--- product_id: 73330010 title: "9603 OE Fine Wire Double Iridium Spark Plug - Pack of 4" brand: "bosch" price: "€ 51.87" currency: EUR in_stock: true reviews_count: 13 category: "Bosch" url: https://www.desertcart.hr/products/73330010-9603-oe-fine-wire-double-iridium-spark-plug-pack-4 store_origin: HR region: Croatia --- # 4X longer lifespan 24% less voltage needed No anti-seize needed 9603 OE Fine Wire Double Iridium Spark Plug - Pack of 4 **Brand:** bosch **Price:** € 51.87 **Availability:** ✅ In Stock ## Summary > ⚡ Ignite your drive with Bosch’s double iridium spark—where precision meets endurance! ## Quick Answers - **What is this?** 9603 OE Fine Wire Double Iridium Spark Plug - Pack of 4 by bosch - **How much does it cost?** € 51.87 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/73330010-9603-oe-fine-wire-double-iridium-spark-plug-pack-4) ## 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 - • **Effortless Installation:** Nickel-plated rolled threads resist corrosion and eliminate anti-seize—ready to install straight from the box. - • **Endurance That Outlasts:** Iridium double electrodes deliver 4X the lifespan of standard plugs—drive longer, worry less. - • **Precision Ignition Power:** 360° laser-welded ultra-fine iridium wire slashes voltage needs by 24%, igniting your engine with unmatched efficiency. - • **OE-Perfect Fit & Function:** Factory pre-gapped and engineered to meet or exceed OEM specs, ensuring seamless compatibility with modern GDI engines. - • **Trusted by Performance Enthusiasts:** Top-rated by 659+ users for smooth idling, improved MPG, and reliable power across a wide range of premium vehicles. ## Overview Bosch 9603 OE Fine Wire Double Iridium Spark Plugs combine advanced iridium technology and precision engineering to deliver superior ignitability, 4X longer life, and hassle-free installation. Pre-gapped and corrosion-resistant, these plugs are designed for modern gasoline engines including GDI, ensuring optimal performance and fuel efficiency across a broad spectrum of popular car, SUV, and truck models. ## 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: Didn’t think I needed them - 2012 2.5 Toyota engine running smooth, exceeding freeway mileage rating in mixed driving, 80000 miles with Carfax reported plug change at 50000 - what difference will replacement spark plugs make? Give it try. $30 and a half hour of work. Old ones were factory spec and visibly but not terribly crusty/worn, so maybe Carfax was wrong about the early replacement by the former owner; still, oem are rated for 100k-120k. Result? Perceptibly smoother engine; 100 lower idle RPM; 1.5 mpg improvement. So yeah, significant improvement. Moral: a good DIY project but if I had been faced with a $300 shop estimate…. Observation: those casual mechanics hanging looking to install basic parts around car parts shops probably do more to keep 7-year + vehicles on the road than dealerships who think in terms of $300-$500-$700 price points. Review: This product has been verified. - This product stands out in its category due to its superior quality and exceptional performance. I highly recommend it based on its technical merits and overall reliability. ## 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 exceptional resistance to corrosion and do not require anti-seize - making installation quick and easy - 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): ACURA: 92-01 Integra, 91-95 Legend, 91-05 NSX; HONDA: 11-16 CR-Z; JAGUAR: 01 XJ8 - Compatible with (cont): JAGUAR: 98-01 XJR, 00-02 XKR; LEXUS: 94-06 ES300/330, 98-00 GS400, 01-07 GS430, 03-09 GX470, 10-12 HS250h, 90-94,97-00 LS400, 01-06 LS430, 98-07 LX470, 99-06 RX300/330, 06-08 RX400h, 92-94 SC300, 92-00 SC400, 02-10 SC430 - Compatible with (cont): LINCOLN: 00-06 LS; MERCEDES-BENZ: 02-04 C32, 05-07 C55, 03-06 CLK55, 00-04 SLK230, 02-04 SLK32, 06-11 SLK55; MITSUBISHI: 11-17 Lancer, 11-20 Outlander Sport; NISSAN: 99-01 Altima, 99-00 Frontier, 98-00 Pathfinder - Compatible with (cont): PONTIAC: 03-06,09-10 Vibe; SCION: 05-10 tC, 08-12 xB; SUBARU: 10-13 Legacy, 10-15 Outback; SUZUKI: 06-08 Grand Vitara, 04-11 Swift/Swift+, 04-06 Verona, 05-06 XL-7; TOYOTA: 03-09 4Runner, 95-04 Avalon, 92-11 Camry - Compatible with (cont): TOYOTA: 92-05 Celica, 05-06,09-10,12-13 Corolla, 01-10 Highlander, 98-07 Land Cruiser, 03-06,09-12 Matrix, 92-95 MR2, 96-08 RAV4, 05-12 Sequoia, 98-06 Sienna, 99-08 Solara, 93-98 Supra, 05-10 Tundra; VOLVO: 07-10 S80, 05-11 XC90 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0792LVCZW | | Automotive Fit Type | Universal Fit | | Best Sellers Rank | #8,688 in Automotive ( See Top 100 in Automotive ) #44 in Automotive Replacement Spark Plugs | | Brand Name | Bosch | | Compatible with Vehicle Type | Car, SUV, Truck | | Core Material | Iridium | | Customer Reviews | 4.7 4.7 out of 5 stars (662) | | Global Trade Identification Number | 00028851010382 | | Included Components | Spark Plugs | | Item Type Name | Spark Plugs | | Item Weight | 0.43 Pounds | | Manufacturer | Bosch Automotive | | Manufacturer Part Number | 9603 | | Manufacturer Warranty Description | Limited | | Model Number | 9603 | | Thread Size | M30 | | Top Material Type | Iridium | | UPC | 028851010382 | | Unit Count | 4.0 Count | ## Product Details - **Brand:** Bosch - **Core Material:** Iridium - **Thread Size:** M30 - **Top Material Type:** Iridium - **Vehicle Service Type:** Car, SUV, Truck ## Images ![9603 OE Fine Wire Double Iridium Spark Plug - Pack of 4 - Image 1](https://m.media-amazon.com/images/I/71FZXJroy2L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Didn’t think I needed them *by M***K on February 1, 2026* 2012 2.5 Toyota engine running smooth, exceeding freeway mileage rating in mixed driving, 80000 miles with Carfax reported plug change at 50000 - what difference will replacement spark plugs make? Give it try. $30 and a half hour of work. Old ones were factory spec and visibly but not terribly crusty/worn, so maybe Carfax was wrong about the early replacement by the former owner; still, oem are rated for 100k-120k. Result? Perceptibly smoother engine; 100 lower idle RPM; 1.5 mpg improvement. So yeah, significant improvement. Moral: a good DIY project but if I had been faced with a $300 shop estimate…. Observation: those casual mechanics hanging looking to install basic parts around car parts shops probably do more to keep 7-year + vehicles on the road than dealerships who think in terms of $300-$500-$700 price points. ### ⭐⭐⭐⭐⭐ This product has been verified. *by W***D on November 23, 2025* This product stands out in its category due to its superior quality and exceptional performance. I highly recommend it based on its technical merits and overall reliability. ### ⭐⭐⭐⭐⭐ Fast shipping!!! Great Deal!! *by R***S on February 22, 2026* Fast shipping!!! Great Deal!! ## Frequently Bought Together - 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.hr/products/73330010-9603-oe-fine-wire-double-iridium-spark-plug-pack-4](https://www.desertcart.hr/products/73330010-9603-oe-fine-wire-double-iridium-spark-plug-pack-4) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-04-23*