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Autolite
Iridium XP Spark PlugAutolite XP6003 Spark Plug
| Brand | Autolite XP6003 |
|---|---|
| Resistance | 4000 |
| Ground Electrode Tip Design | Taper cut |
| 11589 | Metric |
| Ground Electrode Core Material | Nickel |
| Washer Included | Yes |
| Grade Type | Performance |
| Electrical Terminal Type | Non-removable nut |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Iridium |
| Pre-Gap Size | 0.04 |
| Pre-Gap Size | 1 |
| Ground Electrode Quantity | 1 |
| Hex Size | 5/8 |
| Insulator Height | 2.008 |
| Insulator Height | 51 |
| Manufacturer Heat Range | 10 |
| Seat Type | Flat |
| Reach | 1.043 |
| Reach | 26 |
| Insulator Material | Ceramic |
| Resistor Type | Yes |
| Thread Size | M14 - 1.25 |
| Ground Electrode Tip Material | Platinum |
| Skirt | Yes |
| Center Electrode Insulator Tip Projection | 0.23 |
| Center Electrode Insulator Tip Projection | 5.8 |
| Hex Type | Hex |
| Center Electrode Design | Fine wire |
| 9745 | Crush |
| 9746 | No |
| Product line | Iridium XP Spark Plug |
| Fits | Chrysler, Dodge, Jeep, and Ram · 66 vehicles |
Iridium XP design. Fine-wire center electrode and platinum ground electrode support stable ignition.
Performance grade. Built for efficient combustion, stronger acceleration, and consistent engine response.
OE-style replacement. Cataloged for supported applications with flat seat and M14 x 1.25 threads.
Cross-references AMS Automotive 4703, Anchor 3417 and Anchor 3433 for the same application. See all 18.
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Iridium Performance Spark Plug
Autolite XP6003 is an iridium spark plug built for performance-focused ignition service. It uses a fine-wire iridium center electrode, a platinum ground electrode, and a tapered ground wire to support efficient combustion and consistent ignitability.
Compatible with select Ram, Dodge, Chrysler, and Jeep applications, this spark plug is a fitment-based replacement for engines that call for the Autolite XP6003 part number. The OE-style design and 0.040 in. pre-gap help keep service straightforward on supported applications.
Key Features
- Iridium center electrode for durable spark delivery
- Platinum ground electrode with tapered tip design
- Fine-wire electrode construction for efficient ignition
- Resistor design with 4,000 ohm resistance
- Flat seat, M14 x 1.25 thread, and 1.043 in. reach
- Autolite XP6003 part number for direct catalog matching
Product Details
The Autolite Iridium XP line focuses on ignition efficiency through a fine-wire center electrode and a platinum-enhanced ground electrode. That combination is intended to improve spark consistency while supporting fuel efficiency, acceleration, and engine response. The ceramic insulator, copper core, and projected tip design further support stable operation in demanding ignition systems. For buyers searching for a Ram 2500 spark plug, Ram 3500 spark plug, or Jeep Grand Cherokee spark plug, XP6003 provides a catalog-specific replacement option.
This part cross-references Bosch FR8TI332 and NGK 96779 for the same application.
Used For
- Replacing worn spark plugs that cause rough idle
- Restoring weak ignition performance and misfire conditions
- Addressing hard starting from degraded spark delivery
- Supporting fuel economy loss tied to ignition wear
- Maintaining consistent combustion in service intervals
Installation Notes
Verify engine application, thread size, reach, seat type, and pre-gap before installation. This spark plug uses a flat seat, non-removable nut terminal, and washer-style design. Fitment notes list OE-style applications and, on some Ram models, require two plugs per cylinder; follow the vehicle service information for the exact engine configuration and gap specification.
Quality Assurance
Autolite designs the Iridium XP series with an iridium-enhanced fine-wire center electrode and a platinum ground electrode to support durability and stable ignition performance. Part number XP6003 is cataloged for fitment-specific replacement use across supported Ram, Dodge, Chrysler, and Jeep applications.
This part fits 66 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
| Year | Make | Model | Submodel | Liters | Cylinders | Notes |
|---|---|---|---|---|---|---|
| 2025 | Ram | 2500 | — | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2025 | Ram | 3500 | — | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2024 | Ram | 2500 | Big Horn | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2024 | Ram | 3500 | — | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2024 | Ram | 4500 | — | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2024 | Ram | 5500 | — | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2023 | Ram | 2500 | Big Horn | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2023 | Ram | 3500 | — | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2023 | Ram | 4500 | — | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2023 | Ram | 5500 | — | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2022 | Ram | 2500 | Big Horn | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2022 | Ram | 3500 | Big Horn | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2022 | Ram | 4500 | — | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2022 | Ram | 5500 | — | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2021 | Ram | 2500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2021 | Ram | 3500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2021 | Ram | 4500 | — | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2021 | Ram | 5500 | — | 6.4L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2020 | Ram | 2500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2020 | Ram | 3500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2020 | Ram | 4500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2020 | Ram | 5500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2019 | Ram | 2500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2019 | Ram | 3500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2019 | Ram | 4500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2019 | Ram | 5500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2018 | Ram | 2500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2018 | Ram | 3500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2018 | Ram | 4500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2018 | Ram | 5500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2017 | Ram | 2500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2017 | Ram | 3500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2017 | Ram | 4500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2017 | Ram | 5500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2016 | Ram | 2500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2016 | Ram | 3500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2016 | Ram | 4500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2016 | Ram | 5500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2015 | Ram | 2500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2015 | Ram | 3500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2015 | Ram | 4500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2015 | Ram | 5500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2014 | Ram | 2500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2014 | Ram | 3500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2014 | Ram | 4500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2014 | Ram | 5500 | — | 6.4L | V8 | Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .043"/1.1mm; OE Style; Iridium Spark Plug |
| 2013 | Ram | 1500 | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2013 | Ram | 2500 | — | 4.7L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2012 | Ram | 1500 | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2012 | Ram | 2500 | — | 4.7L | V8 | 2 Plugs Per Cylinder Required; Iridium XP Spark Plug |
| 2011 | Ram | 1500 | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2011 | Ram | Dakota | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2010 | Dodge | Dakota | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2010 | Dodge | Ram 1500 | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2009 | Chrysler | Aspen | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2009 | Dodge | Dakota | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2009 | Dodge | Durango | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2009 | Dodge | Ram 1500 | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2009 | Jeep | Commander | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2009 | Jeep | Grand Cherokee | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2008 | Chrysler | Aspen | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2008 | Dodge | Dakota | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2008 | Dodge | Durango | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2008 | Dodge | Ram 1500 | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2008 | Jeep | Commander | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| 2008 | Jeep | Grand Cherokee | — | 4.7L | V8 | Exhaust; Iridium Enhanced Center Electrode. Proprietary V-trimmed Platinum side wire. 0.6mm finewire design.; Requires 2 Plugs Per Cylinder; .040"/1.0mm; OE Style; Iridium Spark Plug |
| No rows match your filter. | ||||||
Directly replaces or cross-references 18 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AMS Automotive — 4703Anchor — 3417Anchor — 3433Anchor — 9746Bosch — FR8TI332DENSO Auto Parts — 4704DENSO Auto Parts — 5343DENSO Auto Parts — 5344Mopar — SP138239ACMopar — SPFR8TI332NGK — 967795149888AA68138239ACLFR5AIX-11LZFR5CI-11REC12WMPB5SPFR8I1332SPFR8T1332