Bosch 9748 Spark Plug

Brand	Bosch 9748
Center Electrode Core Material	Nickel-Yttrium and Copper
Center Electrode Tip Material	Platinum-Iridium
Ground Configuration	Standard
Ground Electrode Core Material	Copper
Ground Electrode Quantity	1
Ground Electrode Tip Design	Standard
Ground Electrode Tip Material	Platinum and Nickel-Yttrium and Copper
Hex Size	16
Insulator Material	Ceramic
Insulator Type	Projected
Manufacturer Heat Range	7
Outdoor Power Equipment Application	No
Package Contents	Spark Plug
Pre-Gap Size	.8
Product Length	3.334646 in
Product Width	0.748031 in
Reach	26.5
Resistance	6000
Resistor	Yes
Seat Type	Flat
Short Style	No
Spark Plug Type	4-Cycle
Thread Diameter	14
Product line	OE Fine Wire Iridium
Fits	Dodge, Jeep, and Mitsubishi · 46 vehicles

OE Fine Wire Iridium. Ultra-fine iridium center electrode for strong performance and long service life.

Iridium spark plug. Built with platinum-iridium and ceramic materials for dependable ignition.

4-cycle spark plug with a projected insulator and standard ground design.

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Bosch OE Fine Wire Iridium Spark Plug 9748

Bosch 9748 is an OE Fine Wire Iridium spark plug built for consistent ignition performance and long service life. It uses an ultra-fine iridium center electrode firing pin to support efficient spark delivery in modern 4-cycle engines, including select Dodge Durango, Ram 1500, Dodge Challenger, Dodge Charger, Jeep Grand Cherokee, and Mitsubishi applications.

Key Features

OE Fine Wire Iridium design for OE-style ignition performance
Ultra-fine wire iridium center electrode firing pin
Platinum-iridium center electrode tip material
Projected insulator type for modern combustion chamber designs
Resistor spark plug with 6000 resistance
Preset .8 gap; do not gap before installation where specified
14 mm thread diameter, 16 mm hex size, flat seat
4-cycle spark plug construction for secondary ignition systems

Product Details

The Bosch OE Fine Wire Iridium line focuses on OE-level ignition control with materials selected for durability and stable spark delivery. Bosch 9748 uses a fine-wire iridium center electrode paired with a platinum-iridium tip and a ceramic insulator to support reliable combustion in engines that call for a preset-gap iridium plug. This part number is used across a wide range of applications, including 2021-2023 Ram 1500, 2021-2023 Dodge Durango, 2021-2022 Dodge Challenger, 2021-2022 Dodge Charger, 2021 Jeep Grand Cherokee, and earlier Mitsubishi Eclipse, Galant, Lancer, and Outlander fitments. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Spark Plug Can Address

Rough idle caused by worn ignition electrodes
Hard starting from weakened spark output
Misfire conditions related to aged plugs
Reduced throttle response from inconsistent combustion
Maintenance intervals shortened by standard-plug wear

Installation Notes

Verify engine-specific fitment before installation. Several listed applications require a preset gap and should not be regapped. Use the correct torque procedure for the cylinder head material and confirm the plug seat type, thread diameter, reach, and heat range match the vehicle specification. For fitment examples, this part fits 2021-2023 Ram 1500, N/A; fits 2021-2023 Dodge Durango, N/A; fits 2021-2022 Dodge Charger, N/A; and fits 2004-2012 Mitsubishi Galant, N/A. Additional listed applications include 2004-2006 Mitsubishi Lancer, 2004-2006 Mitsubishi Outlander, 2006-2012 Mitsubishi Eclipse, 2015-2020 Dodge Challenger, 2015-2020 Dodge Charger, 2018-2019 Jeep Grand Cherokee, and 2021 Jeep Grand Cherokee.

Quality Assurance

Bosch manufactures this spark plug as part of its OE Fine Wire Iridium product line, using iridium and platinum-based electrode materials for consistent ignition performance and long-term service in approved applications.

This part fits 46 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Liters	Cylinders	Position	Notes
2023	Dodge	Durango	6.2L	V8	N/A	OE Fine Wire Iridium
2023	Ram	1500	6.2L	V8	N/A	OE Fine Wire Iridium
2022	Dodge	Challenger	6.2L	V8	N/A	OE Fine Wire Iridium
2022	Dodge	Charger	6.2L	V8	N/A	OE Fine Wire Iridium
2022	Ram	1500	6.2L	V8	N/A	OE Fine Wire Iridium
2021	Dodge	Challenger	6.2L	V8	N/A	OE Fine Wire Iridium
2021	Dodge	Charger	6.2L	V8	N/A	OE Fine Wire Iridium
2021	Dodge	Durango	6.2L	V8	N/A	OE Fine Wire Iridium
2021	Jeep	Grand Cherokee	6.2L	V8	N/A	OE Fine Wire Iridium
2021	Ram	1500	6.2L	V8	N/A	OE Fine Wire Iridium
2020	Dodge	Challenger	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2020	Dodge	Charger	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2019	Dodge	Challenger	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2019	Dodge	Charger	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2019	Jeep	Grand Cherokee	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2018	Dodge	Challenger	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2018	Dodge	Charger	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2018	Jeep	Grand Cherokee	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2017	Dodge	Challenger	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2017	Dodge	Charger	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2016	Dodge	Challenger	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2016	Dodge	Charger	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2015	Dodge	Challenger	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2015	Dodge	Charger	6.2L	V8	N/A	Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2012	Mitsubishi	Eclipse	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2012	Mitsubishi	Galant	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2011	Mitsubishi	Eclipse	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2011	Mitsubishi	Galant	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2010	Mitsubishi	Eclipse	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2010	Mitsubishi	Galant	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2009	Mitsubishi	Eclipse	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2009	Mitsubishi	Galant	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2008	Mitsubishi	Eclipse	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2008	Mitsubishi	Galant	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2007	Mitsubishi	Eclipse	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2007	Mitsubishi	Galant	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2006	Mitsubishi	Eclipse	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2006	Mitsubishi	Galant	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2006	Mitsubishi	Lancer	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2006	Mitsubishi	Outlander	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2005	Mitsubishi	Galant	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2005	Mitsubishi	Lancer	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2005	Mitsubishi	Outlander	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2004	Mitsubishi	Galant	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2004	Mitsubishi	Lancer	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
2004	Mitsubishi	Outlander	2.4L	L4	N/A	Do Not Gap, Gap is Preset; Original Center Electrode Material is Iridium; OE Fine Wire Iridium
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