Sentra Sedan L4-1597cc 1.6L SOHC (E16S) (1986)
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These pads use a semi-metallic compound, similar to the material used in Nissan OE pads prior to the introduction of the NAO compound.
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Key Value semi-metallic pads offer excellent braking performance but do not offer the same level of noise resistance as the OE-NAO pads.
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Service customers have varying sensitivity to brake noise and the individual customer must decide which product best suits his or her
requirements, balancing price and noise resistance.
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Make sure the Service Advisor adequately explains the differences between Key Value brake pads and Nissan OE-NAO brake pads to the
customer when discussing brake service.
Loud continuous squeak/squeal noise:
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Occurs with or without braking.
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This is a normal brake function. It occurs when the brake pad wear indicators contact the rotor.
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It indicates the brake pads are worn out and need to be replaced. Install new brake pads using the information listed under Brake Service
shown in this bulletin and the appropriate Service Manual procedures.
Groan noise when slightly releasing the brakes after coming to a stop:
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This is sometimes called "creep groan".
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It is a normal condition. No repair or service is necessary.
Groan noise during stopping:
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Usually caused by glazing of the rotor's surface as a result of heavy or frequent braking.
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Refer to technical bulletins specific to the model of vehicle regarding this incident.
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Replace the brake pads, then resurface the rotors and finish them with sand paper. Refer to Brake Service shown in this bulletin for additional
detail.
Single clunk noise from front suspension when applying the brakes:
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The noise is a result of the brake pads shifting in the direction of rotor rotation when the brakes are applied.
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Can be duplicated by lightly touching the brake pedal.
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If the brake pedal is pushed hard, the noise is less likely to occur.
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Make sure the brake pads and pad hardware (shims, springs, clips, etc) are installed correctly.
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Refer to ASIST for vehicle specific brake service information.
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Refer to Brake Service shown in this bulletin for additional detail.
Multiple clunk noise and/or pedal pulsation that occurs only one time after the engine is started:
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This is a normal ABS Self Check noise. No service action is necessary.
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The vehicle's ABS system performs a self check. On some models this self check occurs with the first application of the brakes after the engine
is started. On other models the self check occurs the first time the vehicle reaches 5 mph after the engine is started.
Rear Brake Squeal:
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Usually due to an accumulation of brake dust and dirt between the pads/shoes and rotors or drums.
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Clean all dust and dirt from the brake shoes, backing plates and related components.
WARNING:
Brake dust may be hazardous if inhaled. Refer to the Service Manual (ESM) for brake dust precautions and use approved brake cleaning
equipment.
