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Bosch
OE Fine Wire Double IridiumBosch 7434 Spark Plug
| Brand | Bosch 7434 |
|---|---|
| Resistance | 1000 |
| Ground Electrode Tip Design | Tapered |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Copper |
| Center Electrode Tip Material | Iridium |
| Pre-Gap Size | .7 |
| Ground Electrode Quantity | 1 |
| Hex Size | 14 |
| Manufacturer Heat Range | 6 |
| Seat Type | Flat |
| Reach | 26.5 |
| Thread Diameter | 12 |
| Additional Accessories Included | No |
| Center Electrode Core Material | Nickel-chromium-iron and copper |
| Ground Electrode Tip Material | Platinum and nickel-chromium-iron and copper |
| Insulator Material | Ceramic |
| Insulator Type | Projected |
| Outdoor Power Equipment Application | No |
| Package Contents | Spark plug |
| Package Quantity | 1 |
| Private Brand? | No |
| Product Length | 3.326772 in |
| Product Width | 0.669291 in |
| Resistor | Yes |
| Short Style | No |
| Spark Plug Type | 4-cycle |
| Product line | OE Fine Wire Double Iridium |
| Fits | Mercedes-Benz · 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 ground electrode. Adds durability with an iridium-alloy inlay.
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Bosch OE Fine Wire Double Iridium Spark Plug 7434
Bosch 7434 is an OE Fine Wire Double Iridium spark plug built for direct replacement performance in select Mercedes-Benz applications. It combines a fine-wire iridium center electrode with a laser-welded tapered ground electrode for strong ignitability, stable combustion, and long service life.
Compatible With Mercedes-Benz C300, C350, E350, E400, GLE400, GLE350, GLS450, SL450, and other listed applications, this plug is supplied with a preset gap and should not be regapped during installation.
OE Fine Wire Double Iridium Design
- Part number 7434 from Bosch OE Fine Wire Double Iridium
- Iridium center electrode firing pin for consistent spark delivery
- Laser-welded ground electrode with iridium alloy inlay
- Tapered ground electrode tip design for improved ignitability
- Resistor spark plug with 1000 ohm resistance
- Projected ceramic insulator and flat seat construction
- Preset .7 gap; do not gap before installation
Detailed Product Overview
Bosch OE Fine Wire Double Iridium plugs are engineered for drivers who want OE-style ignition performance with extended durability. The fine-wire center electrode and tapered ground electrode help promote efficient spark formation, while the double iridium construction supports long-term wear resistance under demanding engine conditions. Part number 7434 is a 4-cycle spark plug with a 12 mm thread diameter, 14 mm hex, 26.5 mm reach, and heat range 6.
This Bosch 7434 spark plug is listed for a wide range of Mercedes-Benz models, including 2012-2016 Mercedes-Benz E350, 2013-2014 Mercedes-Benz C300, 2012-2014 Mercedes-Benz C350, 2015-2018 Mercedes-Benz E400, 2016-2019 Mercedes-Benz GLE400, and 2017-2021 Mercedes-Benz C43 AMG. It also covers additional Mercedes-Benz applications such as GLE350, GLS450, SL450, SLC43 AMG, and E43 AMG.
This part cross-references no listed interchange part numbers in the provided data.
Common Issues This Spark Plug Addresses
- Rough idle caused by worn ignition electrodes
- Hard starting from weakened spark output
- Misfire conditions related to plug wear
- Reduced throttle response from inconsistent combustion
- Service intervals requiring OE-style spark plug replacement
Installation Notes and Tips
- Fits 2012-2016 Mercedes-Benz E350, N/A
- Fits 2013-2014 Mercedes-Benz C300, N/A
- Fits 2012-2014 Mercedes-Benz C350, N/A
- Fits 2015-2018 Mercedes-Benz E400, N/A
- Fits 2016-2019 Mercedes-Benz GLE400, N/A
- Fits 2017-2021 Mercedes-Benz C43 AMG, N/A
- Do not gap this spark plug; the gap is preset from the factory
- Verify engine application by year, make, and model before installation
- Use the correct torque procedure for the cylinder head and plug seat type
Quality Assurance
Bosch OE Fine Wire Double Iridium plugs are built to OE-level specifications with laser-welded electrode construction and iridium-alloy materials for durability and consistent ignition performance. Part number 7434 is packaged as one spark plug.
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 |
|---|---|---|---|---|---|---|---|---|
| 2021 | Mercedes-Benz | C43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2020 | Mercedes-Benz | C43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2020 | Mercedes-Benz | E450 | RWD | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2020 | Mercedes-Benz | S450 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2020 | Mercedes-Benz | SL450 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2020 | Mercedes-Benz | SL550 | — | 4.7L | V8 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2020 | Mercedes-Benz | SLC43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2019 | Mercedes-Benz | C43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2019 | Mercedes-Benz | E450 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2019 | Mercedes-Benz | GLE400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2019 | Mercedes-Benz | GLE43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2019 | Mercedes-Benz | GLS450 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2019 | Mercedes-Benz | S450 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2019 | Mercedes-Benz | SL450 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2019 | Mercedes-Benz | SLC43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2018 | Mercedes-Benz | C43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2018 | Mercedes-Benz | E400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2018 | Mercedes-Benz | E43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2018 | Mercedes-Benz | GLE350 | — | 3.5L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2018 | Mercedes-Benz | GLE400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2018 | Mercedes-Benz | GLE43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2018 | Mercedes-Benz | GLE550e | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2018 | Mercedes-Benz | GLS450 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2018 | Mercedes-Benz | S450 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2018 | Mercedes-Benz | SL450 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2018 | Mercedes-Benz | SLC43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2017 | Mercedes-Benz | C43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2017 | Mercedes-Benz | CLS400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2017 | Mercedes-Benz | E400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2017 | Mercedes-Benz | E43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2017 | Mercedes-Benz | GLC43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2017 | Mercedes-Benz | GLE350 | — | 3.5L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2017 | Mercedes-Benz | GLE400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2017 | Mercedes-Benz | GLE43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2017 | Mercedes-Benz | GLE550e | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2017 | Mercedes-Benz | GLS450 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2017 | Mercedes-Benz | S550e | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2017 | Mercedes-Benz | SL450 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2017 | Mercedes-Benz | SLC43 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2016 | Mercedes-Benz | C450 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2016 | Mercedes-Benz | CLS400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2016 | Mercedes-Benz | E350 | — | 3.5L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2016 | Mercedes-Benz | E400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2016 | Mercedes-Benz | GLE350 | — | 3.5L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2016 | Mercedes-Benz | GLE400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2016 | Mercedes-Benz | GLE450 AMG | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2016 | Mercedes-Benz | GLE550e | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2016 | Mercedes-Benz | S550e | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2016 | Mercedes-Benz | SL400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2015 | Mercedes-Benz | CLS400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2015 | Mercedes-Benz | E350 | — | 3.5L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2015 | Mercedes-Benz | E400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2015 | Mercedes-Benz | ML400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2015 | Mercedes-Benz | S550e | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2015 | Mercedes-Benz | SL400 | — | 3.0L | V6 | — | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2014 | Mercedes-Benz | C300 | — | 3.5L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2014 | Mercedes-Benz | C350 | — | 3.5L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2014 | Mercedes-Benz | E350 | — | 3.5L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2013 | Mercedes-Benz | C300 | — | 3.5L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2013 | Mercedes-Benz | C350 | — | 3.5L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2013 | Mercedes-Benz | E350 | — | 3.5L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2012 | Mercedes-Benz | C350 | — | 3.5L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
| 2012 | Mercedes-Benz | E350 | — | 3.5L | V6 | FLEX | N/A | Do Not Gap, Gap is Preset; Available Until Inventory Is Depleted; Original Center Electrode Material is Iridium; OE Fine Wire Double Iridium |
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