Respected Sir/Madam,
With all due respect, my name is ___________ (name) and I do hold a ____________ (type of bank account) account having account number __________ (loan account number).
I write this email to bring to your attention that on __/___/_______(date) I obtained a ____________(vehicle/car/bike/housing/other) loan having __________ (loan account number) for the amount of _____________(amount) on _____ (interest rate). I have always made all the loan payments on time. As per discussion, currently, my loan rate of interest in ___ (present loan rate of interest) and I would like to inform you that I am eligible for reduced loan interest rate ___ (new loan rate of interest).
Therefore, I request you to reduce interest rate on the on going loan due to ____________ (mention reason). I hope that you will consider my request and do the needful. If you need to discuss this matter, you can contact me at ___________ (contact details).
Thank you for your valuable time and support. I shall be highly obliged.
Regards,
___________ (Your name),
___________ (Contact details)