Dear Sir,
I am a recent customer of your rental company having I rented a car from your downtown outlet in Detroit. The car hired was an economy model vehicle which I rented from March 21st to the present. I would like to commend your company on their professionalism and the service offered, and as such I am sure you will handle my incident with these qualities.
Unfortunately, I had an unavoidable accident involving the aforementioned vehicle and another party. The accident was caused by the other car failing to stop at the red light of the intersection I was passing through, and as such the second party collided into the driver's side of my automobile. The police were informed in Situ, whereupon they recorded information regarding the accident and the other driver’s insurance details.
The police established the other driver's responsibility for the accident, and the second party's insurance company has been informed. I would like to request that a replacement vehicle be offered while my current vehicle is incapacitated. Once again, I would like to commend your company's professional attitude.
Sorry to have caused these problems,
Yours Sincerely,
J. William. 
Dear Sir,
I am a recent customer of your rental  
company
 having I rented a car from your downtown outlet in Detroit. The car hired was an economy model  
vehicle
 which I rented from March 21st to the present. I would like to commend your  
company
 on their professionalism and the service offered, and as such I am sure you will handle my incident with these qualities.
Unfortunately, I had an unavoidable  
accident
 involving the aforementioned  
vehicle
 and another party. The  
accident
  was caused
 by the other car failing to  
stop
 at the red light of the intersection I was passing through, and as such the second party collided into the driver's side of my automobile. The police  
were informed
 in  
Situ
, whereupon they recorded information regarding the  
accident
 and the other driver’s insurance  
details
. 
The
 police established the other driver's responsibility for the  
accident
, and the second party's insurance  
company
 has  
been informed
. I would like to request that a replacement  
vehicle
  be offered
 while my  
current
  vehicle
  is incapacitated
. Once again, I would like to commend your  
company
's professional attitude.
Sorry to have caused these problems,
Yours  
Sincerely
,
J. William.