The Key to Stable, Coordinated Rear Braking
Your Tesla Model S (2012-2021) or Model X (2015-2021) is engineered for both power and safety—and its rear braking system is just as critical as the front. The 1007889-00-B right-hand rear brake caliper is the workhorse of your rear-right brake, converting hydraulic pressure into reliable stopping force that balances the front brakes. For these heavier Tesla models (up to 5,800 lbs for Model X), a functional rear-right caliper isn’t just about stopping—it’s about preventing skidding, uneven tire wear, and “nose-diving” during hard stops.
A failing rear-right caliper can throw off your entire brake system: your Model S/X may pull left when stopping, the right-rear rotor could overheat, or you might notice reduced braking confidence. This caliper restores rear braking symmetry, ensuring every stop feels smooth, controlled, and true to Tesla’s high-performance standards.
- Delivers Rear-End Stopping Force: When you press the brake pedal, brake fluid surges into the caliper, pushing its internal pistons outward. These pistons squeeze your rear brake pads (sold separately) against the right-rear rotor, creating friction that slows the wheel—working in tandem with the front calipers to keep the vehicle stable.
- Stops Brake Fade: Built with a vented aluminum housing that dissipates heat from friction. This is crucial for long drives or stop-and-go traffic: no more “soft” brakes from overheating (a dangerous issue called “brake fade”).
- Protects Rotors & Tires: Precision-machined pistons apply even pressure to the pads, so your right-rear rotor wears evenly (no warping or grooves) and your rear tires stay aligned—saving you money on premature replacements.
- Fights Rust & Debris: Sealed internals and a corrosion-resistant E-coat shield against road salt, rain, and mud. Unlike cheap calipers that rust shut in snowy or coastal climates, this one stays functional year-round.
Don’t ignore these red flags—they signal a safety risk:
- Pulling to the Left When Braking: The rear-right caliper isn’t engaging, so the rear-left brake overworks, yanking the vehicle left.
- Grinding/Squeaking from the Rear: Seized pistons cause pads to drag on the rotor, creating metal-on-metal noise (this damages both the caliper and rotor—fix immediately).
- Uneven Rear Tire Wear: Bald spots on the inner edge of the right-rear tire (a sign of misalignment from a faulty caliper).
- Soft Brake Pedal: A leak in the caliper drains brake fluid, making the pedal feel “spongy” and reducing overall stopping power—this is an emergency.