Remote fob only works up against the window

[DieselHonda]

To open or lock the 2007 saloon, I need to have the fob up close to the front windows, it will not work if I am at the booth. Tried both keys, checked the batteries and replaced them anyway. About two or three times a year, the alarm will go off outside my house, off road parking. 

[Trevor]

Is the vehicle battery also in good condition?

Sounds silly but try holding the fob to your head and testing the range.....strangely enough it boosts the signal