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Bosch 9735 Spark Plug
| Brand | Bosch 9735 |
|---|---|
| Resistance | 6000 |
| Ground Electrode Tip Design | Standard |
| Ground Configuration | J-gap |
| Ground Electrode Core Material | Copper |
| Electrical Terminal Type | Non-removable nut |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Iridium |
| Pre-Gap Size | .7 |
| Ground Electrode Quantity | 1 |
| Hex Size | 16 |
| Manufacturer Heat Range | 6 |
| Seat Type | Flat |
| Reach | 19 |
| Insulator Material | Ceramic |
| Resistor Type | Yes |
| Ground Electrode Tip Material | Platinum |
| Hex Type | Hex |
| Center Electrode Design | Fine wire |
| 9746 | No |
| Additional Accessories Included | No |
| Automotive Item Weight (lbs) | 0.092594 lb |
| Insulator Type | Non-projected |
| Outdoor Power Equipment Application | No |
| Package Contents | Spark plug |
| Package Quantity | 1 |
| Private Brand? | No |
| Product Length | 3 in |
| Product Width | 0.748031 in |
| Resistor | Yes |
| Short Style | No |
| Product line | OE Fine Wire Iridium |
| Fits | Audi, Mitsubishi, and Volkswagen · 43 vehicles |
OE Fine Wire Iridium. Bosch OE-style spark plug technology for strong performance and long service life.
Iridium center electrode. Ultra-fine wire design helps deliver crisp, efficient firing.
Resistor type. Helps reduce electrical noise in the ignition system.
Bosch OE Fine Wire Iridium Spark Plug 9735
Bosch 9735 is an OE Fine Wire Iridium spark plug built for consistent ignition performance and extended service life. It uses an ultra-fine wire iridium center electrode to support efficient firing, stable combustion, and reliable starts in the vehicles listed below.
The Bosch OE Fine Wire Iridium line focuses on original-equipment style ignition performance with a fine-wire electrode design, resistor construction, and a 14 mm thread diameter. For drivers searching for a Bosch spark plug for Audi A8 Quattro, Audi A6 Quattro, Audi S6, Audi S8, Audi Q7, Audi S5, Mitsubishi Eclipse, Mitsubishi Lancer, Mitsubishi Galant, or Volkswagen Touareg, part number 9735 matches the specified applications.
Key Features
- OE Fine Wire Iridium design for precise spark delivery
- Iridium center electrode tip with fine-wire construction
- Platinum ground electrode tip material with standard J-gap configuration
- Resistor spark plug with 6000 resistance
- Flat seat, 16 mm hex, and 19 mm reach
- Ceramic insulator and non-removable nut terminal
- Pre-gapped to .7 for the listed applications
- Bosch part number 9735
Product Details
Bosch 9735 is a 4-cycle spark plug engineered around OE-style ignition requirements. The fine wire iridium center electrode helps concentrate the spark for dependable ignition response, while the resistor design supports electrical noise suppression in modern ignition systems. With a copper core center electrode and copper core ground electrode, this plug is built to manage heat transfer within the specified heat range 6 construction.
This Bosch OE Fine Wire Iridium spark plug is listed for 2006-2012 Mitsubishi Eclipse, 2008-2010 Mitsubishi Lancer, 2007-2009 Mitsubishi Galant, 2007-2012 Audi A8 Quattro, 2007-2011 Audi A6 Quattro, 2007-2011 Audi S6, 2007-2010 Audi Q7, 2007-2009 Audi S8, 2009-2012 Audi S5, and 2007-2009 Volkswagen Touareg. If you are replacing worn plugs on an Audi A8 Quattro or Volkswagen Touareg, Bosch 9735 provides the specified OE Fine Wire Iridium configuration.
Common Issues This Part Can Address
- Hard starting caused by worn spark plug electrodes
- Rough idle from inconsistent ignition firing
- Misfire conditions related to degraded plug performance
- Reduced throttle response from weak spark delivery
- Maintenance replacement for high-mileage ignition service
Installation Notes and Tips
Verify the engine application against the listed fitment before installation. Check the plug gap against the vehicle specification, inspect ignition coils and boots for wear, and confirm the 14 mm thread diameter, 19 mm reach, and flat seat match the cylinder head requirements. Use proper spark plug service procedures to avoid cross-threading or over-tightening.
Quality Assurance
Bosch designs OE Fine Wire Iridium spark plugs to meet original-equipment style ignition standards with durable electrode materials and consistent electrical performance. Part number 9735 is built for the listed Audi, Mitsubishi, and Volkswagen applications and follows Bosch ignition component engineering practices.
| Year | Make | Model | Submodel | Liters | Cylinders | Fuel Type | Notes |
|---|---|---|---|---|---|---|---|
| 2012 | Audi | A8 Quattro | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2012 | Audi | S5 | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2012 | Mitsubishi | Eclipse | — | 3.8L | V6 | — | OE Fine Wire Iridium |
| 2011 | Audi | A6 Quattro | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2011 | Audi | A8 Quattro | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2011 | Audi | S5 | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2011 | Audi | S6 | — | 5.2L | V10 | — | OE Fine Wire Iridium |
| 2011 | Mitsubishi | Eclipse | — | 3.8L | V6 | — | OE Fine Wire Iridium |
| 2010 | Audi | A6 Quattro | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2010 | Audi | A8 Quattro | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2010 | Audi | Q7 | — | 4.2L | V8 | GAS | OE Fine Wire Iridium |
| 2010 | Audi | S5 | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2010 | Audi | S6 | — | 5.2L | V10 | — | OE Fine Wire Iridium |
| 2010 | Mitsubishi | Eclipse | — | 3.8L | V6 | — | OE Fine Wire Iridium |
| 2010 | Mitsubishi | Lancer | — | 2.0L | L4 | — | OE Fine Wire Iridium |
| 2009 | Audi | A6 Quattro | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2009 | Audi | A8 Quattro | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2009 | Audi | Q7 | — | 4.2L | V8 | GAS | OE Fine Wire Iridium |
| 2009 | Audi | S5 | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2009 | Audi | S6 | — | 5.2L | V10 | — | OE Fine Wire Iridium |
| 2009 | Audi | S8 | — | 5.2L | V10 | — | OE Fine Wire Iridium |
| 2009 | Mitsubishi | Eclipse | — | 3.8L | V6 | — | OE Fine Wire Iridium |
| 2009 | Mitsubishi | Galant | — | 3.8L | V6 | — | OE Fine Wire Iridium |
| 2009 | Mitsubishi | Lancer | — | 2.0L | L4 | — | OE Fine Wire Iridium |
| 2009 | Volkswagen | Touareg | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2008 | Audi | A6 Quattro | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2008 | Audi | A8 Quattro | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2008 | Audi | Q7 | — | 4.2L | V8 | GAS | OE Fine Wire Iridium |
| 2008 | Audi | S6 | — | 5.2L | V10 | — | OE Fine Wire Iridium |
| 2008 | Audi | S8 | — | 5.2L | V10 | — | OE Fine Wire Iridium |
| 2008 | Mitsubishi | Eclipse | — | 3.8L | V6 | — | OE Fine Wire Iridium |
| 2008 | Mitsubishi | Galant | — | 3.8L | V6 | — | OE Fine Wire Iridium |
| 2008 | Mitsubishi | Lancer | — | 2.0L | L4 | — | OE Fine Wire Iridium |
| 2008 | Volkswagen | Touareg | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2007 | Audi | A6 Quattro | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2007 | Audi | A8 Quattro | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2007 | Audi | Q7 | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2007 | Audi | S6 | — | 5.2L | V10 | — | OE Fine Wire Iridium |
| 2007 | Audi | S8 | — | 5.2L | V10 | — | OE Fine Wire Iridium |
| 2007 | Mitsubishi | Eclipse | GT | 3.8L | V6 | — | OE Fine Wire Iridium |
| 2007 | Mitsubishi | Galant | — | 3.8L | V6 | — | OE Fine Wire Iridium |
| 2007 | Volkswagen | Touareg | — | 4.2L | V8 | — | OE Fine Wire Iridium |
| 2006 | Mitsubishi | Eclipse | — | 3.8L | V6 | — | OE Fine Wire Iridium |
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