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Bosch 79003 Spark Plug
| Brand | Bosch 79003 |
|---|---|
| Center Electrode Core Material | Nickel-Yttrium and Copper |
| Center Electrode Tip Material | Nickel-Yttrium |
| Ground Configuration | Multiple |
| Ground Electrode Quantity | 3 |
| Ground Electrode Tip Design | Standard |
| Ground Electrode Tip Material | Nickel |
| Hex Size | 16 |
| Insulator Material | Ceramic |
| Insulator Type | Non-Projected |
| Manufacturer Heat Range | 8 |
| Outdoor Power Equipment Application | No |
| Package Contents | Spark Plug |
| Pre-Gap Size | 1 |
| Previously cataloged as # | 79081 |
| Product Length | 2.96063 in |
| Product Width | 0.748031 in |
| Reach | 19 |
| Resistance | 6000 |
| Resistor | Yes |
| Seat Type | Flat |
| Short Style | No |
| Spark Plug Type | 4-Cycle |
| Thread Diameter | 14 |
| Product line | Nickel |
| Fits | Mercedes-Benz · 3 vehicles |
OE-spec design. Engineered to meet or exceed original equipment requirements.
Nickel-copper core. Yttrium-enhanced center electrode helps extend service life.
Multiple ground electrodes. Promotes consistent ignition performance.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Bosch Nickel Spark Plug for OE-Style Ignition
Bosch 79003 is a conventional nickel-copper spark plug built for steady ignition performance and value. It uses a yttrium-enhanced nickel center electrode with a copper core, and the preset gap should not be adjusted during installation.
Compatible with 1998 Mercedes-Benz C230 and 1998-1999 Mercedes-Benz S320, this Bosch Nickel spark plug is engineered to meet or exceed original equipment specifications for nickel-copper core spark plugs. The resistor design, ceramic insulator, and flat seat construction support consistent secondary ignition performance in the correct application.
Key Features
- Bosch part number 79003
- Conventional nickel-copper spark plug design
- Nickel-yttrium center electrode with copper core
- Resistor spark plug with 6000 resistance
- Standard ground electrode tip design with multiple ground configuration
- Preset gap; do not gap before installation
- Flat seat, 14 mm thread diameter, 19 mm reach
- Compatible with Mercedes-Benz C230 and Mercedes-Benz S320 applications listed below
Detailed Description
Bosch 79003 is part of the Bosch Nickel line, a conventional spark plug family focused on OE-style fit and dependable ignition service. The nickel-yttrium center electrode and copper core are selected to provide a durable copper-core spark plug construction, while the nickel ground electrode tip and ceramic insulator support stable operation in the specified engine applications. For buyers searching for a Bosch 79003 spark plug for Mercedes-Benz C230 or Bosch 79003 spark plug for Mercedes-Benz S320, this part matches the listed fitment and factory-style specifications.
This spark plug is a direct fit for 1998 Mercedes-Benz C230 and 1998-1999 Mercedes-Benz S320, Position N/A. It previously cataloged as 79081.
What It Helps Address
- Engine misfire caused by worn spark plug electrodes
- Hard starting from degraded ignition output
- Rough idle related to inconsistent spark delivery
- Reduced combustion efficiency from aged plugs
- Service replacement for OE-style nickel-copper spark plug applications
Installation Notes and Tips
Verify the engine application before installation and confirm the plug matches the listed thread diameter, reach, seat type, and heat range. The gap is preset, so do not adjust it. Follow the vehicle service procedure for torque and removal to avoid damage to the cylinder head or plug threads.
Fits 1998 Mercedes-Benz C230, N/A. Fits 1998-1999 Mercedes-Benz S320, N/A.
Quality Assurance
Bosch designs this Nickel spark plug to meet or exceed original equipment specifications for nickel-copper core spark plugs. The OE-style construction and application-specific fitment support reliable service in the listed Mercedes-Benz models.
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1999 | Mercedes-Benz | S320 | 3.2L | L6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; Nickel |
| 1998 | Mercedes-Benz | C230 | 2.3L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; Nickel |
| 1998 | Mercedes-Benz | S320 | 3.2L | L6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; Nickel |
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