is manufactured in ISO 9001-certified facilities used by Tier-1 suppliers for global aftermarket distribution. Every batch undergoes pre-shipment resistance, gap tolerance, and thermal cycling verification to ensure OEM-equivalent performance in high-compression natural gas environments. We’ve supplied over 12,000+ spark plug units to fleet operators across North America and Southeast Asia since 2021 — all verified for direct fitment on Cummins ISB5.9G, ISC8.3 G, ISL G, L9N, and QSL9 gas platforms during scheduled engine tune-ups and emergency repairs.
This spark plug operates reliably in heavy-duty applications: landfill compactors running on biogas, municipal refuse trucks using compressed natural gas (CNG), quarry haulers with QSL9 G powertrains, and port-side container handlers powered by ISL G engines. In these environments, consistent spark timing directly affects fuel efficiency, emissions compliance (EPA Tier 4 Final), and cylinder pressure stability under continuous load. A single failed plug can trigger derating or forced idle — making correct specification non-negotiable.
The electrode core uses nickel-chromium alloy with laser-welded center electrode geometry — optimized for 30,000+ km service life in lean-burn gas cycles. The insulator body is alumina ceramic (95% Al₂O₃), rated for continuous operation up to 850°C without thermal cracking. Thread pitch and seat angle match OEM specifications (14 mm × 1.25 mm, 19° tapered seat) to prevent gasket blowout or torque-induced shell deformation. Hex size (16 mm) and reach (19.5 mm) ensure full engagement with factory cylinder head threads — critical for heat transfer and sealing integrity in high-hour ISB5.9G and QSL9 installations.
A $3.50 off-brand spark plug may save pennies upfront — but causes uneven combustion, increased NOx emissions, and accelerated valve train wear in Cummins gas engines. Industry data shows incorrect heat range or gap tolerance leads to 68% higher unplanned cylinder head servicing within 6 months. When factoring labor ($120/hr), diagnostic time, and equipment idle cost ($1,800/day for a QSL9-powered wheel loader), the total cost of ownership (TCO) for low-grade plugs exceeds premium aftermarket parts by 4.2× over 12 months. This Cummins spark plug meets SAE J1330 and ISO 15500-4 standards for ignition components — ensuring long-term reliability without OEM price premiums.
We only source from ISO 9001-certified factories with documented process controls for electrode welding, ceramic sintering, and final assembly. Every shipment undergoes 100% visual inspection and random sampling for spark gap accuracy (±0.05 mm) and insulation resistance (>10 GΩ at 1,000 V DC). All units carry 3–12 month warranty covering material and workmanship defects — no questions asked. With 10 years of export experience serving 120+ countries, our technical team has verified over 8,200 unique Cummins part cross-references. You’ll receive accurate fitment confirmation within 2 hours of submitting your machine model and serial prefix. Our Guangzhou warehouse holds 2,100+ spark plug SKUs in stock — including this 4937472 replacement spark plug for Cummins gas engine — enabling 2–5 working day dispatch on all in-stock orders.
Your excavator or refuse truck isn’t generating revenue while waiting for ignition parts. Send us your engine model (e.g., ISB5.9G CM2180), quantity needed, and destination country — we’ll issue a formal quotation within 24 hours. First-time buyers can request one sample unit for physical verification before placing bulk orders. No registration or account setup required.
Q: Is this an original Cummins part or an aftermarket replacement?
A: This is an OEM-equivalent aftermarket spark plug, produced in ISO 9001-certified factories to meet Cummins engineering specifications for heat range, gap, thread, and dielectric strength.
Q: How do I confirm this fits my specific Cummins engine?
A: Provide your engine model (e.g., QSL9 G CM558) and, if available, the last 4 digits of your engine serial number. Our technical team will verify compatibility and respond within 2 hours.
Q: What is the warranty coverage?
A: 3–12 months against manufacturing defects. If the spark plug fails due to material or workmanship issues, we cover return shipping and replacement at no cost.
Q: What is the minimum order quantity?
A: 1 piece. We support urgent maintenance needs with no MOQ restrictions.
Q: How fast can you ship?
A: In-stock items ship within 2–5 working days. Express courier delivery takes 3–7 days depending on destination.
Q: Can I receive a sample before ordering in bulk?
A: Yes — first-time customers may request one sample unit for physical testing and fitment validation.
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WhatsApp: +86 13316055942 | Email: talos@xunpojx.com
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