Every week we take a look back at the RV Doctor Gary Bunzer's answers to your tough questions. He has been providing insight into troubleshooting, repair and preventative RV maintenance since 1968.

I have been given a 5th wheel trailer that has no title. I am in the process of obtaining that, but need to know where I can find the VIN number. An internet search has proved fruitless and those responding often tell me to look on the tongue next to the bumper hitch. Obviously, they don't know what a fifth wheel trailer is. I'd truly appreciate your help. I do enjoy your information coming to my inbox every week- I'm learning loads! thank you in advance. — Tina G.

Tina, for towable recreational vehicles, 5th wheels and conventional travel trailers, the Federal certification label with the manufacturer’s VIN is typically found on the left, roadside front corner of the coach, near the bottom of the sidewall. In some cases, it may also be posted inside a cabinet door or even on the entry screen door. But the required spot is at that front left corner, down low on the sidewall.

If you're asking, "Where is the VIN number on a trailer?" The answer is the same — on the left, roadside front corner of the coach, near the bottom of the sidewall. 

All effort is made to ensure the correctness of Gary’s responses; however, not all responses will apply in every instance. Some situations may mandate a visual inspection and further hands-on testing. It is imperative that if you choose to follow any instructions or procedures outlined in The Doctor’s Orders column, you must first satisfy yourself thoroughly that neither personal nor product safety will be compromised or jeopardized. If you are in doubt or do not feel comfortable about a procedure, do not continue. Simply call your local RV service facility and make an appointment with them. Remember, the advice, recommendations and procedures offered by The RV Doctor are solely those of Gary. They do not necessarily reflect the opinions, procedures and recommendations of Lippert, this publication or any of its advertisers.