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What bulb for Ford Focus brake light?

When it comes to replacing the brake lights on your Ford Focus, it's important to use the correct bulb type to ensure proper functionality and compliance with local regulations. The specific bulb required for your Ford Focus brake lights can vary depending on the model year and trim level, so it's essential to consult your owner's manual or a reputable automotive parts supplier to determine the appropriate replacement.


Identifying the Correct Brake Light Bulb


The most common brake light bulb used in Ford Focus models is the 921 or 912 LED bulb. These bulbs are designed to fit the standard brake light sockets and provide the necessary illumination for your vehicle's brake lights. However, it's important to double-check the specific bulb size and type recommended for your Ford Focus, as some models may require a different configuration.



  • For Ford Focus models from 2012 to 2018, the recommended brake light bulb is typically the 921 or 912 LED bulb.

  • For Ford Focus models from 2019 and newer, the recommended brake light bulb may be a 921 or 912 LED bulb, but it's best to consult your owner's manual or a parts specialist to confirm the correct replacement.


It's worth noting that some Ford Focus models may also use a combination of LED and incandescent bulbs for the brake lights, so it's essential to inspect the existing bulbs and match the replacement accordingly.


Installing the Brake Light Bulb


Replacing the brake light bulb on a Ford Focus is generally a straightforward process, but it's important to follow the proper steps to ensure a secure and safe installation:



  • Locate the brake light assembly, which is typically accessible from the trunk or rear of the vehicle.

  • Gently remove the old bulb by twisting it counterclockwise and pulling it out.

  • Insert the new bulb into the socket, aligning the tabs, and twist it clockwise to secure it in place.

  • Test the new bulb to ensure it is functioning correctly before reassembling the brake light assembly.


If you're unsure about the process or encounter any difficulties, it's recommended to consult a professional mechanic or refer to your Ford Focus owner's manual for detailed instructions.

What light bulb is best for focus?


Warm white or soft white lights in the 2700K-3000K range can help you relax and get a good night's sleep, while cool white lights in the 5000K-6500K range can boost your productivity and focus. And if you want to take your study setup to the next level, consider the BenQ LaptopBar or e-Reading Desk Lamp.



What brake light bulb do I need for a Ford Focus?


Bosch 566 (P21/4W) Original equipment Car Light Bulbs - 12 V 21/4 W BAZ15d - 2 Bulbs.



Will a 3157 bulb fit a 7443?


No, the 3157 and 7443 bulbs are not interchangeable due to their different base designs and pin alignments.



Can you drive with the brake light out?


Not having brake lights visible comes with penalties, as it's a safety concern. So if you're found to have a brake light out or if it's too dirty to be seen, you could be facing: A verbal warning given by police at the roadside.



What bulbs does a Ford Focus take?


Ford Focus Hatchback (2015-2018) Bulb Size Chart

Headlights (High Beam and Low Beam)(w/ HID Headlamps)H13 (9008)
Door Mirror Illumination LightT10 (194 168)
Turn Signal Light (Front)7443 (7440) OR BAU15S (7507 PY21W)
Glove Box Light (2016-2018)T10 (194 168)
Parking LightT10 (194 168)



How do I know what bulb fits my car?


Every headlight is designated with a bulb size. For a bulb installed in your car, you can find the number stamped or printed on the side of the bulb. It's also listed in the service manual and in an auto bulb guide. Only the correct bulb size will fit in the headlamp housing and connect to the factory wiring.



Can I replace a brake light bulb myself?


You don't have to take your car to the mechanic for a brake light replacement. This simple process is one that you can take care of yourself. Not only is a tail light replacement an easy maintenance task, but it's also relatively affordable.



Are brake light and tail light the same bulb?


Tail lights and brake lights are part of one assembly, and many vehicles use the same bulb for both. However, they don't serve the same purpose.



What bulb do I need for brake lights?


Brake lights are available as LED or halogen, usually in P21/5W and P21W fittings. Please check your vehicle handbook or use our Bulb Finder to find out which fitting your car needs - different vehicles use different fittings.



How do I know what brake light to buy?


Use the information provided in the car manual
It will have different sections to explain the working, maintenance, and specifications of each component. Reading this manual carefully will help you to buy the right kind of brake light bulb that corresponds to the socket.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.