The 2018 Ram 4000 has 12 ignition parts with verified fitment on this page — 4 part types and 5 brands, covering the 5.7L V8 engine. Each part includes a manufacturer part number and application notes.
The ignition system on the 2018 Ram 4000 delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. The largest groups are Ignition Coil (4 parts), Spark Plug (4 parts) and Camshaft Position Sensor (2 parts). The other 1 part type covers the remaining 2 parts.
The 2018 Ram 4000 came with a single engine, the 5.7L V8, and every part is verified against it.
5 brands supply ignition parts for the 2018 Ram 4000, led by WALKER PRODUCTS (4 parts), NGK (4 parts) and SPECTRA PREMIUM (2 parts), plus 2 more brands. Quality grades include Standard Replacement, Economy and Iridium.
Each part number listed for the 2018 Ram 4000 opens a page with every vehicle that part fits.
Camshaft Position Sensor
Full Service Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS | 23591288 | 🇲🇽 MX | Full Service Kit | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS | 2351288 | 🇲🇽 MX | Sensor Only | View on Amazon |
This table covers the sensors that report camshaft position to the ECU. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor.
2 Camshaft Position Sensor parts for the 2018 Ram 4000 come from WALKER PRODUCTS.
The Full Service Kit section lists 1 option from WALKER PRODUCTS — grouped under the catalog's "Full Service Kit" designation — the notes column spells out what sets them apart. WALKER PRODUCTS 23591288 is listed in this group.
In the Standard Replacement grade, WALKER PRODUCTS supplies 1 part: built to original-equipment specification. A representative part number is WALKER PRODUCTS 2351288.
This group includes WALKER PRODUCTS 23591288 and WALKER PRODUCTS 2351288.
Crankshaft Position Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SPECTRA PREMIUM | S10399 | 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS | 2351666 | 🇲🇽 MX | Sensor Only | View on Amazon |
This table covers the sensors that report crankshaft position and engine speed. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor.
2 Crankshaft Position Sensor parts for the 2018 Ram 4000 come from 2 brands — SPECTRA PREMIUM and WALKER PRODUCTS.
The Economy section lists 1 option from SPECTRA PREMIUM — the catalog's value-priced group. SPECTRA PREMIUM S10399 is listed in this group.
Standard Replacement: 1 part, from WALKER PRODUCTS. A representative part number is WALKER PRODUCTS 2351666.
This group includes SPECTRA PREMIUM S10399 and WALKER PRODUCTS 2351666.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2IGC0173 | 🇲🇽 MX | View on Amazon | |
| SPECTRA PREMIUM | C693 | 🇲🇽 MX | Ignition Coil Mounts to Cylinder Head | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UNITED MOTOR PRODUCTS | COP107 | 🇲🇽 MX | View on Amazon | |
| WALKER PRODUCTS | 9212093 | 🇲🇽 MX | Single Coil | View on Amazon |
This table covers the coils that fire each spark plug. Typical signs include a misfire that follows one cylinder, a snap in damp weather, or a coil that is swollen or cracked. Swap a suspect coil with a neighbor to confirm, then replace boots that tore on the way off.
4 Ignition Coil parts for the 2018 Ram 4000 come from 4 brands — HOLSTEIN, SPECTRA PREMIUM, UNITED MOTOR PRODUCTS and 1 other brand.
The Economy section: 2 options from HOLSTEIN and SPECTRA PREMIUM. HOLSTEIN 2IGC0173 is listed in this group.
Standard Replacement: 2 parts, from UNITED MOTOR PRODUCTS and WALKER PRODUCTS. A representative part number is UNITED MOTOR PRODUCTS COP107.
Listed part numbers: HOLSTEIN 2IGC0173, SPECTRA PREMIUM C693 and UNITED MOTOR PRODUCTS COP107, plus the other parts above.
Spark Plug
Copper / Nickel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK | 92174 | 🇲🇽 MX | StandardPre-Set Gap: 0.044" | View on Amazon |
Iridium (lasts up to 4x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK | 4469 | 🇲🇽 MX | Iridium IXPre-Set Gap: 0.044" | View on Amazon |
| NGK | 92145 | 🇲🇽 MX | Laser IridiumPre-Set Gap: 0.044" | View on Amazon |
Platinum (lasts up to 2x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK | 5018 | 🇲🇽 MX | G-PowerPre-Set Gap: 0.040" | View on Amazon |
This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine.
NGK supplies the 4 Spark Plug parts for the 2018 Ram 4000.
In the Copper / Nickel grade, NGK supplies 1 part: grouped under the catalog's "Copper / Nickel" designation — the notes column spells out what sets them apart. A representative part number is NGK 92174.
The Iridium (lasts up to 4x longer than Copper / Nickel) section lists 2 options from NGK — grouped under the catalog's "Iridium (lasts up to 4x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. NGK 4469 is listed in this group.
In the Platinum (lasts up to 2x longer than Copper / Nickel) grade, NGK supplies 1 part: grouped under the catalog's "Platinum (lasts up to 2x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is NGK 5018.
Part numbers include NGK 92174, NGK 4469 and NGK 92145, among others listed above.
Buying Ignition Parts for a 2018 Ram 4000
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Confirm you have the 5.7L V8 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Ignition Coil and Spark Plug .
Frequently Asked Questions
How many ignition parts fit the 2018 Ram 4000?
Our catalog currently lists 12 ignition parts for the 2018 Ram 4000 across 4 subcategories and 5 brands, covering the 5.7L V8 engine. Each part is matched to the engine(s) it fits.
What are the signs of ignition problems on a 2018 Ram 4000?
Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What spark-plug gap is listed for the 2018 Ram 4000?
Notes on this page include pre-set gaps of 0.040" and 0.044". Still verify against spec — even “pre-gapped” plugs should be checked before they go in.
What should I replace at the same time?
Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2018 Ram 4000 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2018 Ram 4000?
Every part on this page is matched to the 5.7L V8 engine. Then gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2018 Ram 4000
Ignition Parts for Other Ram 4000 Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.