--- product_id: 100341960 title: "BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single" brand: "bosch" price: "£19.83" currency: GBP in_stock: true reviews_count: 5 category: "Bosch" url: https://www.desertcart.co.uk/products/100341960-bosch-9603-oe-fine-wire-double-iridium-spark-plug-single store_origin: GB region: United Kingdom --- # 4X longer service life vs copper plugs 0.6mm ultra-fine wire for superior ignitability 360° laser weld for unmatched durability BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single **Brand:** bosch **Price:** £19.83 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your drive with Bosch’s double iridium spark—where precision meets endurance! ## Quick Answers - **What is this?** BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single by bosch - **How much does it cost?** £19.83 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/100341960-bosch-9603-oe-fine-wire-double-iridium-spark-plug-single) ## 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 - • **Built to Withstand:** 360° continuous laser weld fuses corrosion-resistant iridium for rock-solid durability under pressure. - • **Plug & Play Simplicity:** Factory pre-gapped and nickel-plated threads mean effortless installation—no anti-seize needed. - • **Endurance That Outlasts:** Double iridium electrodes deliver 4X longer lifespan, keeping your ride smooth mile after mile. - • **Precision Ignition Power:** Ultra-fine 0.6mm iridium wire ensures lightning-fast spark and peak engine performance. - • **GDI-Optimized Compatibility:** OE-matched spark position designed for modern Gasoline Direct Injection engines, maximizing efficiency. ## Overview The Bosch 9603 OE Fine Wire Double Iridium Spark Plug features a 0.6mm ultra-fine iridium firing pin and ground electrode inlay, delivering 4X longer service life than standard copper plugs. Its 360° continuous laser weld ensures exceptional durability and corrosion resistance. Factory pre-gapped with nickel-plated threads, it offers easy installation and is optimized for Gasoline Direct Injection engines, making it a premium choice for enhanced engine performance and longevity. ## 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. Review: Toyota Sienna 2006 Review: Nice product ## Features - Double Iridium firing pin and ground electrode inlay provide 4X longer service life compared to standard copper plugs - 0.6mm fine wire firing pin provides superior ignitability and performance - 360° continuous laser weld fuses corrosion resistant iridium firing pin to base for increased durability - International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00515NH4K | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | 731,589 in Automotive ( See Top 100 in Automotive ) 2,679 in Car Spark Plugs | | Brand Name | Bosch | | Compatible with Vehicle Type | Car | | Core Material | Iridium | | Customer Reviews | 4.6 4.6 out of 5 stars (830) | | Global Trade Identification Number | 00028851010375 | | Item Weight | 23 g | | Manufacturer | Bosch | | Manufacturer Part Number | 9603 | | Model Number | 9603_1 | | OEM Equivalent Part Number | 9603 | | Thread Size | 1.25mm | | Top Material Type | Nickel | | UPC | 028851010375 | | Unit Count | 1.0 count | ## Product Details - **Brand:** Bosch - **Core material:** Iridium - **Thread size:** 1.25mm - **Top material type:** Nickel - **Vehicle service type:** Car ## Images ![BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single - Image 1](https://m.media-amazon.com/images/I/71tqIg+ETUL.jpg) ![BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single - Image 2](https://m.media-amazon.com/images/I/7146NFBC01L.jpg) ![BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single - Image 3](https://m.media-amazon.com/images/I/610qEbONlPL.jpg) ## Available Options This product comes in different **Number Of Items** options. ## Questions & Answers **Q: what is the gap preset on these spark plugs in inches?** A: Most Bosch Spark Plugs are factory pre-gapped for popular vehicle applications. The gap measurements are indicated either on the box, or by the part number located on the spark plug shell. X suffix = .044" Y suffix = .060" Z suffix = .080". However, it must be noted that wire-tip or needle-tip plugs can afford to have larger gaps as the spark occurs at a lower voltage if one end is pointed, leading to a wider spark and better combustion of the fuel-air mixture. Gaps should never be adjusted on the OE-Fine Wire-tipped plugs - should never be gapped by the installer. Attempts to do so might damage the plug/the delicate tip. What is more important is all the plugs should have equal gaps, or there might be engine knocking and vibrations. **Q: Will this work for Lawnmower ?** A: Only if your lawn mower has a 2.2L 4 cylinder engine. **Q: uses 14MM socket?** A: 14mm socket is standard - 10mm and 12mm are less common, found in only some motorcycles. What is more important is the thread reach - too little or too much are both bad. Amazon has a nice system of selecting the vehicle and showing which plugs fit that vehicle. Bosch has a similar system at BoschAutoParts.com. Remember to NEVER gap-adjust iridium plugs. **Q: Will this work for honda crv 2016?** A: Bosch 9603 does not fit the 2016 Honda CR-V. The correct Bosch spark plug for this application is 96310. Thank you for your question. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by A***R on 24 September 2018* Toyota Sienna 2006 ### ⭐⭐⭐⭐⭐ Review *by B***D on 26 June 2022* Nice product ### ⭐⭐⭐⭐⭐ Review *by C***A on 12 February 2026* High-quality spark plugs that fit perfectly and work as expected. Engine runs smoother and starts easily. Durable and dependable — Bosch never disappoints. Great value for maintenance or replacement! ## Frequently Bought Together - BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single - BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Pack of 4 - FEL-PRO VS 50530 R Engine Valve Cover Gasket Set for Toyota Camry --- ## 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.co.uk/products/100341960-bosch-9603-oe-fine-wire-double-iridium-spark-plug-single](https://www.desertcart.co.uk/products/100341960-bosch-9603-oe-fine-wire-double-iridium-spark-plug-single) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-14*