I have a brake rotor and the number on the box is 016-9412-0, any idea what vehicle itis for?

If there is a pulsing vibration in the brake pedal and the steering wheel that changes along with vehicle speed, I would think you have warped front brake rotors. If they are within specification, you can have them turned back smooth. If they are under specification, you will need to have them replaced. It is always a good idea to change pads along with the rotors.

fixya has no idea what your question is about --need what vehicle and more of a description of what box or plug either resubmit or put in additional comments

check you rotors possible slight warp

Loose tie rods that is what my problem was when my car did that. What happens is when you apply the brakes the tie rods move in and out

Please be more specific here -by rotor what are you refering too ,is this vehicle a rear drum brake or a drum brake inside a brake disk ,Sorry here but this is a international website and some of us use the queens english.Abeit it with a cockney accent loike geezer noiw waat i meeeen

Replacing the rotors is usually a good idea if you experience shimmying when braking. It is recommend that you replace both the rotor and the brake pads at the same time. The reference for this information is from this site:

https://practicalmechanic.com/2017/10/25/how-to-change-brake-rotors-on-a-toyota-corolla/

1. Jack up the vehicle and put some jack stands under it.
2. Remove the Lug nuts and the tire.
3. Carefully remove the caliper and caliper bracket.
4. Remove the old rotor. And replace it with the new rotor.
5. Reassemble the caliper bracket
6. Put on the new brakes pads and reassemble the caliper.
7. Put the tire and lug nuts back on.
8. Be sure to use the proper torque specifications.
9. Remove the jack stands and lower the vehicle.
10. Read torque the lug nuts to the proper specification.
11. Follow the link for details and photos.

https://practicalmechanic.com/2017/10/25/how-to-change-brake-rotors-on-a-toyota-corolla/

Are your front brake rotors badly worn/scored? This will cause the pads to flex, giving you a spongy brake pedal feel. Change the rotors if they are heavily scored and ribbed. Hope this helps...

Could be a number of problems. Here are a few.

Defective Brake Pads

Brake pads that are defective and/or incorrectly installed can, over time, cause brake rotors to warp and become damaged. Brake pads are responsible for squeezing against the spinning brake rotor, an action that causes a vehicle to slow down or stop. If the brake pads are bent, misshapen in any way, or aligned and/or installed abnormally, they can exert abnormal pressure on the brake rotors, a condition that can cause brake rotor warpage over time.

Abnormal Brake Caliper Action

An abnormal or malfunctioning brake caliper can result in brake rotor warpage if the degree of brake caliper dysfunction is severe enough. A brake caliper houses a set of vehicle brake pads and provides the squeezing force necessary to squeeze the brake pads against the spinning brake rotor. If a brake caliper applies too much pressure to the brake pads, or if it applies pressure inconsistently, it can cause a brake rotor to warp over time. Adequate brake caliper action is necessary for optimizing brake pad and brake rotor function.

Excessive Heat

A vehicle's braking system generates a tremendous amount of friction-related heat, heat that normally gets radiated away from the brake pads and brake rotor mechanisms. However, in cases where excessive heat is generated within a braking system and not dispersed adequately, serious brake malfunctions can occur, which can include brake rotor warpage. A stuck brake caliper, old, worn-down brake pads, or a defective brake rotor can cause excessive heat to develop in or around a brake rotor, which can cause brake rotor damage and warpage.

Damanged Wheel Hub Spindle

A brake rotor assembly is supported by and rides on a long, slender metal tube called a hub, or wheel hub assembly. The hub is what allows for the smooth, even circular motion of the spinning brake rotor. Designed with a smooth, low-friction exterior, the wheel hub assembly is critical to the proper spinning motion of the brake rotor. Any abnormalities or defects with the wheel hub assembly, including hub warpage, cracking or misalignment, can cause abnormal brake rotor rotation, which in turn can cause brake rotor warpage over time. Normally, a damaged wheel hub assembly is noticed and remedied prior to extensive brake rotor damage, as a severely damaged wheel hub assembly will cause a vehicle tire to wobble and shake.

1999 Taurus/Sable Section 06-03: Brakes, Front Disc 1999 Taurus/Sable Workshop Manual REMOVAL AND INSTALLATION Procedure revision date: 06/25/1998 Disc Removal

1. Raise vehicle on hoist.
   

1. Remove wheel and tire assembly. Be careful to avoid damage or interference with caliper bleeder screw fitting and front disc brake rotor shield (2K004).
   

1. CAUTION: Handle front disc brake rotor (1125) and disc brake caliper (2B120) assembly in such a way as to prevent deformation of front disc brake rotor , and nicking, scratching or contamination of brake linings/rotor surfaces.
   NOTE: To prevent damage, do not allow disc brake caliper to hang by the front brake hose (2078) .
   
   
   Remove caliper anchor plate bolts and discard. Position disc brake caliper out of the way. Prevent separation of caliper housing from anchor bracket because contamination of guide pin journals can occur.
   

1. NOTE: If excessive force must be used during front disc brake rotor removal, the front disc brake rotor should be checked for runout prior to installation.
   
   
   If additional force is required to remove front disc brake rotor , apply Rust Penetrant and Inhibitor F2AZ-19A501-A or equivalent meeting Ford specification ESR-M99C56-A on front and rear rotor/hub mating surfaces. First, strike front disc brake rotor between lug bolts (1107) with a plastic hammer. If this does not work, attach 2-3 Jaw Puller 205-D027 (D80L-1013-A) or equivalent and remove front disc brake rotor . Remove front disc brake rotor from wheel hub (1104) assembly by pulling it off the lug bolts.
   

Installation

1. If original front disc brake rotor is being installed, make sure rotor braking and mounting surfaces are clean.
   

1. CAUTION: Failure to clean rust and foreign material from rotor and hub mounting faces when installing new or old front disc brake rotors will result in high rotor runout, which will speed up the development of brake roughness shudder vibration.
   Apply a small amount of Silicone Brake Caliper Grease and Dielectric Compound D7AZ-19A331-A or equivalent meeting Ford specification ESE-M1C171-A to pilot diameter of front disc brake rotor.
   

1. Install front disc brake rotor on wheel hub assembly.
   

1. Install disc brake caliper and new caliper anchor bracket bolts on front disc brake rotor . Tighten caliper anchor bracket bolts to 88-118 Nm (65-87 lb-ft).
   

1. CAUTION: Failure to tighten lug nuts (1012) in a star pattern may result in high rotor runout, which will speed up the development of brake roughness, shudder and vibration.
   Install wheel and tire assembly on vehicle. Tighten lug nuts to 115-142 Nm (85-104 lb-ft) using Rotunda Accutorq® Lug Nut Socket 164-R0303 or equivalent on a 1/2 inch air impact wrench, or use a torque wrench.
   

1. Lower vehicle.
   

1. Pump brake pedal prior to moving vehicle to position brake linings.
   

1. Road test vehicle.
   

New revised calipers. and have the new rotors machined right out of the box before installing