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Replacement Light Bulb # 1157

Replacement Light Bulb # 1157

Item # A1157B
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Optronics Trailer Lights - A1157B
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Optronics Accessories and Parts - A1157B

  • Trailer Lights
  • Light Bulbs
  • Optronics
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Replacement light bulb 1157


  • Replacement bulb part #1157
  • 8.3 Watts for tail light function
  • 26.9 Watts for stop/turn function

A1157B Replacement Light Bulb # 1157

Alternate part number: A-1157B

California residents: click here

Customer Reviews

Replacement Light Bulb # 1157 - A1157B

Average Customer Rating:  4.8 out of 5 stars   (65 Customer Reviews)

Replacement light bulb 1157


I have a 2019 Dodge Ram with a trailer hitch and trailer wiring receptacle
that did not fit into the plug in receptacle.
For about x.xx I purchased a 7 blade adapter from [online store] to fit into the hitch brake plug.
I like this product very much and feel much safer with the extra brake light that works exactly like advertised.
Very happy and I could not beat the price.


just received my lights for my boat trailer yesterday and everything works great lights seem well made and very easy to install. Lights were well packed and shipping was fast very satisfied with the purchase. What is best of all is the customer service you dont find service like the folks at etrailer so hats off to George and the rest of the crew there at etrailer.

Everything still works fine no problems and thank you for your great customer service have told all my fishin buddies about etrailer and how good the experience was and the customer service so you will be getting customers from my end for sure thanks again to all of you guys at etrailer.
Mikey-D - 07/11/2018


Fast delivery and only location to have these tail light boxes. You all rock!!


Still Working after a year.


It's a bulb it worked as you would exp ect.


On time and correct lights for my trail er.


I bought replacement Wesbar tail lights for my boat trailer. I think your website is excellent (informational and no doubt what replacement lights I needed), shipping was fast, everything fine.

The tail light still works like a charm but doesnt help me catch fish!
paul f - 05/21/2018


Own a Yukon camper trailer from the 1980s and was happy to be able to order and receive exterior lamp bulbs without delay. In fact, I received my order 2 days sooner than I'd expected.


Perfect fit. Good product description so felt confident ordering on internet.

All parts installed and still working fine
Lucy N - 10/10/2017


This is a two filament bulb for the tail light and brake/turn signal.

Still good
Theodore - 02/20/2021


Just picked up a couple of utility trailer lights..etrailer was GREAT to deal with...
Instructional/comprehensive videos and many Q&A's pertaining to my purchase were provided which made my install a snap! Good folks!
Thank You etrailer


I've bought a few items from etrailer. Each item is of great quality and a fair price. Delivery of all items has always been timely and never a fouled up order. Great people to deal with and excellent quality of all products.


Speedy delivery - they arrived before I've been able to use them - so my 4 star rating is reflective of this review being incomplete. All products in my order look to be intact and in new condition so I expect they will work well when I finally get around to mounting them on my utility trailer.


Everything came as advertised and in new condition. I am very satisfied with I got just what I needed and at a great price! Could not be happier


In perfect working order and the price was very reasonable. I would highly recommend using for all your trailer needs. They provide outstanding customer service!!! Their price can't be beat compared to any other part store that I looked at.


My etrailer products I have ordered have and continue to be good products at reasonable pricing. I look forward to doing business with etrailer again as I am sure I will have a need for more items.


Products exactly as ordered. Very fast shipping. After I ordered, I realized there was another item I wanted. I called the 800 number and Steffen was a great help, cancelled the current order, placed everything in a new order and added the new item I wanted. Allowed me to get the savings due to order value.
Great service.


Outstanding customer service!!! Great products at an excellent price. etrailer is my go to trailer supply. Thanks for your fantastic service.


I have purchased products from etrailer several times. They deliver good equipment on time at a good price.


The bulbs were delivered in a timely manner and as advertised.


Just a bulb, but I wouldn't be able to tow the trailer without it.


Timely delivery of products with a very reasonable shipping fee.
Already shopped with this vendor again


Fantastic company! Amazing prices, shipping and customer service


Love etrailer!


Great product, fair price. Would order again

Show More Reviews

See what our Experts say about this Optronics Accessories and Parts

  • Which Filament in Optronics Bulb # A1157B is Used for the Turn Signal
    The Optronics 1157 Replacement Bulb, part # A1157B, and similar dual-filament bulbs have two different filaments. One filament is of a different resistance value, and thus makes a brighter light. That is why one bayonet on the bulb casing is at a different position than the other bayonet - so that you dont install the bulb the wrong way. The basic filament usually on the brown wire is running lights, the other filament usually green or yellow depending on which side of trailer has different...
    view full answer...
  • Comparing Optronics Replacement Trailer Light Bulbs 1157 and 2057
    The Optronics replacement bulb, # A1157B (or 1157) are dual filament bulbs. The double-filament design works for combination brake, tail and turn lights. You can also use # ARC85FR for a LED upgrade. The 2057 bulb that comes in some light fixtures is not as bright as the 157 bulb.
    view full answer...
  • Is a Specific 1157 Light Bulb Used for Boat Trailer Tail Lights
    Yes, you should be able to use any 1157 bulb, such as # A1157B. So long as it is an 1157 bulb it will fit the socket and light up properly.
    view full answer...
  • Why Does the Replacement Bulb # A1157B Illuminate Bright or Dim Depending on Orientation
    The # A1157B that you referenced is a dual intensity bulb. Depending on which circuit you connect to on the light you could illuminate either the low or high intensity. What I would recommend you do is activate the running lights of the trailer you are installing this bulb into and then install this bulb in the orientation activates the dimmer illumination. Then check to make sure it gets brighter when the brakes are applied.
    view full answer...
  • How to Identify Correct Replacement Bulb for RV Porch Light
    If you can find a bulb number on your porch light's original bulb we may not need you to submit a photo. Most smaller incandescent bulbs will have a number printed right on the bulb glass or stamped into the metal base, such as on part # A1157B, which is an 1157 type bulb. If you can find a bulb number simply enter that into our search box to see replacement parts. Depending on the bulb required we may be able to offer you an LED equivalent that will produce less heat and use only about...
    view full answer...
  • Tail Light on Trailer Not Working After Installing New Bulb
    If all of the other lights on your trailer are working correctly except the new 1157 bulb that you installed, like part # A1157B, then either the wiring to your light housing is bad, or the housing itself is bad. Check the wiring for the housing to make sure that it is not corroded, bent, damaged, or exposed, and also make sure that the ground is securely connected to a clean, bare metal surface. If all of that looks good then the housing is probably bad and needs to be replaced. I...
    view full answer...
  • How to Remove and Install 1157 Bulb From Trailer Lights
    For an 1157 bulb like the # A1157B, in order to remove the old one you'll want to gently push down on the bulb while twisting the bulb 1/4 turn counterclockwise. You should then be able to pull the bulb from the socket. When replacing the bulb, align the dual notches on the base of the replacement bulb to the grooves inside the socket.
    view full answer...
  • What Causes Light Activation Delay on RV
    Typically light activation delay is due to a bad switch or a loose connection in the wiring of the light circuit. It's not usually related to the wrong bulb being used. I'd first check the condition of the switch looking for any corrosion and then check the wiring.
    view full answer...
  • Replacement Bulb for Wesbar Submersible Low Profile Trailer Tail Light # 403076
    Wesbar Submersible Low Profile Trailer Tail Light # 403076 uses an 1157 bulb, # A1157B.
    view full answer...
  • Recommended Replacement Light for Wesbar Trailer Light
    The Wesbar Submersible Low Profile Trailer Tail Light # 403076, which you referenced, uses the replacement Light Bulb number 1157. That part number is # A1157B. If you have a different taillight and you can provide the part/model number I will be glad to find a replacement bulb for you.
    view full answer...
  • Replacement Bulb for Wesbar Submersible Low Profile Trailer Tail Light Part # 403076
    Yes, you can replace just the bulb in your tail light without having to replace the entire assembly. If you have the Wesbar Submersible Low Profile Trailer Tail Light part # 403076 then you would want to use part # A1157B. If you have a different tail light then please remove the lens and send me a photo of the bulb or look for a bulb number on the base. I could then use this to offer the correct replacement bulb for you if the above is not it.
    view full answer...
  • Replacement Blinker Bulb for Peterson Round Trailer Light Part Number 431800
    According to my information the replacement bulb you will need for the # 431800 is bulb number 1157. We offer this replacement on our site under # A1157B.
    view full answer...
  • Troubleshooting 1157 Replacement Light Bulb That Will Not Illuminate
    An 1157 bulb like # A1157B installs by rotating it in the socket so that the two small tabs on its base lock into place. This makes the ground connection. The bottom of the bulb's base has a contact for the +12V input. Please check that the bulb is fully inserted and rotated into its locked position. If you see any discoloration at all on the socket - even slight greenish or whitish discoloration - this can indicate corrosion that could be interfering with power reaching the bulb. You...
    view full answer...
  • Are Bulbs Replaceable In Wesbar Low Profile Trailer Tail Light 403076?
    The bulbs in the Wesbar Low Profile Trailer Tail Light - Submersible - 7 Function - Incandescent - Passenger Side # 403076 you were looking at are replaceable by the 4 screws holding the lens on, and then removing the capsule inside as shown at the 2:55 minute mark of the included video. For a replacement bulb you will need the # A1157B.
    view full answer...
  • Wiring the Wesbar Submersible Low Profile Trailer Tail Light Right Side # 403076 To A Trailer
    The Wesbar Submersible Low Profile Trailer Tail Light Right Side, part # 403076 has 3 wires coming out of the back of the light. The white wire would be for ground. The brown wire would be for the running lights and the green wire is for the right turn signal and brake. The light is sealed in the # 403076 tail light, but it does NOT have a replaceable capsule like on the older generation of Wesbar submersible low profile lights. The capsule in this # 403076 tail light has four screws that...
    view full answer...
  • Bulb Replacement Part Numbers for 432400 Peterson Square Trailer Tail Light
    The part numbers for replacement bulbs for the 432400 taillight lens are, A1157B for the stop, turn and taillights. The side marker lamp replacement is A194B.
    view full answer...
  • Are the Bulbs or Just the Capsule Replaceable in the Wesbar Trailer Tail Light # 106411
    I went out to the warehouse and pulled a Wesbar trailer light, # 106411, to examine it more closely. After taking it apart I found that you can replace just the bulbs inside the capsule. The same goes for # 106410. The larger bulb is an 1157 bulb, # A1157B, and there can also be a smaller bulb labeled as C193. I made a short video showing the light taken apart for you.
    view full answer...
  • Installation Details for RoadMaster Tail Light Wiring Kit with Bulbs # RM-155 on 2008 Buick Enclave
    You will need to drill a 1 inch hole behind the red lenses on your 2008 Buick Enclave. The RoadMaster Tail Light Wiring Kit with Bulbs, # RM-155 uses standard # 1157 (# A1157B) automotive bulbs which measure 1.83 inches tall and 0.97 inches wide. The sockets measure 0.95 inches where they attach to the taillight housing. Roadmaster says to drill a 1 inch hole in the taillight housing behind a red lens to fit the socket. Once the bulb is inserted in the socket it requires 1/4 inch clearance...
    view full answer...
  • Changing the Bulb in the Wesbar Tail Light Capsule
    The older generations of the Wesbar submersible low-profile lights came with sealed light bulb capsules that are not replaceable. If your capsule is sealed, then your best option is to replace the lights with new lights like part # 403026 and # 403076. The new lights come with capsules that allow you to replace the bulbs. The bulbs used in these lights are # A1157B and # 193.
    view full answer...
  • Replacement Bulb Recommendation for Wesbar Trailer Tail Light 106410
    The part number # 102641 that you referenced is for a replacement lens for the part # 106410 that you also referenced. The capsule inside the assembly should allow the bulb to be easily replaced. The capsule is held on there by four screws, so if you ever need to change out the bulbs, just undo those four screws, the capsule will pop right off, giving you full access to replace and change the bulbs as necessary. For a bulb you would want the part # A1157B. Check out the review video I...
    view full answer...
  • Fitment and Parts Included for Wesbar Trailer Lights 403026 & 403076
    Yes the Wesbar left side trailer light # 403026 and the right side # 403076 are the correct replacements for the Wesbar light you referenced and they will come with bulbs already included. What makes these different than the old generation Wesbar light, is there is no longer a replaceable capsule that contains the bulb that needs to be replaced. You will only need to replace the bulb itself because the unit is now sealed. If you are in need of a replacement bulb for this unit that is...
    view full answer...
  • Can 1157 Light Bulbs Be Used on Boat Trailer
    As long as the existing light housings on your boat trailer are compatible with 1157 bulbs # A1157B, they will work just as well as a 2057 bulb. One light that the 1157 bulb is designed as a replacement for and that will work well on a boat trailer is the Wesbar Submersible Low Profile Trailer Tail Light, Left Side # 403026 and Right Side # 403076.
    view full answer...
  • Do Wesbar Submersible Low Profile Trailer Lights Include Bulb
    The Wesbar Submersible Low Profile Trailer Tail Light # 403026 for the Driver Side and # 403076 for the Passenger Side do include the bulb assembly. If they ever need to be replaced though you can use part # A1157B. I have attached a few short video demonstrations on these trailer lights that you can also check out.
    view full answer...
  • Can 1141 LED Bulb Replace 93 Incandescent
    93 bulbs and 1141 are compatible replacements for each other so if you have a 93 you could use the part # AR50367 for a soft white LED replacement.
    view full answer...

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