Nice looking truck. Try troubleshooting by isolating the lights and reflection cards in the scene, delete one and test render without it and see if it goes away, if not try the next. My guess would be that it's a diffuse reflection coming off one of those poly planes, I've had similar problems with light cards.
Also before deleting things, try turning off visible in refractions in the render stats for those planes the angle's strange so it might be that difficult to say what's what most of the time.
A couple things. Is there a reason for "trace reflection" to be unchecked?. It could be the HDRI image, there's a really bright spot near the roof area and the previous camera angle was making your door panel window really catch it. Which goes back to my original question. Do you have an exposure lens on that camera?
@Mis nova. Yes I tried all the option that you mention. Even I delete the glass and I made new one, "trace reflection" checked/ unchecked, Delete the light, delete the white plane. so many things, but didn't help.
"trace reflection" to be unchecked? was just to test if there is problem with this option. but seem checked/unchecked didn't help.
Yes I do have maya materials lens attached to the camera, you think bcoz of that. here is the screenshot
Yeah this is just weird, if you tried Nilla's advice about testing the lights one by one (and the even hiding the hdri) then I am puzzled. Maybe try a different camera and a fresh exposure node with default settings.
I did find what cause this specular reflection, After deleting, HDRI, lights one by one and turn off/on the emit specular , I notice that there is one light (rightside) cause this issue, when the emit specular is unchecked its goes away, when the emit specular is on its appears again.
I unchecked the emit specular its goes away but in other side I lose some specular overall on the truck little bit, well its not big deal, but i'm sure there is a why to fix that otherwise I have to accept it .