BMW is demanding the full payment of a BMW M4 Competition financed by a British YouTuber after he extensively modified the sports coupe.

Rickardo Senior from YouTube channel ‘LivingLifeFast’ picked up the keys to his M4 last December on a financing deal with a £3,000 (equal to around $3,800 at the current exchange rates) down payment and monthly installments of just over £600 (~$770). He seems to have been so flabbergasted by the affordability of the vehicle that he failed to read the fine print in the contract he signed.

As Senior describes in the video below, BMW recently sent him a letter claiming that he has breached his contract, giving him a week to pay for the car or risk having the vehicle repossessed.

Since taken delivery of the car, the YouTuber added a hybrid turbocharger, methanol injection, an upgraded exhaust, and other modifications to the powertrain. It now pumps out 720 hp.

Also Read: Meet The Rarest BMW M4 Of All; Spain’s New M4 Competition Sport [60 Pics]

As reported by Driving, BMW is pursuing Senior asserting that he “altered the vehicle without [its] consent” and also has doubts that he can make the agreed payments for his M4 through his Personal Contract Purchase plan.

“Based on these two breaches, BMW are demanding the full amount for this car by next week. If I don’t make the payment for this car by next week, they’re threatening to recover the vehicle and probably auction the car off and bill me for the remainder of what’s left of the debt,” Senior says.

The YouTuber admits that he is a “little bit salty” because of what’s happening and says that this incident highlights how important it is to read any contracts or agreements you sign with car manufacturers.