OEM direct replacement 25W D8S HID ballast for Ford Focus ST, Mustang, and F-150. Replaces 10R-044663, AA6557900DG, and BM5Z13C170A. 100% plug-and-play. 2-year extended Australian warranty.
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This is the direct OEM replacement for the 10R-044663 (also listed as AA6557900DG and BM5Z13C170A) headlight control module — as fitted to the Ford Focus ST, Ford Mustang (2015+), and Ford F-150 with factory D8S HID headlights.
It restores reliable, flicker-free operation to your factory D8S HID xenon headlight system. No coding, no rewiring — plug straight in and it works.
Common symptoms of a failed 10R-044663 ballast: one headlight flickering, failing to ignite, or a dashboard headlight warning. If the globe has been ruled out, the ballast is the most likely cause.
Important: This is a 25W D8S ballast — not the standard 35W D1S unit. Verify your globe type is D8S before ordering. If your Ford uses D1S globes, you need the 10R-0413266 instead.
1 x Ballast unit. Ballasts do not need to be replaced in pairs — only replace the failed unit.
Key Features
OEM Cross-Reference Part Numbers
Vehicle Compatibility
Always verify by matching the part number on your original unit before ordering.
Not listed? If your original ballast carries one of the part numbers above, this is the correct replacement. Email a photo of your ballast label to [email protected] and we will confirm fitment.
10R-044663 vs 10R-0413266 — Which One Do You Need?
These two Ford ballasts look similar but are not interchangeable. The difference is the globe type and wattage:
Always match the part number printed on the label of your original ballast before ordering.
Is It the Ballast or the Globe?
Before replacing the ballast, swap the working globe from the opposite headlight into the non-working side.
If the light works with the known-good globe, the original globe has failed — not the ballast.
If the light still fails with a known-good globe installed, the ballast is the cause and needs to be replaced.
About Pro Vision Lighting™
Pro Vision Lighting™ has over 20 years of experience supplying OEM automotive lighting to Australian motorists, workshops, and auto electricians. Fast Express Delivery, 2-year warranty, and expert support by phone or email.
TYPE: 10R-044663 HID Ballast Control Module.
APPLICATION: Direct replacement for Ford vehicles using the D8S 25W ballast.
BULB TYPE: D8S HID Xenon ONLY.
POWER: INPUT: 12V DC. OUTPUT: 25W RMS — 40V AC.
CONSTRUCTION: High-grade aluminium casing for optimal thermal management and durability.
SUPPLIED AS: 1 x Unit (Each).
DELIVERY COSTS: Price includes Express Satchel Delivery — generally 1–2 business days Australia-wide.
WARRANTY: 2-year extended warranty.
What vehicles does the 10R-044663 HID ballast fit?
The 10R-044663 fits the Ford Focus ST (2015–2018), Ford Mustang (2015–2017), and Ford F-150 (2015–2017) — all with factory D8S HID headlights. Always verify by matching the part number on your original unit before ordering.
What globe type does the 10R-044663 ballast use?
This ballast is compatible with D8S HID Xenon globes only. It outputs 25W at 42V AC. Do not use D1S globes with this ballast — D1S requires a 35W 85V ballast such as the 10R-0413266.
What is the difference between the 10R-044663 and the 10R-0413266?
The 10R-044663 is a 25W D8S ballast fitted to the Ford Focus ST, Mustang (2015+), and F-150 (2015+). The 10R-0413266 is a 35W D1S ballast fitted to the Mustang (2010–2014), Explorer, Escape, Taurus, F-150 (2009–2014), and various Lincoln, Chevrolet, and Dodge models. They are not interchangeable — always match the part number on your original unit.
How do I know if my Ford has a faulty HID ballast?
Common symptoms include one headlight flickering or not turning on, slow warm-up to full brightness, a headlight cutting out after a few minutes, or a noticeable colour difference between the two headlights. Swap the globe from the working side to the non-working side first — if it still fails, the ballast is the cause.
How long does delivery take in Australia?
Express Satchel delivery generally takes 1–2 business days Australia-wide. Delivery is included in the price — no hidden freight charges.
What warranty is included?
All ballasts from Pro Vision Lighting™ come with a 2-year extended Australian warranty and a money-back guarantee. Free expert advice is available at 1300 775 359 or [email protected].
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