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Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - Amber Lens

Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - Amber Lens

Item # MC48AB
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Shipping Weight: 0.09 lbs
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MC48AB - Rear Clearance,Side Marker Optronics Trailer Lights
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3-15/16" x 1-7/8" Rectangle. Incandescent trailer light serves as either a side marker light or a clearance light. Built-in reflector. Durable ABS base. Twist-in bulb socket. Surface mount - hardware not included. 2-Wire design. P2 rated. Lowest Prices for the best trailer lights from Optronics. Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - Amber Lens part number MC48AB can be ordered online at etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (299)
  • Q & A (12)
  • Photos
  • Why etrailer?

Optronics Trailer Lights - MC48AB

  • Clearance Lights
  • Rectangle
  • Incandescent Light
  • Amber
  • 4L x 2W Inch
  • Surface Mount
  • Rear Clearance
  • Side Marker
  • Non-Submersible Lights
  • Optronics

3-15/16" x 1-7/8" Rectangle. Incandescent trailer light serves as either a side marker light or a clearance light. Built-in reflector. Durable ABS base. Twist-in bulb socket. Surface mount - hardware not included. 2-Wire design. P2 rated.


  • Incandescent trailer light functions as either a side marker or clearance light when properly mounted
  • Built-in reflex reflector removes the need for a separate reflector
  • Incandescent bulb can be easily replaced
  • Durable ABS plastic base
  • Amber lens over incandescent bulb
  • Compatible with 12V DC electrical systems
  • Surface mount on trailer - mounting hardware not included
    • Twist-in socket secures bulb in place
  • 2-Wire design with power lead and ground wire
  • DOT compliant
  • P2 rated


  • Dimensions: 3-15/16" long x 1-7/8" tall x 1/2" deep
  • Distance between mounting holes (center on center): 3-3/8"
  • Bulb type: 194
  • Power draw at 12.8V: 0.2 amps
  • 3-Year warranty

Manufacturer Cross Reference
Light will work as an exact replacement for:
Uni Bond # ML2044A
Peterson # M132A
Bargman # 30-68-511

Optronics MC48 Series Amber Marker Clearance Light with Reflex Dimensions

P2-Rated Lights

Diagram of light spread for P2 rated light

A P2-rated light produces a 45-degree angle of light to either side of its centerline for a total of 90 degrees of coverage. This beam pattern can be seen straight on, but it cannot be seen clearly from the side. So this type of light can be used as either a side marker light or a clearance light, but it cannot function as both. If you need both functions, then you must install 2 separate lights on your trailer - one as a front or rear clearance light and one as a side marker light.

MC48AB Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - Rectangle - Amber Lens - P2 Rated

Alternate part number: MC-48AB

California residents: click here

Customer Reviews

Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - Amber Lens - MC48AB

Average Customer Rating:  4.9 out of 5 stars   (299 Customer Reviews)

3-15/16" x 1-7/8" Rectangle. Incandescent trailer light serves as either a side marker light or a clearance light. Built-in reflector. Durable ABS base. Twist-in bulb socket. Surface mount - hardware not included. 2-Wire design. P2 rated.

- MC48AB

These are a direct replacement on my 1998 Chinook Premier. I assume for other years of manufacture as well. The entire lamp is included with a bulb. I did not have to crimp on the bulb socket wires as the original bulb holders are in fine shape and will twist on to the new sealed lens and base combo. They mount in the original screw holes with a new thick foam gasket. Reuse the original screws. I am replacing all the front amber lamps and all the rear red ones as a good practice on a 18 year old vehicle. Now I have spare bulbs and sockets in my inventory of RV stuff

Works just fine and lasts a long time.
Doug T - 06/23/2017

- MC48AB

Searched everywhere for this lens...you were the only place to have it. Service was excellent and very timely.

Still great...bought a spare but so far haven’t had to use it
Steve C - 04/03/2021

- MC48AB

I am very please it the right one for my Rv thank you

- MC48AB

I ordered and received 6 Optronics amber clearance lights for my 1994 Avion 5th wheel trailer they were exact replacements for the original lights and installed without any problems. They were shipped and received very quickly and in good condition. Thanks for your help.

- MC48AB

This was the perfect place to find this marker light. I searched numerous stores for the light assembly and was unable to find a replacement for my broken one on my older RV. The shipping of the item was faster than anticipated and I had it in a couple days. I'd highly recommend etrailer to my friends if they were in search of similar items.

Still the perfect replacement marker light for the RV absolutely no problem with the light after a year.
Kenenth - 08/30/2020

- MC48AB

These clearance lighrs were an exact replacement to the origional clearance lights on my 2004 Chinook motorhome.

- MC48AB

Got the marking light Friday May 7. Didn't get gutter spout until Saturday. Wasn't time to install as we were leaving early Saturday for a week at Charleston S.C. Thanks for your help.

- MC48AB

Perfect fit. Even came with new bulb and wiring pigtail. Did not need to use the pigtail because the original used the same connector assembly as the new market light. Will be ordering a rear taillight very soon and will likely upgrade to led lights. Etrailer took the SAE numbers from the lens cover and matched it wit ease. Great service!!

- MC48AB

Awesome replacement for the Bargman 68 lights. Seem to be of durable material. Mounting holes lined right up!

Lights are still working great. No visual defects either. I do cover in winter months.
Neil B - 04/23/2020

- MC48AB

Really like the bat wing on my Yamaha. Nice fit, not perfect, but for the price it can't be beat.

- MC48AB

Perfect fit for my 2004 Fleetwood Bounder. Easy install. Bought four. Two red and 2 amber.

- MC48AB

I spent a good amount of time trying to find the exact replacement lights for my Motorhome. Finally found them at etrailer. Ordering was easy and they arrived in a few days just as described. I'll bookmark this site and order from them again.

- MC48AB

After a year they still look brand new. Great lights, totally happy.

- MC48AB

I shopped Atwood’s, Autozone and O’riley’s and could not find these lights and anything they had was twice the price and I would have needed to drill additional holes and rewire, these replaced the old ones perfectly as original (side clearance lights Allegro Bus motor home) . Thank You, I will be back.

- MC48AB

I bought these to replace the lights with cracked lenses that had cracked from age on my travel trailer. They were a prefect match to what was there previously and have worked great!

- MC48AB

The amber lens fit perfect on my rv prowler trailer and match’s the other lights was easy to install

- MC48AB

Great Product. Installation was simple everything lined up perfectly no drilling or modifying. Looks great! I would highly recommend this product to anyone thinking about ordering. Thanks etrailer. Brad Brandt Woodbury, Mn.

- MC48AB

Matched my original lights for my 97 Coachman RV

- MC48AB

Having an old motorhome, I wasn’t sure I would find a replacement light. But happily etrailer had just the model I needed in stock. And it was delivered, well packed, in just a couple of days. I highly recommend etrailer!

- MC48AB

Great product, ordered 3 first time as they claimed to be exact replacements for my older model DP motorhome. They fit perfect right out the box and are very bright, so I ordered more to replace every marker light on the Coach and several more for spares. A great product and couldn't beat the sellers price.

- MC48AB

Perfect fit, identical to onesbeing replaced. Looks sharp!

- MC48AB

works as described exact OEM for 1998 Tiffin Allegro Class A RV Bulb and space for bulb could be bigger for a brighter illumination as I normally replace all my bulbs with larger/brighter/less juice need LED bulb, but this standard illumination is bright enough.

- MC48AB

Fits a 2000 Floe snowmobile trailer with no modifications needed

- MC48AB

Fast Service. Good product.

- MC48AB

I spent hours literally going through pages trying to find these lights thinking they would be easy thing to find since my motorhomes not that old no one around here had them! As I said earlier I spent a couple hours searching the internet everybody just had pictures of the lights with no 360 view , found them one place but there is no description or other views of the light. Was about to give up when I came across your site. I was really impressed about the description video of the lights not sure if you do that with every product be a lot of videos.hehe ! But it sure helped me! I'm sure it took you guys a lot of time to do those videos but to let you know you've gained a customer for life!! I will always check you first before I go anywhere!! thank you for all your great service be seeing you soon!

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Info for this part was:

Employee Patrick B
Video Edited:
Patrick B
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
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Employee Brian T
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Employee Cole B
Installed by:
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