bing tracking image
  1. RV Vents and Fans
  2. Ventline
  3. Roof Vent
  4. Replacement Lid
  5. Black
Replacement Plastic Dome Assembly for Ventline Vanair Trailer Roof Vent

Replacement Plastic Dome Assembly for Ventline Vanair Trailer Roof Vent

Item # BVA0502-03
Our Price: $23.45
You Save: 31%
RV Vents and Fans
Orders above $50 qualify for Free Shipping
Shipping Weight: 0.42 lbs
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos


Need help with installation?
Locate installers near me
Replaces a broken plastic dome assembly on your Ventline Vanair roof vent for motor homes and enclosed trailers. The dome assembly seals the vent when it is closed. Great Prices for the best rv vents and fans from Ventline. Replacement Plastic Dome Assembly for Ventline Vanair Trailer Roof Vent part number BVA0502-03 can be ordered online at or call 1-636-306-4830 for expert service.
  • All Info
  • Reviews (98)
  • Q & A (0)
  • Videos (1)
  • Photos
  • Why etrailer?

Ventline RV Vents and Fans - BVA0502-03

  • Roof Vent
  • Replacement Lid
  • Black
  • Ventline

Replaces a broken plastic dome assembly on your Ventline Vanair roof vent for motor homes and enclosed trailers. The dome assembly seals the vent when it is closed.


  • Replaces dome assembly
  • Works with Ventline Vanair roof vent model VP-543
  • Smoke color
  • Measures 8-1/2" overall
  • Measures 1-3/4" high
  • Made in the USA

diagram of placement of replacement dome

BVA0502-03 Ventline Smoke Plastic Dome Assembly for VP-543 Vanair Roof Vent

Video of Replacement Plastic Dome Assembly for Ventline Vanair Trailer Roof Vent

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Ventline RV Vents and Fans - Roof Vent - BVA0502-03 Review

Speaker 1: Today we're taking a look at the Replacement Plastic Dome Assembly for Ventline Vanair Trailer Roof Vents. This replaces a broken assembly for your roof vent. It works with Ventline Vanair roof vent model VP-543. The dome assembly seals the vent when it is in the closed position. It's smoke in color, and it does come with the foam gasket pre-installed here at the base, and it comes with the necessary mounting hardware.A few measurements to go over with real quick, starting with the overall diameter. Outer edge to outer edge measures 8 and 1/2 inches.

The overall height is at 1 and 3/4 inches tall. You'll notice that is has two mount holes. Those mount holes are separated on center by about 6 and 1/2 inches, and the product is made in the USA. That's going to do it for today's look at the Replacement Plastic Dome Assembly for Ventline Vanair Trailer Roof Vents.

Customer Satisfaction Score:

Customer Reviews

Replacement Plastic Dome Assembly for Ventline Vanair Trailer Roof Vent - BVA0502-03

Average Customer Rating:  4.9 out of 5 stars   (98 Customer Reviews)

Replaces a broken plastic dome assembly on your Ventline Vanair roof vent for motor homes and enclosed trailers. The dome assembly seals the vent when it is closed.


Just installed the new vent caps, fit was perfect and installation easy.

The vent caps are holding up to being outside full time with no issues after one year.
Tom - 10/27/2022


James was great to work with over the phone. He knew his stuff and very nice to work with. He assisted me in making sure that the roof vent cover was the correct fit (and it was). It was an easy install and will keep the rain out during our wet Northwest winter.


Exact replacement of the original plastic dome of my Escape 17B travel trailer’s bathroom exhaust fan. The original plastic dome was probably damaged by a hailstorm two winters ago. I saw two huge holes on top of that dome when I had a chance to inspect and wax my trailer this summer. I am so glad that there is an available replacement part from Thank you!


The caps that I received were original replacement caps. Installation was fast with only two screws on each cap. Vents were close to the edge of the roof of my Airstream so I could replace them from the ladder. I was done in less than 30 minutes. The customer service was terrific and I got the caps in two days. With the new caps and gaskets, I am hopeful that our bathroom and shower will be drip-free.

Vent Covers are working great, Gaskets holding up better than original vents.
John C - 10/29/2020


This replacement vent fits perfectly! Best price out there!!


Cover fit the "privacy room" vent of my 1985 UHaul VT travel travel perfectly. Price for item was competitive, delivery charge was very fair, and delivery was super fast!
Another great experience with!


Perfect fit for broken vent hood damaged by tree branches. Easy install with included hardware. Thank You


It's the OEM dome from Dexter. Fit perfect 5 minute job to install.


Exact replacement .. two screws out and in .....the new vent cap was on and off camping in the Great Yukon Wilderness with no leaks.


Installed today and everything looks gr eat!


After one year the roof vent dome shows no signs of deteriorating and was perfect fit.


This is the perfect replacement for the vent cover that blew off.


Had a bit of a rough time locating a replacement for our 2010 Airstream vent. My wife discovered it on etrailer and voila . . . perfect fit. Great service also.

The vent is performing just fine. No problems.
Fun I - 12/11/2017


We have this fan on our work van. It was nocked off at the carwash. We ordered this new cover and received it a few days later. Easy and fast.


I was having a hard time finding this item in Canada and when I did find a vendor, they wanted [much more] I found what I needed at etrailer and for [much less] including shipping! And I received it in 9 days! Great service at a great price! Just wondering when you might be opening a Canadian Division because you would clean-up on any other online RV vendors here in Canada! Thank you!


This was exactly what I needed. This fit my 1985 HiLo camper. Great packaging and shipped quickly.


The first one came damaged, I called and this one was sent right out. The building the camper is in is not heated. It will be installed in warmer wither.


Arrived quickly and in good condition. Installed easily. So far I really like the extra couple inches of length over the old factory mirrors.

After a year it is still working perfectly. Keeps its setting even on very rough roads. Couldn’t be happier.
Steve - 09/24/2020


This replacement part was perfect for our Airstream, matched the original and took about 5 minutes to install. Also this is the second time I have ordered from etrailer and they were great to deal with. First order had issues because of a manufacturing defect on a 2" receiver hitch, but they took care of the problem and send a replacement very fast....great company to deal with.


Excellent product. Quick delivery. Strong package. Very pleased with etrailer for rv parts.

Working great, NO leaks! Live in FL, very strong sun. Probably need to replace every few years, but reasonable cost and easy install. Glad I found the product.
John L - 03/12/2019


This cover fit perfectly! I used it to replace an old broken one on my 1979 Dodge/Higgins Delta. I wish it was available in white (original color), but the color matched my trim nicely. I replaced both top covers to match & it was just a matter of time before the other cracked. Now that my RV is in a garage, it should outlast me. Thanx for the great service!


This was quick and easy to install on top of my 1978 Airstream Ambassador, and it works great! For aesthetic purposes, I tried hard to find a chrome one, to no avail, so I 'settled' for black. However, I can hardly see it from the ground, AND it matches some black parts on my TV antenna-so it doesn't look out of place at all!

Also, every other website I looked at wanted to sell me the whole fan assembly for a minimum of $65. etrailer was the only site I could find that sells individual parts. Thank you, etrailer, I'll be back!


This is a cap to shut the wind and weather out of the bathroom fan. My old one had lost all the rubber gasket material. This new one went on with two screws and saels off the fan area just great. Replaced it in about 5 minutes.


Exactly what I was looking for at the right price. A crack in the original vent cover was the source of a leak. Step 1) duct tape. Step 2) Find a replacement. It was trickier than you would think. The price on etrailer was less than half of what it was Am***n. It pays to shop around and the shopping experience is personalized with real people following up on your purchase.


We have a colorado family vacation planned for the end of this month And my trailer went through a hail storm and had some vents hmmbroken out I really didn't think I had time to order parts and make needed repairs but etrailer got me the needed parts in no time and repairs were made with time to spare. Great job. Gil in tx.

Show More Reviews

See what our Experts say about this Ventline RV Vents and Fans

Do you have a question about this RV Vents and Fan?

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate rv vents and fan information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Raymond P
Written by:
Raymond P
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Jeffrey L
Expert Research:
Jeffrey L
Employee Cole B
Installed by:
Cole B
Employee Manda E
Updated by:
Manda E

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.