SYMPTOM CONDITION CAUSE SOLUTIONShudder, rattle Worn suspension or wheel bearing components Worn components Repair or replaceShudder Disc run-out Warped discs Machine or replace discsBurning smell Overheating new brake pads Normal while bedding in pads, after heavy braking Take it easySmoke from caliper or wheel arches Smoke After extreme braking caused by chemicals or paint on the backing plate burning Take it easyVehicle pulling to one side when braking Pulling to one side Grease or fluid on pads, pads glazed, hoses blocked, discs not same thickness, worn suspension Replace pads, repair leak, replace hoses, replace discs, repairsuspensionPads not lasting Durability Broken or damaged hardware kit, driver abuse, discs worn below minimum specification Replace hardware kit, replace discs, take it easyDead non-progressive feel to pedal Dead pedal Severely glazed pads, calipers seized, blockage in hydraulic system Replace pads, repair calipers, unplug blockageExcessive travel on pedal Spongy pedal Leak in hydraulics, boiling brake fluid Repair hydraulics, replace brake fluid

High Performance Brake Discs and Brake Pads byBosch Troubleshooting

Technical Hotline:

0867 377 800rbsahotline@za.bosch.com

Your online Automotive Aftermarket Product Catalogue:

www.bosch-automotive-catalog.com

SYMPTOM: Insufficient braking, squealCONDITION: DelaminationCAUSE: Disc below minimum specification,

driver abuse, poor adhesive, wrongpart number or incorrect fitment

SOLUTION: Replace pads

SYMPTOM: Squeal, grindingCONDITION: Glazed padsCAUSE: Disc below minimum specification,

driver abuseSOLUTION: Replace pads and discs if necessary,

remove glazed surface, take it easy

SYMPTOM: Insufficient brakingCONDITION: Green fadeCAUSE: Pads not bed inSOLUTION: Bed pads in

SYMPTOM: GrindingCONDITION: Worn padsCAUSE: Pads not inspected regularlySOLUTION: Replace pads and replace or

machine discs

SYMPTOM: Insufficient brakingCONDITION: Brake fluid contaminationCAUSE: Leaking caliper or brake hoseSOLUTION: Replace brake pads and repair leak

SYMPTOM: Squeal, grindingCONDITION: OverheatingCAUSE: Disc below minimum specification,

driver abuseSOLUTION: Replace pads and discs, take it easy

SYMPTOM: Squeal, grindingCONDITION: Foreign object in friction materialCAUSE: Object entering between disc and

brake pads, dustSOLUTION: Remove object or replace pads

SYMPTOM: NoneCONDITION: Uneven wearCAUSE: Caliper bolts or hardware seizedSOLUTION: Repair or replace

SYMPTOM: NoneCONDITION: Angled wearCAUSE: Caliper bolts or hardware seizedSOLUTION: Repair or replace

SYMPTOM: GrindingCONDITION: Fitted back to frontCAUSE: Pads not fitted correctlySOLUTION: Replace pads and fit correctly

SYMPTOM: Pads not fittingCONDITION: Bent backing plateCAUSE: Pads not fitted correctly, wrong

part numberSOLUTION: Replace pads and fit correctly

SYMPTOM: Overheating pads, reduced pad life,brake fade

CONDITION: Worn discsCAUSE: Discs not replaced regularly, normal

wearSOLUTION: Replace discs

SYMPTOM: Squeal, grindingCONDITION: Groove on discsCAUSE: Foreign object embedded in padsSOLUTION: Replace pads, machine or replace

discs

SYMPTOM: Vibration, noise, squealCONDITION: Rust on discsCAUSE: Mostly occurs when vehicle stands

for a long period of timeSOLUTION: Machine discs if there are no deep

pit marks or replace discs

SYMPTOM: SquealCONDITION: Ridge on discsCAUSE: Discs not

replacedregularly, normalwear

SOLUTION: Machine orreplacediscs

SYMPTOM: Vibration, noise

CONDITION: Cracked discsCAUSE: High operating

temperature,discs wornbelow minimumspecification

SOLUTION: Replacediscs

SYMPTOM: Vibration, shudderCONDITION: Spots on discsCAUSE: Low friction material

on pads, driverabuse

SOLUTION: Replace pads,machine orreplacediscs,take iteasy

1 Always make sure the braking surfaces are clean of grease or brake fluid2 Replace discs in pairs and pads in sets3 Make sure of fitting the correct part number to the correct vehicle4 Always tighten wheelnuts to the correct torque (do not use an impact wrench)

5 Replace brake fluid every 12 months6 The recommended products apply within normal operating conditions for series production

models, but not for racing, special or high performance versions unless these are specifically listed. Incorrect installation, abuse or modification of the product will void the warranty.

GENERAL NOTES