Will applying oil to brake discs be detected?
3 Answers
Applying oil to brake discs will be detected. There are three types of braking systems: Foot brake: The most commonly used brake while driving is operated by the foot, hence also known as the foot brake. When the driver presses the brake pedal, the braking force is transmitted mechanically or hydraulically to the wheel's braking device to generate friction; Parking brake: Also known as the handbrake, it is a braking device used to prevent the vehicle from sliding when parked. There are generally two types: one installed in the middle of the driveshaft and another that directly controls the rear wheel braking; Anti-lock braking system (ABS): When driving on slippery or icy low-friction roads, excessive braking can occur, causing the wheels to lock up and lose traction, leading to a loss of vehicle control. To enable effective control of the vehicle's direction on such hazardous roads, the ABS "Anti-lock Braking System" was developed.
I've worked in the automotive repair industry for many years and handled numerous cases of oil being applied to brake discs. This kind of sabotage is easily detectable because once oil is applied, the driver can immediately feel a drastic drop in braking performance—such as the brake pedal becoming spongy or the vehicle failing to stop properly, with noticeably increased stopping distances. During repairs, when we remove the wheels for inspection, the oil forms a thin film on the brake disc surface. Shining a light or simply wiping it reveals greasy traces. If the oil application is minimal, abnormal squeaking or burning smells may accompany braking. The oil can spread and contaminate the brake pads, accelerating wear. Mechanics can quickly identify the root cause upon inspection, sometimes even tracing the source of the oil stains, such as improper maintenance or intentional acts. Therefore, don't take chances—it's not only dangerous but also easily detected. I recommend car owners regularly inspect their brake systems to prevent such hazards. Safety comes first. If any abnormality is noticed, stop driving immediately and seek repairs—never risk driving in such conditions.
As an ordinary car owner, I discovered this issue during an accident last year. At that time, while driving on the highway, I felt the brakes were weak when pressed, almost losing control, and had to rush to the repair shop. The mechanic checked and said there was oil contamination on the brake discs, likely caused by someone playing a prank while parking or improper car washing. I noticed it while driving because the braking effect was significantly reduced, and the car didn't stop as steadily as usual. The mechanic could confirm the oil stain with a simple observation and wipe, but cleaning it was troublesome, and parts might even need replacement. I think this is utterly foolish—the oil film causes the friction surface to fail, making it extremely easy to detect. Don't do such stupid things. I suggest always locking the car, paying attention to the brake condition, and addressing any abnormalities promptly to prevent accidents. I remember the repair cost me over a thousand dollars that time—a profound lesson.
