--- product_id: 62912641 title: "Bosch Iridium Spark Plug ZQR8SI302, 1 Spark Plug | For a Reliable Gasoline Engine Start and Long Service Life - with Robust Design" brand: "bosch" price: "¥3983" currency: JPY in_stock: true reviews_count: 13 category: "Bosch" url: https://www.desertcart.jp/products/62912641-bosch-iridium-spark-plug-zqr8si302-1-spark-plug-for-reliable store_origin: JP region: Japan --- # Iridium Core for Superior Ignition M14x1.25 Thread Size Reliable Cold-Start Performance Bosch Iridium Spark Plug ZQR8SI302, 1 Spark Plug | For a Reliable Gasoline Engine Start and Long Service Life - with Robust Design **Brand:** bosch **Price:** ¥3983 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your drive with Bosch precision and power! ## Quick Answers - **What is this?** Bosch Iridium Spark Plug ZQR8SI302, 1 Spark Plug | For a Reliable Gasoline Engine Start and Long Service Life - with Robust Design by bosch - **How much does it cost?** ¥3983 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/62912641-bosch-iridium-spark-plug-zqr8si302-1-spark-plug-for-reliable) ## Best For - bosch enthusiasts ## Why This Product - Trusted bosch brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Maintenance:** QR code on packaging links to detailed installation guides—DIY made easy. - • **Optimize Your Ride:** Replace spark plugs as a set to prevent misfires and maintain peak engine performance. - • **Engineered for Endurance:** Iridium core delivers exceptional wear resistance and long service life. - • **Cold Mornings? No Problem:** Bosch tech ensures smooth ignition even in freezing temperatures. - • **Precision Fit, Zero Hassle:** Pre-set electrode gap (0.95mm) means no adjustments needed—just plug and play. ## Overview The Bosch Iridium Spark Plug ZQR8SI302 features a robust M14x1.25 thread and a durable iridium core for superior ignition and long-lasting performance. Designed with a pre-set 0.95mm electrode gap, it guarantees hassle-free installation and reliable cold-start capability. Ideal for professional-grade engine maintenance, this spark plug enhances combustion efficiency and engine reliability, backed by Bosch’s century-long ignition expertise. ## Description From the manufacturer Fire-up your journey with Bosch spark plugs Bosch technology made history in 1902 by patenting the first spark plug. Since then, Bosch's ignition expertise has expanded, offering you reliable cold-starting performance even on the coldest days. Designed to enhance combustion, Bosch spark plugs ensure that your vehicle starts smoothly and efficiently, offering excellent wear resistance at the same time. Known as the unsung heroes under our hoods, the plugs are also easy to replace. Designed to fit your engine, the pre-set electrode gap means no further adjustments are needed. Bosch offers a tailored ignition experience with a range of spark plugs, featuring diverse electrode alloys that are made to meet the unique requirements of each engine. To find the right plug for your vehicle, make sure to use the parts' search function at the top of this page, using your vehicle identification number as a reference. Improved combustion The spark plugs ensure that your vehicle starts smoothly and maintains steady acceleration. Excellent in cold weather Thanks to Bosch ignition technology, experience a consistent cold-start performance. Long-lasting Made with robust materials, Bosch spark plugs offer excellent wear resistance and corrosion protection. Hassle-free maintenance Each spark plug package features a customized QR-code that leads to detailed mounting instructions. Workshop tips Tighten using a torque wrench Mount the spark plug by hand as far as it will go, then precisely tighten using the correct tightening torque as indicated on the package. Replace the whole set at once Replacing spark plugs as a set simplifies maintenance, prevents misfires and ensures engine reliability. It is also a time-saver. Do not lubricate the thread Applying lubricant to the threads can lead to over-tightening. Over-tightening spark plugs can lead to engine damage. Review: Great plugs - These Bosch plugs are up to the usual Bosch standard - that is that they are top notch replacements for your motor. These went in easily and have performed flawlessly sinc ebeing fitted. Trouble free motoring. Review: Top quality - Top quality, perfect fit ## Features - Spanner Size: 14 - Item Package Length: 2.2 cm - Item Package Width: 2.6 cm - Item Package Height: 9.8 cm ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0068M354C | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | 82,915 in Automotive ( See Top 100 in Automotive ) 439 in Car Spark Plugs | | Brand | Bosch | | Brand Name | Bosch | | Compatible with Vehicle Type | Car | | Core Material | Iridium | | Core material | Iridium | | Customer Reviews | 4.6 out of 5 stars 641 Reviews | | Gap Size | 0.95 Millimeters | | Global Trade Identification Number | 04047024496712 | | Included Components | spark plug | | Item Type Name | Bosch 0242129512 Spark Plug | | Item Weight | 40 Grams | | Manufacturer | Bosch | | Manufacturer Part Number | 0242129512 | | Manufacturer Warranty Description | Limited | | Model Number | ZQR8SI302_1 | | OEM Equivalent Part Number | 12 12 0 034 677 | | Thread Size | M14x1.25 | | Thread size | M14x1.25 | | Top Material Type | Nickel | | Top material type | Nickel | | Unit Count | 1.0 count | | Vehicle service type | Car | ## Product Details - **Brand:** Bosch - **Core material:** Iridium - **Thread size:** M14x1.25 - **Top material type:** Nickel - **Vehicle service type:** Car ## Images ![Bosch Iridium Spark Plug ZQR8SI302, 1 Spark Plug | For a Reliable Gasoline Engine Start and Long Service Life - with Robust Design - Image 1](https://m.media-amazon.com/images/I/711j7uQXyOL.jpg) ![Bosch Iridium Spark Plug ZQR8SI302, 1 Spark Plug | For a Reliable Gasoline Engine Start and Long Service Life - with Robust Design - Image 2](https://m.media-amazon.com/images/I/515DfZ4FLML.jpg) ![Bosch Iridium Spark Plug ZQR8SI302, 1 Spark Plug | For a Reliable Gasoline Engine Start and Long Service Life - with Robust Design - Image 3](https://m.media-amazon.com/images/I/61SkARqksAL.jpg) ![Bosch Iridium Spark Plug ZQR8SI302, 1 Spark Plug | For a Reliable Gasoline Engine Start and Long Service Life - with Robust Design - Image 4](https://m.media-amazon.com/images/I/41MAlJ+Wc+L.jpg) ![Bosch Iridium Spark Plug ZQR8SI302, 1 Spark Plug | For a Reliable Gasoline Engine Start and Long Service Life - with Robust Design - Image 5](https://m.media-amazon.com/images/I/615svUJJi1L.jpg) ## Available Options This product comes in different **Pattern, Style** options. ## Questions & Answers **Q: What size socket is needed?** A: Hi, it's 14mm. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great plugs *by R***. on 1 June 2025* These Bosch plugs are up to the usual Bosch standard - that is that they are top notch replacements for your motor. These went in easily and have performed flawlessly sinc ebeing fitted. Trouble free motoring. ### ⭐⭐⭐⭐⭐ Top quality *by T***T on 17 March 2026* Top quality, perfect fit ### ⭐⭐⭐⭐⭐ Worked perfectly *by D***W on 3 June 2025* Worked perfectly ## Frequently Bought Together - BOSCH ZQR8SI302 OE Fine Wire Iridium Spark Plug - Single - ATLIN 14mm Spark Plug Socket - Thin Wall Spark Plug Socket - Compatible with BMW, MINI, Nissan --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/62912641-bosch-iridium-spark-plug-zqr8si302-1-spark-plug-for-reliable](https://www.desertcart.jp/products/62912641-bosch-iridium-spark-plug-zqr8si302-1-spark-plug-for-reliable) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-01*