--- product_id: 86992814 title: "BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Advanced Original Equipment Technology with 4X Life - Pack of 4" brand: "bosch" price: "C$3930" currency: NIO in_stock: true reviews_count: 13 category: "Bosch" url: https://www.desertcart.ni/products/86992814-bosch-9621-oe-fine-wire-double-iridium-spark-plug-advanced store_origin: NI region: Nicaragua --- # 4X longer lifespan 24% less voltage needed 12mm corrosion-resistant threads BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Advanced Original Equipment Technology with 4X Life - Pack of 4 **Brand:** bosch **Price:** C$3930 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite Performance, Drive with Confidence! ## Quick Answers - **What is this?** BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Advanced Original Equipment Technology with 4X Life - Pack of 4 by bosch - **How much does it cost?** C$3930 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/86992814-bosch-9621-oe-fine-wire-double-iridium-spark-plug-advanced) ## 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 - • **Ready Out of the Box:** Factory pre-gapped for hassle-free installation—no adjustments needed, saving you time and effort. - • **Built to Last 4X Longer:** Double iridium electrodes deliver unmatched durability, keeping your ride smooth mile after mile. - • **Precision Ignition Power:** 360° laser-welded ultra-fine iridium wire reduces voltage by 24%, igniting your engine faster and cleaner. - • **OE-Perfect Fit & Function:** Engineered to meet or exceed manufacturer specs, ensuring seamless compatibility with modern GDI engines. - • **Corrosion-Resistant Threads:** Nickel-plated rolled threads prevent galling and eliminate the need for anti-seize, making maintenance a breeze. ## Overview Bosch 9621 OE Fine Wire Double Iridium Spark Plugs combine cutting-edge 360° laser welding and ultra-fine iridium electrodes to reduce voltage requirements by 24% and extend spark plug life by 4X. Designed for modern gasoline engines including GDI, these plugs come pre-gapped and feature corrosion-resistant nickel-plated threads for easy installation and long-lasting performance. ## 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. Review: Very Expensive - Had one cylinder misfiring so replaced coil and spark plug. Runs fine now, but old plug looked shot after only 5 months so I think the coil was the problem. Really good plug so far but very expensive. Review: Excelente producto y calidad - Excelente producto, llego a tiempo ## 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 | B0762GB2TM | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #24,017 in Automotive ( See Top 100 in Automotive ) #152 in Automotive Replacement Spark Plugs | | Brand | Bosch | | Brand Name | Bosch | | Compatible with Vehicle Type | Car, SUV, Truck | | Core Material | Iridium | | Customer Reviews | 4.6 out of 5 stars 622 Reviews | | Gap Size | 0.04 inches | | Global Trade Identification Number | 00028851034265 | | Included Components | Spark Plugs | | Item Type Name | Spark Plugs | | Manufacturer | Bosch Automotive | | Manufacturer Part Number | 9621 | | Manufacturer Warranty Description | Limited | | Model Number | 9621 | | Thread Size | 12mm | | Top Material Type | Iridium | | UPC | 028851034265 | | Unit Count | 4 Count | | Vehicle Service Type | Car, SUV, Truck | ## Product Details - **Brand:** Bosch - **Core Material:** Iridium - **Thread Size:** 12mm - **Top Material Type:** Iridium - **Vehicle Service Type:** Car, SUV, Truck ## Images ![BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Advanced Original Equipment Technology with 4X Life - Pack of 4 - Image 1](https://m.media-amazon.com/images/I/71FZXJroy2L.jpg) ![BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Advanced Original Equipment Technology with 4X Life - Pack of 4 - Image 2](https://m.media-amazon.com/images/I/61GmL0w8STL.jpg) ![BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Advanced Original Equipment Technology with 4X Life - Pack of 4 - Image 3](https://m.media-amazon.com/images/I/61SR5jxEiPL.jpg) ![BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Advanced Original Equipment Technology with 4X Life - Pack of 4 - Image 4](https://m.media-amazon.com/images/I/51Q9udIwTTL.jpg) ![BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Advanced Original Equipment Technology with 4X Life - Pack of 4 - Image 5](https://m.media-amazon.com/images/I/61xQszqJFIL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very Expensive *by J***. on February 12, 2026* Had one cylinder misfiring so replaced coil and spark plug. Runs fine now, but old plug looked shot after only 5 months so I think the coil was the problem. Really good plug so far but very expensive. ### ⭐⭐⭐⭐⭐ Excelente producto y calidad *by D***S on July 8, 2026* Excelente producto, llego a tiempo ### ⭐⭐⭐⭐⭐ Buy them. *by L***O on July 12, 2026* Easy to install, run good. --- ## 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.ni/products/86992814-bosch-9621-oe-fine-wire-double-iridium-spark-plug-advanced](https://www.desertcart.ni/products/86992814-bosch-9621-oe-fine-wire-double-iridium-spark-plug-advanced) --- *Product available on Desertcart Nicaragua* *Store origin: NI* *Last updated: 2026-07-25*