Daytime running lights on the Mazda CX-5 are designed to operate automatically in daylight when the ignition is on and the lighting control is set to Auto or On. There is no separate DRL switch to flip in most trims.
How DRLs work in the CX-5
In recent Mazda CX-5 models, daytime running lights are a built-in feature that activates without you needing to manually enable them. They typically illuminate when the engine is running and the headlight control is in the Auto or On position. When ambient lighting requires it, the system may also bring on the main headlights automatically if configured to do so.
DRLs vs. headlights
DRLs are distinct from the main headlights. They provide daytime visibility and run at a lower intensity than low-beam headlights. In low-light conditions or at night, the vehicle’s low-beam headlights (and other lighting as appropriate) take over automatically when Auto is selected.
Step-by-step: ensuring DRLs are active
There is no dedicated DRL toggle in most CX-5 models. Use these steps to ensure the system is engaged and functioning in daylight.
- Start the engine or switch the ignition to RUN.
- Turn the headlight control to AUTO. If your model provides a separate On position, set it to On.
- Make sure the ambient light sensor is unobstructed (not shaded by mud, snow, or overhanging objects) so the system can read daylight accurately.
- Drive in daylight and observe the front of the vehicle; the daytime running lights should be visible in the headlamp assemblies while the main beams remain off unless needed.
In practice, most CX-5 owners will notice DRLs coming on automatically as soon as the engine runs and the switch is in Auto/On, with no extra steps required.
Troubleshooting: DRLs not turning on
If daytime running lights don’t illuminate in daylight, consider these possibilities to diagnose the issue:
- The headlight switch is not in AUTO or On; switch it to AUTO/On.
- The ambient-light sensor is blocked or malfunctioning, preventing automatic activation.
- A fuse, wiring, or software issue affecting the lighting system exists; consult the owner's manual or a Mazda dealership for a diagnostic check.
- There may be model-year or regional variations in DRL behavior; some trims may integrate DRLs with the low beams or have different default settings.
If the DRLs still don’t work after these checks, arrange a service appointment with a Mazda dealer to inspect the lighting system and update any software if necessary.
What to expect visually
Daytime running lights on the CX-5 typically appear as bright white lights within the headlamp housing during daylight. They are designed to be less intense than the vehicle’s main low-beam headlights and do not replace them. In brighter conditions, DRLs stay on to enhance visibility of the vehicle to others on the road.
Summary
For the Mazda CX-5, turning on daytime running lights is usually automatic. To ensure DRLs are active, simply start the engine and set the headlight control to AUTO (or On, if preferred). There is no separate DRL switch to enable in most trims. If DRLs do not appear in daylight, check the headlight switch position, ambient-light sensor, and fuses, and consult a dealer if problems persist. Regular daytime driving should benefit from the built-in DRL system without extra steps.