--- product_id: 24020782 title: "BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single" brand: "bosch" price: "€ 23.90" currency: EUR in_stock: true category: "Bosch" url: https://www.desertcart.at/products/24020782-bosch-9621-oe-fine-wire-double-iridium-spark-plug-single store_origin: AT region: Austria --- # 4X longer lifespan 24% less voltage needed Nickel-plated corrosion resistance BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single **Brand:** bosch **Price:** € 23.90 **Availability:** ✅ In Stock ## Summary > ⚡ Spark your drive with Bosch Double Iridium – where longevity meets lightning-fast performance! ## Quick Answers - **What is this?** BOSCH 9621 OE Fine Wire Double Iridium Spark Plug - Single by bosch - **How much does it cost?** € 23.90 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/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 perfect fit and instant installation—no adjustments, no hassle. - • **Ignite with Precision:** 360° laser-welded ultra-fine iridium wire ensures superior ignitability and peak engine performance. - • **OE-Grade Compatibility:** Meets or exceeds original equipment specs for modern GDI engines across top vehicle brands. - • **Built to Last 4X Longer:** Double iridium electrodes deliver unmatched durability, outlasting standard copper plugs by four times. - • **Corrosion-Proof Installation:** Nickel-plated rolled threads resist corrosion and eliminate the need for anti-seize, saving you time. ## Overview Bosch 9621 OE Fine Wire Double Iridium Spark Plug features dual iridium electrodes and a laser-welded ultra-fine wire design that reduces voltage requirements by 24% and lasts 4 times longer than standard plugs. With corrosion-resistant nickel-plated threads and factory pre-gapping, it ensures hassle-free installation and OE-level performance for modern gasoline engines, including Gasoline Direct Injection (GDI) models. ## 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 - Bosch OE Fine Wire 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 maximum resistance to corrosion - ensuring the spark plugs remove easily from the cylinder head without galling - and do not require anti-seize during installation - saving time - 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 - 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 including, but not limited to, the following (Note: engine affects fitment - verify specific fitment details with fit checker above): INFINITI: 2008-12 EX35, 2013 EX37, 2009-12 FX35, 2013 FX37, 2009-13 FX50, 2011-12 G25 - Compatible with (continued): INFINITI: 2007-08 G35, 2008-13 G37, 2013 JX35, 2009-10 M35, 2012-13 M35h, 2011-13 M37, 2011-13 M56, 2015 Q40, 2014-18 Q50, 2014-16 Q60, 2014-19 Q70, 2015-19 Q70L, 2014-17 QX50, 2011-13 QX56, 2014-24 QX60 - Compatible with (continued): INFINITI: 2014-20 QX70, 2014-24 QX80; MAZDA: 2015-16,2018-21 2, 2012-23 3, 2014-21 6, 2016-21 CX-3, 2020-23 CX-30, 2013-24 CX-5, 2023-24 CX-50, 2025 CX-70, 2024-25 CX-90, 2016-25 Miata; NISSAN: 2007-09 350Z - Compatible with (continued): NISSAN: 2009-20 370Z, 2007-22 Altima, 2017-24 Armada, 2006-08 Frontier, 2020-25 Frontier, 2009-23 Maxima, 2009-24 Murano, 2018-21 NV2500, 2018-21 NV3500, 2013-25 Pathfinder, 2011-17 Quest, 2021 Rogue - Compatible with (continued): NISSAN: 2020-22 Sentra, 2017-24 Titan, 2016-24 Titan XD; PONTIAC: 2009-10 Vibe; SCION: 2016 iA; TOYOTA: 2016-20 Yaris, 2017-18 Yaris iA, 2016-20 Yaris R ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B005GN1THO | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | #463,770 in Automotive ( See Top 100 in Automotive ) #2,563 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 (171) | | Gap Size | 0.04 inches | | Global Trade Identification Number | 00028851034258 | | Included Components | spark plug | | Item Highlight | Replaces 4912 52280 52289 900-1373 900-1663 924-1373 924-1663. OE-grade replacement. | | Item Type Name | Spark Plug | | Item Weight | 1.44 ounces | | Manufacturer | Bosch Automotive | | Manufacturer Part Number | 9621 | | Manufacturer Warranty Description | Limited | | Model Number | 9621_1 | | Number of Items | 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) ## Available Options This product comes in different **Size** options. ## 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.at/products/24020782-bosch-9621-oe-fine-wire-double-iridium-spark-plug-single](https://www.desertcart.at/products/24020782-bosch-9621-oe-fine-wire-double-iridium-spark-plug-single) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-09-24*