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Bosch
OE Fine Wire Double PlatinumBosch 8171 Spark Plug
| Brand | Bosch 8171 |
|---|---|
| Resistance | 6000 |
| Ground Electrode Tip Design | Standard |
| Ground Configuration | Standard |
| Center Electrode Tip Material | Platinum |
| Pre-Gap Size | 1.1 |
| Ground Electrode Quantity | 1 |
| Hex Size | 16 |
| Manufacturer Heat Range | 6 |
| Seat Type | Tapered |
| Reach | 25 |
| Thread Diameter | 14 |
| Center Electrode Core Material | Nickel-yttrium and copper |
| Ground Electrode Tip Material | Platinum and nickel-yttrium |
| Insulator Material | Ceramic |
| Insulator Type | Non-projected |
| Outdoor Power Equipment Application | No |
| Package Contents | Spark plug |
| Package Quantity | 1 |
| Product Length | 3.293307 in |
| Product Width | 0.712598 in |
| Resistor | Yes |
| Short Style | No |
| Spark Plug Type | 4-cycle |
| Product line | OE Fine Wire Double Platinum |
| Fits | Ford · 76 vehicles |
OE fine-wire design. Meets original equipment specifications for double platinum spark plugs.
Double platinum electrodes. Platinum on both electrodes helps reduce gap erosion and extend service life.
Ceramic insulator. Supports stable ignition performance in a 4-cycle spark plug.
$12.48Free shipping
In stock · usually ships same day before 1pm CST
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Bosch OE Fine Wire Double Platinum Spark Plug
Bosch 8171 is an OE Fine Wire Double Platinum spark plug built for direct replacement service in select Ford applications. It uses platinum on the center electrode and a platinum inlay on the ground electrode to help reduce gap erosion and maintain stable performance over time.
Compatible With Ford F-150, Mustang, Super Duty, and Transit models listed below, Bosch 8171 supports OE-style ignition performance with a preset gap and resistor design.
Key Features
- Double platinum construction for improved wear resistance
- Platinum center electrode tip with platinum ground electrode inlay
- Preset 1.1 mm gap; do not gap before installation where specified
- Resistor spark plug with 6000 ohm resistance
- Tapered seat, 14 mm thread diameter, 25 mm reach
- Ceramic insulator with nickel-yttrium and copper core materials
- OE Fine Wire Double Platinum line for factory-style ignition service
Product Details
Bosch OE Fine Wire Double Platinum 8171 is engineered around OE spark plug specifications for vehicles that call for a double platinum design. The fine-wire platinum center electrode and platinum-enhanced ground electrode help control erosion at the firing surfaces, which supports consistent spark delivery and long service life in normal ignition system operation. This spark plug is a 4-cycle, non-projected, tapered-seat design with a 16 mm hex size and manufacturer heat range 6.
The Bosch OE Fine Wire Double Platinum line focuses on factory-equivalent fit and ignition characteristics for modern engines that require precise plug geometry. For Ford F-150, Ford Mustang, Ford F-250 Super Duty, Ford F-350 Super Duty, and Ford Transit applications, Bosch 8171 is a direct replacement option when the vehicle calls for this OE-style double platinum configuration.
Common Issues This Spark Plug Can Address
- Rough idle caused by worn plug electrodes
- Misfire conditions related to excessive gap erosion
- Hard starting from degraded ignition performance
- Reduced fuel economy from inconsistent spark delivery
- Loss of throttle response due to aging spark plugs
Installation Notes
- Verify engine application and match the listed fitment before installation.
- Use the preset gap as supplied; do not adjust unless the service information for your engine specifically calls for it.
- Inspect ignition coils, boots, and plug wells during service to avoid repeat misfire concerns.
- Follow the vehicle manufacturer’s torque specification for tapered-seat spark plugs.
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 durability in the listed Ford vehicles, including 2021-2026 Ford E-350 Super Duty, 2023-2026 Ford F-250 Super Duty, 2023-2026 Ford F-350 Super Duty, 2021-2026 Ford Mustang, and 2023-2026 Ford Transit models. Part number 8171 is a direct OE-style service replacement for these applications.
This part fits 76 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
| Year | Make | Model | Submodel | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2026 | Ford | E-350 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2026 | Ford | F-250 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2026 | Ford | F-350 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2026 | Ford | Mustang | — | 5.0L | V8 | N/A | OE Fine Wire Double Platinum |
| 2026 | Ford | Transit-150 | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2026 | Ford | Transit-250 | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2026 | Ford | Transit-350 | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2026 | Ford | Transit-350 HD | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2025 | Ford | E-350 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2025 | Ford | F-250 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2025 | Ford | F-350 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2025 | Ford | Mustang | — | 5.0L | V8 | N/A | OE Fine Wire Double Platinum |
| 2025 | Ford | Transit-150 | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2025 | Ford | Transit-250 | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2025 | Ford | Transit-350 | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2025 | Ford | Transit-350 HD | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2024 | Ford | E-350 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2024 | Ford | F-250 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2024 | Ford | F-350 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2024 | Ford | Mustang | — | 5.0L | V8 | N/A | OE Fine Wire Double Platinum |
| 2024 | Ford | Transit-150 | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2024 | Ford | Transit-250 | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2024 | Ford | Transit-350 | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2024 | Ford | Transit-350 HD | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2023 | Ford | E-350 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2023 | Ford | F-150 | — | 3.3L | V6 | N/A | OE Fine Wire Double Platinum |
| 2023 | Ford | F-250 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2023 | Ford | F-350 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2023 | Ford | Mustang | — | 5.0L | V8 | N/A | OE Fine Wire Double Platinum |
| 2023 | Ford | Transit-150 | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2023 | Ford | Transit-250 | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2023 | Ford | Transit-350 | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2023 | Ford | Transit-350 HD | — | 3.5L | V6 | N/A | OE Fine Wire Double Platinum |
| 2022 | Ford | E-350 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2022 | Ford | F-250 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2022 | Ford | F-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2022 | Ford | Mustang | — | 5.0L | V8 | N/A | OE Fine Wire Double Platinum |
| 2021 | Ford | E-350 Super Duty | — | 7.3L | V8 | N/A | OE Fine Wire Double Platinum |
| 2021 | Ford | F-250 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2021 | Ford | F-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2021 | Ford | Mustang | — | 5.0L | V8 | N/A | OE Fine Wire Double Platinum |
| 2020 | Ford | F-150 | — | 5.0L | V8 | N/A | OE Fine Wire Double Platinum |
| 2020 | Ford | F-250 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2020 | Ford | F-250 Super Duty | — | 7.3L | V8 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2020 | Ford | F-350 Super Duty | — | 7.3L | V8 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2020 | Ford | F-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2020 | Ford | Mustang | GT Premium | 5.0L | V8 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2019 | Ford | E-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2019 | Ford | F-150 | — | 5.0L | V8 | N/A | OE Fine Wire Double Platinum |
| 2019 | Ford | F-250 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2019 | Ford | F-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2019 | Ford | Mustang | — | 5.0L | V8 | N/A | Do Not Gap, Gap is Preset; Original Center Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2018 | Ford | E-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2018 | Ford | F-150 | — | 5.0L | V8 | N/A | OE Fine Wire Double Platinum |
| 2018 | Ford | F-250 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2018 | Ford | F-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2017 | Ford | E-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2017 | Ford | F-250 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2017 | Ford | F-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2016 | Ford | F-250 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2016 | Ford | F-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2015 | Ford | F-250 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2015 | Ford | F-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2014 | Ford | F-150 | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2014 | Ford | F-250 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2014 | Ford | F-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2013 | Ford | F-150 | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2013 | Ford | F-250 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2013 | Ford | F-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2012 | Ford | F-150 | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2012 | Ford | F-250 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2012 | Ford | F-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2011 | Ford | F-150 | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2011 | Ford | F-250 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2011 | Ford | F-350 Super Duty | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
| 2010 | Ford | F-150 | — | 6.2L | V8 | N/A | Do Not Gap, Gap is Preset; with Dual Spark Plugs; Original Center Electrode and Ground Electrode Material is Platinum; OE Fine Wire Double Platinum |
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