A UK YouTuber found out the hard way that you should always read the small print on a contract when financing a new car. Last December, Rickardo Senior from YouTube channel LivingLifeFast bought a brand new M4 on a financing deal with a £3,000 ($3,800) down payment and monthly installments of just over £600 ($770).

After taking delivery of the car, the YouTuber had the M4 extensively modified by adding a hybrid turbocharger, methanol injection, an upgraded exhaust, and other modifications to the powertrain. As a result, the M4 now produces an impressive 720 hp, up from 444 hp in the standard car.

While the modifications made to the M4 are undeniably impressive, BMW wasn't happy after seeing Senior brag about it on YouTube. Since he technically doesn't own the M4, any modifications made to the car are in breach of the contract. In a video, a mortified Senior explains how BMW recently sent him a letter canceling his financing agreement and ordering him to pay for the car in full within a week or risk having the M4 repossessed.

Senior says BMW claims he "altered the vehicle without [its] consent." The automaker 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," he said.

"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." The YouTuber admits he feels a "little bit salty" about BMW's actions and warns people to always read the contract and agreement carefully.