/live/media/BS/BS_7403_Fro.jpg)
Will it fit your vehicle?
Confirm before you buy. Free return shipping if it doesn't fit.
Bosch 7403 Spark Plug
| Brand | Bosch 7403 |
|---|---|
| Center Electrode Core Material | Nickel and Copper |
| Center Electrode Tip Material | Nickel |
| Ground Configuration | Multiple |
| Ground Electrode Quantity | 3 |
| Ground Electrode Tip Design | Multiple |
| Ground Electrode Tip Material | Nickel |
| Hex Size | 16 |
| Insulator Material | Ceramic |
| Insulator Type | Non-Projected |
| Manufacturer Heat Range | 5 |
| Outdoor Power Equipment Application | No |
| Package Contents | Spark Plug |
| Pre-Gap Size | .8 |
| Product Length | 2.948819 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 | Porsche · 11 vehicles |
OE-spec design. Engineered to meet or exceed original equipment requirements.
Nickel-copper core. Heavy-duty center electrode helps deliver longer service life.
Multiple ground electrodes. Promotes consistent spark performance in a conventional plug.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Bosch Nickel Spark Plug for Porsche 911
Bosch 7403 is a conventional nickel-copper spark plug built for steady ignition performance and OE-style service life. It uses a heavy-duty yttrium-enhanced nickel center electrode with a copper core, along with a ceramic insulator and resistor design for consistent operation in the ignition system.
Compatible with Porsche 911 applications from 1989-1995, including 1994 Porsche 911 with dual spark plugs and 1995 Porsche 911. The preset gap should not be adjusted on listed applications.
Key Features
- Bosch Nickel line spark plug for secondary ignition service
- Part number 7403
- Nickel center electrode with copper core for durable operation
- Resistor spark plug with 6000 resistance specification
- Multiple ground electrode design with three ground electrodes
- Flat seat, 14 mm thread diameter, 19 mm reach, and 16 mm hex size
- Ceramic insulator with non-projected insulator type
- Pre-gapped at .8 for listed applications
Product Details
Bosch 7403 is a 4-cycle spark plug engineered to meet or exceed original equipment specifications for nickel-copper core spark plugs. The Bosch Nickel product line focuses on conventional ignition service with a nickel center electrode and copper core construction, giving the plug the durability expected in OE-style replacement work. For Porsche 911 owners searching for a Bosch 7403 spark plug, this part matches the listed factory applications and supports direct replacement service on the specified model years.
This part cross-references Bosch 7403 for the same application.
What It Helps Address
- Hard starting caused by worn spark plug electrodes
- Rough idle from inconsistent ignition firing
- Misfire conditions related to aged plugs
- Reduced throttle response from degraded spark delivery
- Service replacement for Porsche 911 ignition maintenance
Installation Notes and Tips
Install Bosch 7403 only on the listed Porsche 911 applications. The gap is preset, so do not gap this plug before installation. Verify the thread diameter, reach, seat type, and heat range match the engine specification before service. Follow the vehicle service manual for torque and ignition system procedures.
Quality Assurance
Bosch designs this Nickel spark plug to meet or exceed OE specifications for nickel-copper core spark plugs. The construction includes a nickel center electrode with copper core, nickel ground electrode tip material, and a ceramic insulator for consistent ignition service.
| Year | Make | Model | Submodel | Drive Type | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 1995 | Porsche | 911 | — | — | 3.6L | H6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; Nickel |
| 1994 | Porsche | 911 | Carrera 2 | — | 3.6L | H6 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Copper/Nickel; Nickel |
| 1994 | Porsche | 911 | — | AWD | 3.6L | H6 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Copper/Nickel; Nickel |
| 1994 | Porsche | 911 | Speedster | — | 3.6L | H6 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Copper/Nickel; Nickel |
| 1994 | Porsche | 911 | RS America | — | 3.6L | H6 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode Material is Copper/Nickel; Nickel |
| 1993 | Porsche | 911 | — | — | 3.6L | H6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; Nickel |
| 1992 | Porsche | 911 | — | — | 3.3L | H6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; Nickel |
| 1992 | Porsche | 911 | — | — | 3.6L | H6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; Nickel |
| 1991 | Porsche | 911 | — | — | 3.6L | H6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; Nickel |
| 1990 | Porsche | 911 | — | — | 3.6L | H6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; Nickel |
| 1989 | Porsche | 911 | — | — | 3.6L | H6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; Nickel |
| No rows match your filter. | ||||||||