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Bosch
OE Fine Wire Double IridiumBosch 9661 Spark Plug
| Brand | Bosch 9661 |
|---|---|
| Center Electrode Core Material | Nickel-Yttrium and Copper |
| Center Electrode Tip Material | Iridium |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Copper |
| Ground Electrode Quantity | 1 |
| Ground Electrode Tip Design | Tapered |
| Ground Electrode Tip Material | Platinum-Iridium and Nickel-Yttrium and Copper |
| Hex Size | 16 |
| Insulator Material | Ceramic |
| Insulator Type | Projected |
| Manufacturer Heat Range | 8 |
| Outdoor Power Equipment Application | No |
| Package Contents | Spark Plug |
| Pre-Gap Size | 1.3 |
| Product Length | 3.576772 in |
| Product Width | 0.712598 in |
| Reach | 25 |
| Resistance | 6000 |
| Resistor | Yes |
| Seat Type | Tapered |
| Short Style | No |
| Spark Plug Type | 4-Cycle |
| Thread Diameter | 14 |
| Product line | OE Fine Wire Double Iridium |
| Fits | Jeep, Chrysler, Dodge, and Volkswagen · 63 vehicles |
OE Fine Wire Double Iridium. Engineered for strong ignitability and long service life.
Ultra fine wire design. Helps deliver quick, consistent spark performance.
Laser-welded electrodes. Built to withstand heat and extend durability.
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Bosch OE Fine Wire Double Iridium Spark Plug 9661
Bosch OE Fine Wire Double Iridium spark plug 9661 is built for drivers who need precise ignition performance and extended service life. Its fine-wire iridium center electrode and laser-welded ground electrode are engineered for strong ignitability, stable combustion, and consistent operation in demanding daily driving conditions.
This Bosch OE Fine Wire Double Iridium line focuses on OE-style fit and durable electrode construction for modern ignition systems. The tapered ground electrode design and projected insulator help support efficient spark delivery, while the resistor design helps control electrical noise in the ignition circuit.
Key Features
- Fine-wire double iridium design for high ignitability and long wear life
- Laser-welded tapered ground electrode for consistent spark exposure
- Iridium-alloy center electrode firing pin for durable performance
- Resistor spark plug design with 6000 ohms resistance
- Projected ceramic insulator for OE-style combustion chamber placement
- 14 mm thread diameter, 25 mm reach, 16 mm hex size
- Preset 1.3 mm gap; do not gap before installation
Detailed Description
Bosch part number 9661 is an OE Fine Wire Double Iridium spark plug designed for 4-cycle ignition systems that call for a tapered seat and preset gap. The iridium center electrode and iridium-inlay ground electrode are selected to maintain sharp spark characteristics over time, while the copper-core construction supports heat transfer. This makes it a practical choice for Chrysler Town & Country, Dodge Grand Caravan, Dodge Caravan, Jeep Wrangler, Chrysler Pacifica, Chrysler Voyager, and Volkswagen Routan applications listed below. If you are searching for a Bosch 9661 spark plug for a Jeep Wrangler or a Bosch 9661 replacement for a Dodge Grand Caravan, this part matches the specified OE-style requirements.
Fits 2011 Jeep Wrangler, N/A. Fits 2007-2008 Jeep Wrangler, N/A. Fits 2009-2010 Jeep Wrangler, N/A. Fits 2001-2010 Chrysler Town & Country, N/A. Fits 2001-2010 Dodge Grand Caravan, N/A. Fits 2009-2010 Volkswagen Routan, N/A. Fits 2007-2008 Chrysler Pacifica, N/A. Fits 2005 Chrysler Pacifica, N/A. Fits 2006 Chrysler Pacifica, N/A. Fits 2001-2007 Dodge Caravan, N/A. Fits 2001-2003 Chrysler Voyager, N/A.
This part cross-references standard OE-style spark plug applications for the same vehicle coverage.
What It Helps Address
- Hard starting caused by worn spark plug electrodes
- Misfire symptoms from weak or inconsistent spark output
- Rough idle related to degraded ignition performance
- Reduced throttle response from inefficient combustion
- Ignition noise concerns in resistor-equipped systems
Installation Notes and Tips
Verify the engine calls for a tapered-seat, preset-gap spark plug before installation. Do not adjust the gap on this plug; the factory gap is preset. Confirm the thread diameter, reach, hex size, and heat range match the vehicle specification, and follow the service manual torque procedure for the engine.
Quality Assurance
Bosch OE Fine Wire Double Iridium plugs are built around OE-style engineering with laser-welded electrode construction and iridium-alloy materials for durability and stable ignition performance. Part number 9661 is designed to meet the fitment and specification requirements listed for the covered Chrysler, Dodge, Jeep, and Volkswagen applications.
This part fits 63 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
| Year | Make | Model | Drive Type | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2011 | Jeep | Wrangler | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2010 | Chrysler | Town & Country | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2010 | Chrysler | Town & Country | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2010 | Dodge | Grand Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2010 | Dodge | Grand Caravan | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2010 | Jeep | Wrangler | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Double Iridium |
| 2010 | Volkswagen | Routan | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2009 | Chrysler | Town & Country | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2009 | Chrysler | Town & Country | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2009 | Dodge | Grand Caravan | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2009 | Dodge | Grand Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2009 | Jeep | Wrangler | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Copper/Nickel; OE Fine Wire Double Iridium |
| 2009 | Volkswagen | Routan | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2008 | Chrysler | Pacifica | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2008 | Chrysler | Town & Country | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2008 | Chrysler | Town & Country | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2008 | Dodge | Grand Caravan | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2008 | Dodge | Grand Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2008 | Jeep | Wrangler | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2007 | Chrysler | Pacifica | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2007 | Chrysler | Town & Country | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2007 | Chrysler | Town & Country | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2007 | Dodge | Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2007 | Dodge | Grand Caravan | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2007 | Dodge | Grand Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2007 | Jeep | Wrangler | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2006 | Chrysler | Pacifica | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; OE Fine Wire Double Iridium |
| 2006 | Chrysler | Town & Country | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2006 | Chrysler | Town & Country | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2006 | Dodge | Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2006 | Dodge | Grand Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2006 | Dodge | Grand Caravan | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2005 | Chrysler | Pacifica | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2005 | Chrysler | Town & Country | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2005 | Chrysler | Town & Country | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2005 | Dodge | Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2005 | Dodge | Grand Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2005 | Dodge | Grand Caravan | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2004 | Chrysler | Town & Country | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2004 | Chrysler | Town & Country | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2004 | Dodge | Caravan | — | 3.3L | V6 | GAS | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2004 | Dodge | Grand Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2004 | Dodge | Grand Caravan | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2003 | Chrysler | Town & Country | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2003 | Chrysler | Town & Country | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2003 | Chrysler | Voyager | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2003 | Dodge | Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2003 | Dodge | Caravan | — | 3.3L | V6 | GAS | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2003 | Dodge | Grand Caravan | AWD | 3.3L | V6 | GAS | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2003 | Dodge | Grand Caravan | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2003 | Dodge | Grand Caravan | — | 3.3L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2002 | Chrysler | Town & Country | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2002 | Chrysler | Town & Country | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2002 | Chrysler | Voyager | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2002 | Dodge | Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2002 | Dodge | Grand Caravan | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2002 | Dodge | Grand Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2001 | Chrysler | Town & Country | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2001 | Chrysler | Town & Country | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2001 | Chrysler | Voyager | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2001 | Dodge | Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2001 | Dodge | Grand Caravan | — | 3.8L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
| 2001 | Dodge | Grand Caravan | — | 3.3L | V6 | — | N/A | Do Not Gap, Gap is Preset; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Iridium |
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