Bosch ZR6SII3320
Bosch ZR6SII3320 OE Fine Wire Double Iridium Spark Plug Instruction Manual
Model: ZR6SII3320
Product Overview
Product Description
Bosch Double Iridium Spark Plugs are engineered to deliver both high performance and long life, representing advanced original equipment (OE) spark plug technology. The ultra-fine wire design and laser welded tapered ground electrode deliver optimum performance, while the iridium center electrode and iridium ground electrode inlay help it to go the distance. OE-matched spark position ensures compatibility with Gasoline Direct Injection (GDI) technology used in modern gas engines. Bosch Double Iridium Spark Plugs are pre-gapped at the factory and feature nickel plated rolled threads that require no anti-seize, for simple, easy installation right out of the box. Unlock the performance in your engine with Bosch Double Iridium Spark Plugs.
Key Features
- Bosch Double Iridium Spark Plugs feature both an iridium firing pin and an iridium ground electrode inlay that offer higher performance and 4X longer life compared to standard copper spark plugs
- 360-degree laser welded ultra-fine wire iridium firing pin provides better ignitability - reducing voltage requirements up to 24% - and enhanced durability
- Nickel-plated rolled threads provide superior resistance to corrosion and do not require anti-seize - making installation quick and easy
- Bosch Double Iridium spark plugs are pre-gapped at the factory and ready to install right out of the box - gap adjustment prior to installation not required
- Meets or exceeds manufacturer design requirements for OE fit, form, and function for modern gasoline engines - including Gasoline Direct Injection (GDI) engines
- Compatible with select vehicles (Note: engine affects fitment - verify specific fitment details with amazon confirmed fit fit checker above): MERCEDES-BENZ: 2013-14 C300, 2012-15 C350, 2013 CL500, 2011-14 CL550, 2011-14 CL63 AMG, 2010-14 CLS350
- Compatible with (continued): MERCEDES-BENZ: 2012-17 CLS500, 2012-18 CLS550, 2012-14 CLS63 AMG, 2014-18 CLS63 AMG S, 2012-14 E300, 2012-16 E350, 2013-15 E400, 2012-17 E500, 2012-17 E550, 2012-15 E63 AMG, 2014-16 E63 AMG S, 2013-18 G63 AMG
- Compatible with (continued): MERCEDES-BENZ: 2013-16 GL450, 2013-14 GL500, 2013-16 GL550, 2013-16 GL63 AMG, 2016-18 GLE350, 2016,2018 GLE500, 2016-18 GLE550, 2016-20 GLE63 AMG, 2016-19 GLE63 AMG S, 2012-14 GLK300, 2013-15 GLK350, 2017 GLS500
- Compatible with (continued): MERCEDES-BENZ: 2017-19 GLS550, 2017-19 GLS63 AMG, 2017 Maybach S550, 2012-15 ML350, 2012-14 ML500, 2012-14 ML550, 2012-15 ML63 AMG, 2012-13 R350, 2011-13 S350, 2013-17 S500, 2015,2017 S500L, 2012-17 S550
- Compatible with (continued): MERCEDES-BENZ: 2011-17 S63 AMG, 2016-17 S63L AMG, 2013-19 SL500, 2013-19 SL550, 2013-19 SL63 AMG, 2012-16 SLK350, 2012-16 SLK55 AMG
What's in the Box
- spark plug
Image: The Bosch ZR6SII3320 OE Fine Wire Double Iridium Spark Plug shown alongside its product packaging.
Installation and Setup
Bosch Double Iridium spark plugs are designed for straightforward installation. They are pre-gapped at the factory, eliminating the need for manual gap adjustment prior to installation. The nickel-plated rolled threads provide superior resistance to corrosion and do not require anti-seize compound, further simplifying the process.
Pre-Installation Check
- Verify the spark plug model matches your vehicle's specifications.
- Ensure the spark plug is clean and free from any debris or damage.
- No gap adjustment is required as these plugs are factory pre-gapped.
Installation Steps
- Allow the engine to cool completely before beginning installation.
- Disconnect the battery's negative terminal.
- Carefully remove the ignition coil and old spark plug from each cylinder.
- Insert the new Bosch Double Iridium spark plug into the cylinder head by hand to avoid cross-threading.
- Tighten the spark plug to the manufacturer's specified torque using a torque wrench. Do not overtighten.
- Reinstall the ignition coil and reconnect the battery.
Image: A detailed close-up of the Bosch Double Iridium Spark Plug, highlighting its design.
Operation and Performance
The Bosch Double Iridium Spark Plug is a critical component in your engine's ignition system. It ignites the air-fuel mixture in the combustion chamber, creating the power stroke that drives the engine. Its advanced design ensures efficient combustion and optimal engine performance.
Performance Benefits
- Enhanced Ignitability: The ultra-fine wire design and laser-welded tapered ground electrode provide a strong, consistent spark.
- Longer Service Life: Double Iridium construction offers exceptional durability, lasting up to four times longer than standard copper spark plugs.
- Fuel Efficiency: Optimized combustion contributes to improved fuel economy.
- Smooth Engine Operation: Consistent spark delivery helps reduce misfires and ensures smoother engine running.
Image: An illustrative diagram depicting a spark plug igniting the air-fuel mixture within an engine cylinder.
Maintenance
While Bosch Double Iridium Spark Plugs are designed for extended life, regular inspection is recommended as part of your vehicle's routine maintenance schedule.
Recommended Maintenance
- Inspection: Periodically check the spark plugs for signs of wear, fouling, or damage. Consult your vehicle's service manual for recommended inspection intervals.
- Replacement: Replace spark plugs according to your vehicle manufacturer's recommendations or if signs of wear or performance degradation are observed.
Signs of Worn Spark Plugs
- Engine misfires or rough idling.
- Reduced fuel economy.
- Difficulty starting the engine.
- Sluggish acceleration.
Troubleshooting
Common Issues and Solutions
| Issue | Possible Cause | Solution |
|---|---|---|
| Engine Misfire | Worn or fouled spark plug, incorrect gap (unlikely with factory pre-gapped Bosch plugs), faulty ignition coil. | Inspect spark plugs for wear. If worn, replace. Check ignition coils. |
| Reduced Fuel Economy | Inefficient combustion due to worn spark plugs. | Replace spark plugs if they are past their service life or show signs of wear. |
| Hard Starting | Weak spark from worn spark plugs. | Replace spark plugs. |
Important Note
Always consult a qualified mechanic or your vehicle's service manual for complex issues.
Product Specifications
| Specification | Value |
|---|---|
| Brand | Bosch |
| Core Material | Iridium |
| Thread Size | 14mm x 1.25mm |
| Top Material Type | Nickel |
| Vehicle Service Type | GDI |
| Global Trade Identification Number | 04047024496736 |
| OEM Part Number | ZR 6 SII 3320, ZR6SII3320 |
| Manufacturer | Bosch Automotive |
| Model | Spark Plug |
| Item Weight | 1.41 ounces |
| Product Dimensions | 0.79 x 1.18 x 3.94 inches |
| Country of Origin | Germany |
| Item model number | ZR6SII3320_1 |
| Is Discontinued By Manufacturer | No |
| Exterior | Machined |
| Manufacturer Part Number | 789102362536 |
| ASIN | B0068M3I6C |
| Customer Reviews | 4.7 out of 5 stars (105 ratings) |
| Best Sellers Rank | #198,887 in Automotive #1,233 in Automotive Replacement Spark Plugs |
| Date First Available | April 5, 2013 |
Warranty and Support
Warranty Information
Bosch spark plugs are manufactured to high-quality standards. For specific warranty details, please refer to the official Bosch Automotive website or contact their customer support.
Additional Support
A user manual in PDF format is available for download: Download User Manual (PDF)
For further assistance, visit the Bosch Automotive Store on Amazon.