Brake is available for 172 car brands
MINI 
SEAT 
LAND ROVER 
SUZUKI 
MITSUBISHI 
JAGUAR 
ALFA ROMEO 
OPEL 
PORSCHE 
JEEP 
SUBARU 
CHEVROLET 
LEXUS 
DACIA 
SAAB 
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SSANGYONG 
MG 
ISUZU 
IVECO 
ABARTH 
ROVER 
INFINITI 
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ASTON MARTIN 
TESLA 
MASERATI 
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DS 
LDV 
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AUSTIN 
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TVR 
AIXAM 
LADA 
MORRIS 
MORGAN 
CHERY 
MCLAREN 
PIAGGIO 
MAN 
HAVAL 
HUMMER 
MAHINDRA 
ALPINE 
BUGATTI 
GMC 
MICROCAR 
TATA (TELCO) 
AUSTIN-HEALEY 
DAIMLER 
CATERHAM 
GEELY (GLEAGLE) 
CUPRA 
ACURA 
PONTIAC 
LINCOLN 
LEVC 
ASIA MOTORS 
ZASTAVA 
TRABANT 
WESTFIELD 
GENESIS 
DAF 
SANTANA 
AC 
RENAULT TRUCKS 
PANTHER 
UAZ 
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AUTO UNION 
AUTOBIANCHI 
NSU 
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BUICK 
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ARO 
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INNOCENTI 
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GAZ 
MERCURY 
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FSO 
HOLDEN 
GLAS 
CARBODIES 
DE TOMASO 
LIGIER 
UMM 
MAYBACH 
SCION 
KTM 
THINK 
BESTURN (FAW) 
ALVIS 
GOUPIL 
POLESTAR 
BARKAS 
EBRO 
STEYR 
ZUENDAPP 
FORD OTOSAN 
MEGA 
PLYMOUTH 
OLDSMOBILE 
BERTONE 
SATURN 
INDIGO 
MINELLI 
SHELBY 
WIESMANN 
PUCH 
ASKAM (FARGO/DESOTO) 
JIANGLING LANDWIND 
SPYKER 
AUVERLAND 
FORD ASIA / OCEANIA 
JINBEI 
CASALINI 
PININFARINA 
BUICK (SGM) 
SHUANGHUAN AUTO 
ARTEGA 
MIA ELECTRIC 
STREETSCOOTER 
RUF 
KOENIGSEGG 
LLOYD 
VICTORY 
LYNK & CO 
GERMAN E-CARS 
RAVON 
POLARIS Brakes manufacturers:
STARK
BOSCH
SACHS
SKF
VALEO
VAN WEZEL
LuK
MAPCO
A.B.S.
HELLA
ATE
MONROE
TRW
TYC
- Brake Disc Type: solid
- Fitting Position: Rear Axle
- Diameter [mm]: 230
- Centering Diameter [mm]: 65,0
- Hole Arrangement/Number: 05/06
- Bolt Hole Circle Ø [mm]: 100
- Brake Disc Thickness [mm]: 9
- Minimum thickness [mm]: 7
- Inner Diameter [mm]: 125
- Height [mm]: 39,5
- Bore Ø [mm]: 16
- usable for vehicles to model year: 2016/11
- Drilled: no
- Condition: New
- Brake Disc Type: internally vented
- Diameter [mm]: 266
- Centering Diameter [mm]: 66
- Hole Arrangement/Number: 4/6
- Wheel Bolt Bore Ø [mm]: 13, 108
- Brake Disc Thickness [mm]: 22
- Surface: Uncoated
- Minimum thickness [mm]: 20
- Inner Diameter [mm]: 133
- Height [mm]: 34
- Tightening Torque [Nm]: 90
- Supplementary Article / Supplementary Info Info 2: without bolts/screws
- usable for vehicles to model year: 2016/11
- Drilled: no
- Condition: New
- Brake Disc Type: internally vented
- Diameter [mm]: 256
- Centering Diameter [mm]: 65,0
- Number of Holes: 5
- Bolt Hole Circle Ø [mm]: 100,0
- Brake Disc Thickness [mm]: 22,0
- Surface: Uncoated
- Minimum thickness [mm]: 19,0
- Inner Diameter [mm]: 134
- Height [mm]: 36,7
- Bore Ø [mm]: 15,6
- Supplementary Article / Supplementary Info Info 2: without bolts/screws
- usable for vehicles to model year: 2016/11
- Drilled: no
- Condition: New
- Wear Warning Contact: excl. wear warning contact
- Height [mm]: 53
- Width [mm]: 87
- Thickness [mm]: 17
- WVA Number: 23554, 20961
- Supplementary Article / Supplementary Info Info 2: with brake caliper screws
- Supplementary Article / Supplementary Info: with accessories
- Brake System: Lucas
- Quantity Unit: Axle Set
- Condition: New
Braking system: operating principle, malfunctions, repair and replacement
The braking system is intended to stop or decelerate the car when it is moving. It is also used for holding the vehicle stationary, even on a hilly road.
Main types
By intended purpose:
- Primary (service). It is used to decrease the speed of the vehicle or stop it completely. In hydraulic braking systems, which are installed on all passenger cars, the brake fluid transfers force from the pedal to the brake pads or shoes; in pneumatic ones, which are common for trucks, this function is performed by compressed air.
- Secondary (backup). Usually, it’s a part of the primary braking system, but can be a separate system as well. It is used when the service brakes fail.
- Parking (emergency). It is used to hold the car stationary for a long time. It prevents the vehicle from moving spontaneously when it is parked on a slope and from rolling back when you hill start. Usually, it has a mechanical actuator, in which brake pads are operated by a metal cable. However, there are also electromechanically actuated systems, where an electric motor mounted directly on the brake caliper provides brake pads pressing against the disc.
By the type of brake mechanism:
- With discs. This system is the most efficient. It ensures a short braking distance and is resistant to overheating. However, it is prone to getting dirty.
- With drums. It is less efficient than the disc system but is well protected from dirt, and so can be fitted on the rear axle of some SUVs. The brake shoes wear out slower.
Main components and operation specifics of the braking system
The key elements of a hydraulic braking system are a pedal box, vacuum booster, master and wheel cylinders or brake calipers, discs or drums, as well as brake pads or shoes, hoses and pipes. When the pedal is pressed, the piston of the master cylinder moves and the brake fluid is compressed to drive the pistons of the brake calipers or wheel cylinders. The pistons, being in contact with the brake pads or shoes, press them against the disc or drum.
In parking brakes, a system of levers and cables is usually used to transfer force to the pads (shoes).
Most common malfunctions
- Loss of tightness of the system, caused by hardened seals of the cylinders (calipers) or pistons, or cracked fittings and hoses as a result of a collision.
- Brake caliper guide pins get stuck due to failure to lubricate the parts in good time, torn boots, or unsuitable grease.
- Brake discs can warp because of being overheated.
- Premature or uneven wear of brake pads (shoes) caused by an aggressive driving style, low-quality spare parts, or errors during installation.
Proven ways to extend the service life of the system
To ensure a long and efficient service life of your braking system, you should lubricate caliper guide pins and replace the working fluid in due time, and avoid aggressive driving habits. After the new discs and pads are installed, they have to be properly bedded-in.
What you should know about repairing braking systems
Braking system repairs usually involve installation of new parts instead of faulty ones. For example, leaking hoses, pipes, fittings and connectors, pistons, hardened seals, worn-out pads, damaged or worn-out discs have to be replaced. It is possible to restore the master cylinder with the help of the repair kit, which contains o-rings, seals and washers, pistons and springs. There are also brake caliper repair kits.
Motor-doctor.co.uk: only high-quality car parts
At our online shop, you can choose and buy braking system components for your vehicle without any hassle. We provide a warranty for all components, and many of them are available at a promotional price.
Greatly reduced prices on many brand-name spares
Free delivery for orders over £ 250
Your order will be dispatched as soon as possible after receipt of payment
