Used for: Back Up Reverse Light Bulb
Used for: License Plate Light Bulb
Used for: License Plate Light Bulb
Used for: Parking Light Bulb(without adaptive lighting), Side Marker Light Bulb Front(without adaptive lighting)
Used for: Turn Signal Light Bulb Front(without adaptive lighting), Turn Signal Light Bulb Rear
Used for: Dome Light Bulb, Map Light Bulb, Trunk or Cargo Area Light
This 2018 Mazda CX-9 bulb size page helps you verify the correct bulbs by lighting position, so you can match the right fit before you buy. Because the CX-9 uses different bulbs depending on the lamp location and whether the vehicle has adaptive lighting, checking the exact position matters.
Use this guide to look up common exterior and interior bulb types for the 2018 Mazda CX-9, including headlights, fog lights, turn signals, reverse lights, map lights, dome lights, and license plate lights. It is a practical reference for quick replacements and for comparing the bulbs already installed on your vehicle.
Fitment can vary by trim, lighting package, market, and body style, so always confirm whether your CX-9 has adaptive lighting or a non-adaptive setup before ordering. Some positions on this model use LED assemblies, while others use replaceable halogen-style bulbs such as 921, 7440A, DE3175, 2825/98, and 2827. If you are considering an aftermarket LED conversion, make sure the bulb base, length, and polarity are compatible, and watch for warning lights or beam pattern issues. The safest approach is to check the bulb currently installed in the vehicle and compare it with the chart before purchasing replacements.
The 2018 Mazda CX-9 uses LED headlight units for both the high beam and low beam positions. These are not listed as a separate replaceable bulb size on this page.
Yes. With adaptive lighting, the front turn signal bulb is LED. Without adaptive lighting, the front turn signal bulb is 7440A.
With adaptive lighting, the front parking light bulb is LED. Without adaptive lighting, the front parking light bulb is 2827.
The rear turn signal bulb is 7440A.
The back up reverse light bulb is 921.
The license plate light bulbs are 2825 and 98.
Those interior positions use DE3175 bulbs.
The brake light bulb and tail light bulb are listed as LED on this page, so they are not shown as standard replaceable bulb sizes.
Yes. The daytime running light bulb is listed as LED.
Check whether your CX-9 has adaptive lighting, then confirm the exact lamp position and compare the installed bulb with the chart. Trim and lighting package differences can change the correct fitment.
Some positions may be converted with aftermarket LED bulbs, but the bulb base, size, and electrical compatibility must match. You should also verify beam pattern and whether the vehicle may need additional resistors or error-free bulbs.
Mazda used different lighting setups depending on trim, package, and market. That is why the same year and model can have different bulb types in the front lighting area.
