The typical arrangement for a 2015 Altima is front turn signals that use 7440 or 7443 bulbs and rear turn signals that use 3157 bulbs (all in amber). Verify the exact size for your vehicle by checking the owner’s manual or inspecting the current bulb in the housing, since markets and trims can vary.
Bulb sizes by position
Below are the sizes you’ll most often encounter on a North American-spec 2015 Nissan Altima. Markets with different lighting regulations or trims may use alternative part numbers.
Front turn signals
Common sizes for the front indicators on a 2015 Altima are listed here.
- Front left and front right turn signals: 7440 (amber) or 7443 (amber)
Note: Some aftermarket or dealer-sourced bulbs may be labeled differently; ensure the replacement matches the base type and color required for your state or country.
Rear turn signals
Common sizes for the rear indicators on a 2015 Altima are listed here.
- Rear left and rear right turn signals: 3157 (amber)
Note: Certain markets or trims may use 3157A or equivalent amber variants; confirm with the manual or by inspecting the current bulb.
How to confirm and replace
If you’re unsure which bulb you have or you’re upgrading to LEDs, use these steps to verify and replace safely.
- Open the hood and locate the front marker/turn signal sockets, or remove the rear bumper/taillight cover as needed to access the bulbs.
- Turn off the ignition, remove the bulb retainer or twist the bulb housing to release the bulb, and read the markings on the bulb or socket.
- Match the markings to the owner’s manual or a reliable parts diagram for your exact trim and market.
- Purchase a replacement that matches the base and color (amber) and install it following the reverse steps, testing the signal before sealing the housing.
Replacement notes: If you switch to LED replacements, you may need resistors or a CAN-bus-compatible kit to prevent residual mall signals or bulb-out warnings.
Additional considerations
Always ensure the correct color and brightness for turn signals, as some jurisdictions require amber lighting. If you’re unsure about compatibility, consult a Nissan dealer or a qualified automotive technician.
Summary
For a 2015 Nissan Altima, the front turn signals typically use 7440 or 7443 amber bulbs, while the rear turn signals use 3157 amber bulbs. Verify with the owner’s manual or by inspecting the existing bulb, as variations can occur by market or trim. When replacing, follow standard safety steps and consider LED upgrades only with proper compatibility to avoid electrical issues.