The rear turn signal on a 2019 Jeep Wrangler is typically a 3157 dual‑filament bulb (3157 or 3157A for amber). Some trims with LED tail lights use non-replaceable LED modules instead of a replaceable bulb.
Understanding the Wrangler’s rear lighting options
2019 Wrangler models (JL generation) offer both incandescent and LED tail-light configurations depending on trim and market. Knowing which system you have helps determine whether you need a replaceable bulb or a whole LED module.
Incandescent vs LED tail lights
Most Wranglers with incandescent rear taillights use a 3157 dual‑filament bulb for the rear turn signal. If your vehicle has LED tail lights, the rear signals are often built into an LED module, which means you replace the module rather than a single bulb.
What to buy if you have incandescent tail lights
For Wrangler models with incandescent rear taillights, the rear blinker is typically a 3157 dual‑filament bulb. If you prefer amber illumination for the turn signal, you may choose the 3157A variant. Always confirm the exact bulb type for both sides, as there can be slight differences by trim or region.
Common bulb options you might encounter include:
- 3157 dual‑filament bulb (12V) — standard for many Wrangler JL models with incandescent tail lights.
- 3157A amber‑tinted variant — used when amber turn signals are required or preferred visually.
- LED replacements — if you have LED tail lights, replacement bulbs are often not used; LED modules are replaced as units.
Note: Before purchasing, verify the exact bulb size and compatibility by checking the owner's manual, removing the taillight lens to view the bulb base, or contacting a Jeep dealer with your VIN.
How to verify the correct bulb on your Jeep
To ensure you purchase the correct bulb, perform a quick inspection and confirm the part number. The process is straightforward and involves accessing the rear taillight housing.
- Open the rear tailgate and locate the screws or clips holding the taillight housing in place.
- Carefully remove the housing cover to expose the bulb(s).
- Inspect the bulb base and markings; the common size is 3157 for dual‑filament bulbs, with 3157A for amber variants.
- Check both sides; most Wranglers use the same size on both sides, though rare trims may vary.
If you’re unsure, consult the manual or a dealership; some configurations require LED module replacements rather than bulbs.
Summary
For most 2019 Jeep Wranglers with incandescent rear taillights, the rear blinker uses a 3157 dual‑filament bulb (3157 or 3157A for amber). If your Wrangler has LED tail lights, there is no replaceable bulb—LED modules are replaced as a unit. Always verify the exact configuration for your trim and market, and consult the manual or a dealer if in doubt.