--- product_id: 24020782 title: "BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single" brand: "bosch" price: "€ 24.86" currency: EUR in_stock: true category: "Bosch" url: https://www.desertcart.be/products/24020782-bosch-9621-oe-fine-wire-double-iridium-spark-plug-single store_origin: BE region: Belgium --- # 24% less voltage needed 360° laser welded ultra-fine wire OE fit for modern GDI engines BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single **Brand:** bosch **Price:** € 24.86 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your drive with Bosch’s double iridium precision! ## Quick Answers - **What is this?** BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single by bosch - **How much does it cost?** € 24.86 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/24020782-bosch-9621-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 - • **Plug & Play Ready:** Factory pre-gapped for instant installation—no adjustments, no hassle. - • **Precision Laser Welding:** 360-degree laser welded electrodes ensure unmatched durability and consistent performance. - • **Effortless Ignition Power:** Ultra-fine iridium wire reduces voltage by 24%, sparking quicker starts and smoother rides. - • **Corrosion-Resistant Threads:** Nickel-plated rolled threads resist corrosion and galling, making removal a breeze. - • **Engineered for Modern Engines:** OE-matched design perfectly fits Gasoline Direct Injection (GDI) engines for peak efficiency. ## Overview Bosch 9621 OE Fine Wire Double Iridium Spark Plug delivers advanced ignition technology with a 360° laser welded ultra-fine iridium firing pin that reduces voltage requirements by up to 24%. Designed for modern gasoline engines including GDI, it features factory pre-gapped electrodes and corrosion-resistant nickel-plated threads for easy installation and long-lasting performance. ## Description Product Description Bosch OE Fine Wire 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 OE Fine Wire 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. The Nickel-plated rolled threads provide maximum resistance to corrosion - ensuring the spark plug removes easily from the cylinder head without galling - and do not require anti-seize during installation - saving time. Bosch Double Iridium Spark Plugs meet or exceed manufacturer design requirements for OE fit, form, and function for modern gasoline engines. Unlock the performance in your engine with Bosch Double Iridium Spark Plugs. brand_description Bosch Automotive ## Features - 360-degree laser welded ultra-fine wire iridium firing pin provides better ignitability - reducing voltage requirements up to 24% - and enhanced durability - Meets or exceeds manufacturer design requirements for OE fit, form, and function for modern gasoline engines - including Gasoline Direct Injection (GDI) engines ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B005GN1THO | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #543,226 in Automotive ( See Top 100 in Automotive ) #2,898 in Automotive Replacement Spark Plugs | | Brand Name | Bosch | | Compatible with Vehicle Type | Car, Truck | | Core Material | Iridium | | Customer Reviews | 4.6 4.6 out of 5 stars (169) | | Gap Size | 0.04 Inches | | Global Trade Identification Number | 00028851034258 | | Included Components | spark plug | | Item Type Name | Spark Plug | | Item Weight | 0.09 Pounds | | Manufacturer | Bosch Automotive | | Manufacturer Part Number | 9621 | | Manufacturer Warranty Description | Limited | | Model Number | 9621_1 | | OEM Equivalent Part Number | 9621 | | Thread Size | 12mm | | Top Material Type | Nickel | | UPC | 028851034258 | ## Product Details - **Brand:** Bosch - **Core Material:** Iridium - **Thread Size:** 12mm - **Top Material Type:** Nickel - **Vehicle Service Type:** Car, Truck ## Images ![BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single - Image 1](https://m.media-amazon.com/images/I/71FZXJroy2L.jpg) ![BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single - Image 2](https://m.media-amazon.com/images/I/7146NFBC01L.jpg) ## Frequently Bought Together - BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single - Mobil 1 Extended Performance Full Synthetic Motor Oil 0W-20, 5 Quart - K&N Select Oil Filter: Designed to Protect your Engine: Fits Select INFINITI/MAZDA/NISSAN/SUBARU Vehicle Models (See Product Description for Full List of Compatible Vehicles), SO-1008 --- ## 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.be/products/24020782-bosch-9621-oe-fine-wire-double-iridium-spark-plug-single](https://www.desertcart.be/products/24020782-bosch-9621-oe-fine-wire-double-iridium-spark-plug-single) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-07-19*