--- product_id: 53780006 title: "OSRAM XENARC ULTRA LIFE D4S HID Xenon discharge bulb, discharge lamp, 66440ULT, folding carton box (1 unit)" brand: "osram" price: "$165.18" currency: USD in_stock: true reviews_count: 8 url: https://www.desertcart.us/products/53780006-osram-xenarc-ultra-life-d4s-hid-xenon-discharge-bulb-discharge store_origin: US region: United States of America --- # 4x longer lifespan 6000K crisp white light Vehicle-specific fit OSRAM XENARC ULTRA LIFE D4S HID Xenon discharge bulb, discharge lamp, 66440ULT, folding carton box (1 unit) **Brand:** osram **Price:** $165.18 **Availability:** ✅ In Stock ## Summary > 🚗 Light up your journey with OSRAM’s ultra-durable brilliance! ## Quick Answers - **What is this?** OSRAM XENARC ULTRA LIFE D4S HID Xenon discharge bulb, discharge lamp, 66440ULT, folding carton box (1 unit) by osram - **How much does it cost?** $165.18 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/53780006-osram-xenarc-ultra-life-d4s-hid-xenon-discharge-bulb-discharge) ## Best For - osram enthusiasts ## Why This Product - Trusted osram brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Brilliant Clarity:** Experience sharp, cool 6000K white light for enhanced road visibility. - • **Tailored Precision:** Perfect vehicle-specific fit ensures hassle-free installation every time. - • **Trusted Durability:** Backed by a 10-year OSRAM warranty for ultimate peace of mind. - • **Sleek Modern Design:** Upgrade your ride’s look with a stylish, contemporary lighting solution. - • **Unmatched Longevity:** Drive worry-free with 4x the lifespan of standard Xenon bulbs. ## Overview The OSRAM XENARC ULTRA LIFE D4S HID Xenon bulb delivers 4 times the lifespan of standard Xenon lamps, emitting a crisp 6000K white light tailored for vehicle-specific fit. Designed for drivers who demand longevity and style, it comes with a 10-year warranty, ensuring reliable performance and a modern aesthetic upgrade for your vehicle’s front lighting. ## Description Buy OSRAM XENARC ULTRA LIFE D4S HID Xenon discharge bulb, discharge lamp, 66440ULT, folding carton box (1 unit) at desertcart UK. Free delivery on eligible orders. Review: Was easy to replace, nice & bright, no colour difference. - Had a light fail on an Audi Q5, replaced it easily with one of these. It was easy to fit, light failure message on the dash cleared, nice bright white light, can’t notice any difference between this and the light on the other side. Very happy, especially not having to pay garage prices to get it replaced! The bulb came in a small box protected by a strong cardboard sleeve over the bulb inside. Review: Mercedes Benz E350 Coupe A207/ W212 ILS Replace Original D1S Headlight lamps - Noticed that one of headlights had recently turned pink when I looked back in a multi storey car park. It then failed completely only a few days later. Wanted to replace with a trusted brand and retain the original colour temperature of the headlights which is around 4300 - 4500 Kelvin for best overall night visibility as higher colour temps look whiter but are not necessarily as good for actual night vision. Ordered these Osram Original Xenarc D1S 66140 with the hope that they would be the same as the Mercedes Benz dealer bulbs and low and behold when I removed the cover to replace the original lamp I was greeted with exactly the same Osram 66140 lamp already in place! Now credit must go to Osram as these are the ORIGINAL lamps fitted to the car so that's a very good lifespan.. After looking online I was a bit worried that the replacement process might be a bit torturous but in the end it was very straightforward as I am fortunate to have the access panels with a small thumb turn release, built into the wheel arch liners so really all you need to do is raise the car on the jack to improve the clearance and access the lamps. (It's probably possible to do this without raising the car but it's a bit tight) A quarter turn of the round cover inside reveals the back of the lamp which is easily removed with another quarter turn and the cable disconnects by pressing the small metal clip. Be careful not to touch the new lamp with your fingers as it will shorten the lifespan. There is a plastic ring that unclips from around the buib that you reuse on the new one. Just make sure the small lugs engage in the same place as the original and you're ready to refit the lamp with the same quarter turn. Refit the round cover to seal the headlight against any dirt from the wheel arch . All in all quite easy to do at a massive saving over main dealer cost and the initial impression is better light output than the old lamps. (Follow up: after a three hour night drive and the new lamps are clearly better than the old, main beam in particular, so I should have changed them sooner just as a matter of course) ## Features - Ultra life is the Right choice for all Drivers who value LONG life Lamps, use Day time running light and driva a lot - Increased Lifetime: 4x more Lifetime (compared to standard Xenon Lamps) - Modern design and cool Look - 10 years OSRAM warranty ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01L8MOL0I | | Auto Part Position | Front | | Automotive Fit Type | Vehicle Specific Fit | | Best Sellers Rank | 1,477 in Automotive ( See Top 100 in Automotive ) 241 in Car Universal Bulb Kits | | Brand | OSRAM | | Brand Name | OSRAM | | Color Temperature | 6000 Kelvin | | Colour | White | | Colour temperature | 6000 Kelvin | | Customer Reviews | 4.6 out of 5 stars 14,494 Reviews | | Fit Type | Vehicle Specific Fit | | Global Trade Identification Number | 04052899425637 | | Item Type Name | Xenon headlight lamp | | Item Weight | 0.03 Kilograms | | Item package quantity | 1 | | Light Source Type | Xenon | | Light source type | Xenon | | Manufacturer | OSRAM | | Manufacturer Part Number | 66440ULT | | Manufacturer Warranty Description | 10 years warranty | | Model Number | 66440ULT | | OEM Equivalent Part Number | 66440 | | Package Quantity | 1 | | Specific Uses For Product | Head Light | | Specific uses for product | Head Light | | Unit Count | 1.0 count | | Voltage | 42 Volts | | Wattage | 35 watts | ## Product Details - **Brand:** OSRAM - **Colour temperature:** 6000 Kelvin - **Light source type:** Xenon - **Specific uses for product:** Head Light - **Wattage:** 35 watts ## Images ![OSRAM XENARC ULTRA LIFE D4S HID Xenon discharge bulb, discharge lamp, 66440ULT, folding carton box (1 unit) - Image 1](https://m.media-amazon.com/images/I/61ReV-r8FaL.jpg) ![OSRAM XENARC ULTRA LIFE D4S HID Xenon discharge bulb, discharge lamp, 66440ULT, folding carton box (1 unit) - Image 2](https://m.media-amazon.com/images/I/51NTaNdb0OL.jpg) ![OSRAM XENARC ULTRA LIFE D4S HID Xenon discharge bulb, discharge lamp, 66440ULT, folding carton box (1 unit) - Image 3](https://m.media-amazon.com/images/I/51EXBCKmjRL.jpg) ![OSRAM XENARC ULTRA LIFE D4S HID Xenon discharge bulb, discharge lamp, 66440ULT, folding carton box (1 unit) - Image 4](https://m.media-amazon.com/images/I/51j7v6GUKiL.jpg) ![OSRAM XENARC ULTRA LIFE D4S HID Xenon discharge bulb, discharge lamp, 66440ULT, folding carton box (1 unit) - Image 5](https://m.media-amazon.com/images/I/515q1vz4pTL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Was easy to replace, nice & bright, no colour difference. *by C***2 on 12 March 2026* Had a light fail on an Audi Q5, replaced it easily with one of these. It was easy to fit, light failure message on the dash cleared, nice bright white light, can’t notice any difference between this and the light on the other side. Very happy, especially not having to pay garage prices to get it replaced! The bulb came in a small box protected by a strong cardboard sleeve over the bulb inside. ### ⭐⭐⭐⭐⭐ Mercedes Benz E350 Coupe A207/ W212 ILS Replace Original D1S Headlight lamps *by F***B on 11 May 2025* Noticed that one of headlights had recently turned pink when I looked back in a multi storey car park. It then failed completely only a few days later. Wanted to replace with a trusted brand and retain the original colour temperature of the headlights which is around 4300 - 4500 Kelvin for best overall night visibility as higher colour temps look whiter but are not necessarily as good for actual night vision. Ordered these Osram Original Xenarc D1S 66140 with the hope that they would be the same as the Mercedes Benz dealer bulbs and low and behold when I removed the cover to replace the original lamp I was greeted with exactly the same Osram 66140 lamp already in place! Now credit must go to Osram as these are the ORIGINAL lamps fitted to the car so that's a very good lifespan.. After looking online I was a bit worried that the replacement process might be a bit torturous but in the end it was very straightforward as I am fortunate to have the access panels with a small thumb turn release, built into the wheel arch liners so really all you need to do is raise the car on the jack to improve the clearance and access the lamps. (It's probably possible to do this without raising the car but it's a bit tight) A quarter turn of the round cover inside reveals the back of the lamp which is easily removed with another quarter turn and the cable disconnects by pressing the small metal clip. Be careful not to touch the new lamp with your fingers as it will shorten the lifespan. There is a plastic ring that unclips from around the buib that you reuse on the new one. Just make sure the small lugs engage in the same place as the original and you're ready to refit the lamp with the same quarter turn. Refit the round cover to seal the headlight against any dirt from the wheel arch . All in all quite easy to do at a massive saving over main dealer cost and the initial impression is better light output than the old lamps. (Follow up: after a three hour night drive and the new lamps are clearly better than the old, main beam in particular, so I should have changed them sooner just as a matter of course) ### ⭐⭐⭐⭐⭐ Good quality for the money *by T***5 on 23 February 2026* Have purchased this bulb few a times now and can’t fault them. Would recommend, good quality. ## Frequently Bought Together - OSRAM XENARC ULTRA LIFE D4S HID Xenon discharge bulb, discharge lamp, 66440ULT, folding carton box (1 unit) - DMEX D4S 35W Xenon Headlight HID Bulbs 8000K White Blue 66440 42402 42402WX Replacement - Pack of 2(Not fit Halogen Headlight Assembly) - PIT66 Headlights Pair w/Bulbs Compatible with Chevy Express 1500/GMC Savana 1500 2003-2014, Fit Chevy Express 2500 3500/GMC Savana 2500 3500 2003-2021 (Smoky Lens Black Housing) --- ## 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.us/products/53780006-osram-xenarc-ultra-life-d4s-hid-xenon-discharge-bulb-discharge](https://www.desertcart.us/products/53780006-osram-xenarc-ultra-life-d4s-hid-xenon-discharge-bulb-discharge) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-21*