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Bosch
OE Fine Wire Double PlatinumBosch 7426 Spark Plug
| Brand | Bosch 7426 |
|---|---|
| Center Electrode Core Material | Nickel-Yttrium and Copper |
| Center Electrode Tip Material | Platinum |
| Ground Configuration | Standard |
| Ground Electrode Quantity | 1 |
| Ground Electrode Tip Design | Standard |
| Ground Electrode Tip Material | Platinum and Nickel-Yttrium |
| Hex Size | 16 |
| Insulator Material | Ceramic |
| Insulator Type | Non-Projected |
| Manufacturer Heat Range | 7 |
| Outdoor Power Equipment Application | No |
| Package Contents | Spark Plug |
| Pre-Gap Size | .7 |
| Product Length | 2.996063 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 | OE Fine Wire Double Platinum |
| Fits | Audi, Bentley, Volkswagen, and Mitsubishi · 71 vehicles |
OE fine-wire double platinum. Meets original equipment specs for dependable spark plug performance.
Platinum electrodes. Helps reduce gap erosion for longer service life.
Ceramic insulator. Supports stable ignition performance under heat and stress.
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Bosch OE Fine Wire Double Platinum Spark Plug
Bosch 7426 is an OE Fine Wire Double Platinum spark plug built for direct replacement service in select Audi, Volkswagen, Bentley, and Mitsubishi applications. It uses platinum on the center electrode and a platinum inlay on the ground electrode to help reduce gap erosion and maintain stable ignition performance over time.
The preset gap and OE-style construction make this Bosch spark plug a practical choice for drivers servicing 2000-2006 Audi A4, 2000-2006 Audi TT, 1999-2005 Volkswagen Beetle, and other listed applications that call for a double platinum design.
Key Features
- OE Fine Wire Double Platinum design for long service life
- Platinum center electrode tip with platinum ground electrode inlay
- Preset .7 gap; do not gap before installation
- Resistor spark plug with 6000 resistance
- Flat seat, 14 mm thread diameter, 19 mm reach
- Ceramic insulator with non-projected tip style
- Designed for 4-cycle ignition systems
- Bosch part number 7426
Product Details
Bosch’s OE Fine Wire Double Platinum line focuses on maintaining original-equipment-style ignition performance while improving durability at the electrode surfaces. The fine-wire platinum center electrode and platinum-enhanced ground electrode help control wear, which is important in engines that rely on consistent spark quality under daily driving conditions. Bosch 7426 is a direct-fit spark plug for select Audi A4, Audi TT, Audi TT Quattro, Audi A4 Quattro, Audi Allroad Quattro, Volkswagen Golf, Volkswagen Jetta, Volkswagen Passat, Volkswagen Beetle, Bentley Continental, and Mitsubishi Eclipse applications listed in the fitment data.
This Bosch 7426 spark plug is built with a nickel-yttrium and copper core, ceramic insulator, standard ground configuration, and a manufacturer heat range of 7. It is a fitment-specific ignition component for vehicles that specify a flat-seat, 14 mm, 19 mm reach plug with a preset gap.
Common Issues This Part Can Address
- Misfire caused by worn or eroded spark plug electrodes
- Hard starting from weakened ignition output
- Rough idle related to inconsistent spark delivery
- Reduced fuel economy from degraded plug performance
- Loss of throttle response in high-mileage ignition service intervals
Installation Notes and Tips
Verify engine application before installation and follow the vehicle service specification for plug type and torque. Bosch 7426 is preset from the factory, so do not adjust the gap. Clean the plug wells before removal and installation to help prevent debris from entering the cylinder head. For Audi A4, Audi TT, Volkswagen Jetta, and Volkswagen Passat applications, confirm the engine code and OE plug specification match the listed fitment.
Use this spark plug only where the vehicle calls for a double platinum, flat-seat plug with the listed reach and thread size. If replacing plugs on a higher-mileage engine, inspect ignition coils and boots at the same time to confirm the rest of the secondary ignition system is in good condition.
Quality Assurance
Bosch designs this spark plug to meet original equipment specifications for double platinum applications. The OE Fine Wire Double Platinum construction is intended to deliver consistent ignition performance and extended electrode durability in the specified Audi, Volkswagen, Bentley, and Mitsubishi fitments.
This part fits 71 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
| Year | Make | Model | Submodel | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2006 | Audi | A4 | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2006 | Audi | TT | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2006 | Audi | TT Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2006 | Bentley | Continental | Flying Spur | 6.0L | W12 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2006 | Volkswagen | Golf | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2005 | Audi | A4 | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2005 | Audi | A4 Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2005 | Audi | Allroad Quattro | — | 2.7L | V6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2005 | Audi | TT | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2005 | Audi | TT Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2005 | Volkswagen | Beetle | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2005 | Volkswagen | Golf | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2005 | Volkswagen | Jetta | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2005 | Volkswagen | Passat | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2004 | Audi | A4 | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2004 | Audi | A4 Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2004 | Audi | A6 Quattro | — | 2.7L | V6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2004 | Audi | Allroad Quattro | — | 2.7L | V6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2004 | Audi | TT | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2004 | Audi | TT Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2004 | Volkswagen | Beetle | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2004 | Volkswagen | Golf | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2004 | Volkswagen | Jetta | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2004 | Volkswagen | Passat | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2003 | Audi | A4 | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2003 | Audi | A4 Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2003 | Audi | A6 Quattro | — | 2.7L | V6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2003 | Audi | Allroad Quattro | — | 2.7L | V6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2003 | Audi | TT | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2003 | Audi | TT Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2003 | Mitsubishi | Eclipse | — | 3.0L | V6 | N/A | Do Not Gap, Gap is Preset; For City Driving; Original Center Electrode Material is Iridium; OE Fine Wire Double Platinum |
| 2003 | Volkswagen | Beetle | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2003 | Volkswagen | Golf | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2003 | Volkswagen | Jetta | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2003 | Volkswagen | Passat | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2002 | Audi | A4 | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2002 | Audi | A4 Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2002 | Audi | A6 Quattro | — | 2.7L | V6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2002 | Audi | Allroad Quattro | — | 2.7L | V6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2002 | Audi | S4 | — | 2.7L | V6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2002 | Audi | TT | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2002 | Audi | TT Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2002 | Mitsubishi | Eclipse | — | 3.0L | V6 | N/A | Do Not Gap, Gap is Preset; For City Driving; Original Center Electrode Material is Iridium; OE Fine Wire Double Platinum |
| 2002 | Volkswagen | Beetle | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2002 | Volkswagen | Golf | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2002 | Volkswagen | Jetta | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2002 | Volkswagen | Passat | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2001 | Audi | A4 | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2001 | Audi | A4 Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2001 | Audi | A6 Quattro | — | 2.7L | V6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2001 | Audi | Allroad Quattro | — | 2.7L | V6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2001 | Audi | TT | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2001 | Audi | TT Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2001 | Volkswagen | Beetle | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2001 | Volkswagen | Golf | — | 2.0L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2001 | Volkswagen | Golf | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2001 | Volkswagen | Jetta | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2001 | Volkswagen | Passat | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2000 | Audi | A4 | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2000 | Audi | A4 Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2000 | Audi | A6 Quattro | — | 2.7L | V6 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2000 | Audi | TT | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2000 | Audi | TT Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2000 | Volkswagen | Beetle | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2000 | Volkswagen | Golf | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2000 | Volkswagen | Golf | — | 2.0L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2000 | Volkswagen | Jetta | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2000 | Volkswagen | Passat | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 1999 | Audi | A4 Quattro | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 1999 | Volkswagen | Beetle | — | 1.8L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 1999 | Volkswagen | Golf | — | 2.0L | L4 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
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