The rear blinker on a 2017 Toyota Tundra is most commonly a dual‑filament 3157‑type bulb (amber for the turn signal). In North American models, the 3157 or its amber variant (3157NA/3157A) is typically used, though some regional builds can differ—always verify by inspecting the existing bulb or your owner’s manual.
The 2017 Tundra’s rear turn signal shares the same housing as the tail light in the rear combination lamp, so replacement bulbs are selected to fit that dual‑filament design. This guide outlines the typical bulb types and how to confirm the correct one, along with replacement steps and tips.
Bulb type and identification
Here are the bulb types you’re most likely to encounter for the 2017 Tundra rear blinker. Use the following options to identify the correct replacement for your specific vehicle and market.
- 3157 (dual‑filament, amber) – the most common choice for the rear turn signal and tail light on many 2017 Tundras.
- 3157NA / 3157A – amber variant commonly labeled for North American markets; essentially the same base with amber color.
- 7443 (dual‑filament) – occasionally seen in certain regional builds or specific tail light assemblies; verify compatibility before purchasing.
Because base types can vary by trim, production date, or market, the safest method is to remove the current bulb and compare the base, or consult the owner’s manual and the vehicle’s fuse/relay diagram to confirm the exact replacement.
How to replace the rear blinker bulb
Follow these steps to replace the rear turn signal bulb once you’ve identified the correct type.
- Park the vehicle, switch off the ignition, and engage the parking brake.
- Access the rear light cluster by opening the tailgate or removing any exterior covers if necessary.
- Remove the lens or housing screws/clips and gently detach the rear light assembly.
- Twist the bulb socket counterclockwise to release it from the housing, then pull the old bulb straight out.
- Insert the new bulb (3157 or the correct variant), ensuring the dual filaments align with the socket pins.
- Reinstall the socket into the housing, reattach the lens/assembly, and test the turn signal from inside the vehicle.
Handle bulbs with care, avoiding contact with skin or oils. If you’re upgrading to an LED replacement, ensure the kit is CAN bus compatible to prevent hyper‑flash or warning lights.
Tips and common pitfalls
- Double‑check the bulb fitment before purchasing; a misfit base will not seat properly or may be unsafe.
- If the turn signal and taillight share the same bulb, ensure you’re replacing the correct dual‑filament bulb and not a single‑filament accessory bulb.
- After replacement, test all functions (left/right turn signals, running lights, and brake/taillight) to confirm proper operation.
Summary
For the 2017 Toyota Tundra, the rear blinker is typically a dual‑filament 3157‑type bulb, with amber variants like 3157NA commonly used in North America. Confirm the exact base by inspecting the bulb in your truck or consulting the manual, then replace with the correct 3157/3157NA (or the appropriate variant) and test to ensure proper operation. If you choose an LED alternative, select a CAN bus‑compatible kit to avoid electrical issues.