{
    "lazyNodes": false,
    "abFitnotesFlag": false,
    "abCrawlReviews": false,
    "productOptionsCookie": false,
    "orderDelayFlag": false,
    "skipSessionCookie": false,
    "covidMessage": false,
    "fullTitleCookie": false,
    "nrLoggerCookie": false,
    "checkoutReviewCookie": false,
    "productOptionSeqCookie": false,
    "maintenanceFlag": false,
    "bufferETACookie": false,
    "multiShippingDiscountFlag": false,
    "newFitmentFlag": false,
    "surveyOptInFlag": false,
    "crossSellFlag": false,
    "skuMappingFlag": false,
    "paySplitCookie": false,
    "callDisableFlag": false,
    "zipPaymentFlag": "u",
    "hassleFreeReturn": false,
    "lifetimeReplacement": false,
    "cpn_off": false
}
Select your vehicle

Fiat Brake Disc and Pad Kits

Refine by:

Shop Catalog

Showing 1 - 15 of 251 results
Display item:
15
30
45
Sort by:
Front Brake Disc and Pad Kit, Plain Surface, 5 Lugs, Ceramic, Cast Iron, Pro-Line Series
Part Number: KIT-072421-160
Vehicle Info Required to Guarantee Fit
$89.99
Product Details
Location : FrontAttention Needed :

Models have multiple versions, check or measure your original product to order the correct SKU.

Notes : Includes Shims and hardwareComponents : (2) Brake Disc and (1) Brake Pad SetSeries : Pro-Line SeriesDisc Design : Plain SurfaceDisc Finish : NaturalPad Material : CeramicRecommended Use : OE ReplacementNumberof Lugs : 5 LugsDisc Material : Cast IronQuantity Sold : 2-Wheel SetWarranty : 3-year or 36,000-mile SureStop limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Arsenic, Chromium (Hexavalent compounds), Nickel and Cobalt, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Replaces OE Number : 68249840AA, 0077367282, 0077367518001, 52094174, 68267915AA, 68273005AA, 68299399AA, 68346917AA, 68346917AB, 68346986AA, 68346986AB, 68379582AA, 68379582AB, 68404783AAReturns Policy : 30-Day Return PolicyInterchange Part Number : 1216308, 68249840AA, TXC1811, 5001811, MGD1811CH, 0077367282, 0077367518001, 52094174, 68267915AA, 68273005AA, 68299399AA, 68346917AA, 68346917AB, 68346986AA, 68346986AB, 68379582AA, 68379582AB, 68404783AA
Front Brake Disc and Pad Kit, Plain Surface, 4 Lugs, Organic, Cast Iron, Pro-Line Series
Part Number: KIT-072421-157
Vehicle Info Required to Guarantee Fit
$69.99
Product Details
Location : FrontAttention Needed :

Models have multiple versions, check or measure your original product to order the correct SKU.

Notes : 1.59 in. Height; 0.87 in. nom. Thickness; 0.8 in. min. Thickness; 2.33 in. Hub Reg; 0.52 in. Bolt Size; Includes Shims and hardwareComponents : (2) Brake Disc and (1) Brake Pad SetSeries : Pro-Line SeriesDisc Design : Plain SurfaceDisc Finish : NaturalDisc Diameter : 10.14 in.Pad Material : OrganicRecommended Use : OE ReplacementNumberof Lugs : 4 LugsDisc Material : Cast IronQuantity Sold : 2-Wheel SetWarranty : 3-year or 36,000-mile SureStop limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Arsenic, Chromium (Hexavalent compounds), Nickel and Cobalt, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Replaces OE Number : 45563, 850288, 60007002, 14HR006, 45563G, 980950R, BR901084, YH324569, 68102483AA, 68102483AB, 68174157AA, 68174157ABReturns Policy : 30-Day Return PolicyInterchange Part Number : 12104002, 45563, 850288, 60007002, 14HR006, 45563G, 980950R, BR901084, YH324569, TXH1568, 5001568, MGD1568C, 68102483AA, 68102483AB, 68174157AA, 68174157AB
Front Brake Disc and Pad Kit, Plain Surface, 4 Lugs, Ceramic, Cast Iron, Pro-Line Series
Part Number: KIT-072421-156
Vehicle Info Required to Guarantee Fit
$61.49
Product Details
Location : FrontAttention Needed :

Models have multiple versions, check or measure your original product to order the correct SKU.

Notes : 1.71 in. Height; 0.87 in. nom. Thickness; 0.8 in. min. Thickness; 2.32 in. Hub Reg; 0.52 in. Bolt Size; Includes Shims and hardwareComponents : (2) Brake Disc and (1) Brake Pad SetSeries : Pro-Line SeriesDisc Design : Plain SurfaceDisc Finish : NaturalDisc Diameter : 11.18 in.Pad Material : CeramicRecommended Use : OE ReplacementNumberof Lugs : 4 LugsDisc Material : Cast IronQuantity Sold : 2-Wheel SetWarranty : 3-year or 36,000-mile SureStop limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Arsenic, Chromium (Hexavalent compounds), Nickel and Cobalt, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Deals : OverstockReplaces OE Number : 4779953AB, 46403088, 46403959, 46445004, 46445892, 46448168, 46758714, 60806135, 60810404, 60812422, 60813038, 82433918, 82440356, 82450657, 82451746, 68190118AAReturns Policy : 30-Day Return PolicyInterchange Part Number : 12104004, 4779953AB, 46403088, 46403959, 46445004, 46445892, 46448168, 46758714, 60806135, 60810404, 60812422, 60813038, 82433918, 82440356, 82450657, 82451746, TXH1618, 50016181, EHT1778H, 68190118AA
Rear Brake Disc and Pad Kit, Plain Surface, 5 Lugs, Ceramic, Cast Iron, Pro-Line Series
Part Number: KIT-072421-246
Vehicle Info Required to Guarantee Fit
$68.99
Product Details
Location : RearAttention Needed :

Models have multiple versions, check or measure your original product to order the correct SKU.

Notes : Includes Shims and hardwareComponents : (2) Brake Disc and (1) Brake Pad SetSeries : Pro-Line SeriesDisc Design : Plain SurfacePad Material : CeramicRecommended Use : OE ReplacementNumberof Lugs : 5 LugsDisc Material : Cast IronQuantity Sold : 2-Wheel SetWarranty : 3-year or 36,000-mile SureStop limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Arsenic, Chromium (Hexavalent compounds), Nickel and Cobalt, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Deals : OverstockReplaces OE Number : 43199, 850418, 12158015, 60042014, 72143DL, 901392G, 981643R, 0077367145, 68263132AA, 68289634AAReturns Policy : 30-Day Return PolicyInterchange Part Number : 12158015, 43199, 850418, 60042014, 72143DL, 901392G, 981643R, TXC1809, 5001809, MGD1809CH, 0077367145, 68263132AA, 68289634AA
Rear Brake Disc and Pad Kit, Plain Surface, 4 Lugs, Organic, Cast Iron, Pro-Line Series
Part Number: KIT-072421-244
Vehicle Info Required to Guarantee Fit
$75.49
Product Details
Location : RearNotes : 1.57 in. Height; 0.43 in. nom. Thickness; 0.36 in. min. Thickness; 2.33 in. Hub Reg; 0.52 in. Bolt Size; Includes Shims and hardwareComponents : (2) Brake Disc and (1) Brake Pad SetSeries : Pro-Line SeriesDisc Design : Plain SurfaceDisc Finish : NaturalDisc Diameter : 9.47 in.Pad Material : OrganicRecommended Use : OE ReplacementNumberof Lugs : 4 LugsDisc Material : Cast IronQuantity Sold : 2-Wheel SetWarranty : 3-year or 36,000-mile SureStop limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Arsenic, Chromium (Hexavalent compounds), Nickel and Cobalt, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Replaces OE Number : 45564, 850289, 60007001, 14HR005, 45564G, 980949R, BR901086, 68088919AA, 68088919AB, 68206120AAReturns Policy : 30-Day Return PolicyInterchange Part Number : 12104001, 45564, 850289, 60007001, 14HR005, 45564G, 980949R, BR901086, TXH1569, 5001569, MGD1569CH, 68088919AA, 68088919AB, 68206120AA
Rear Brake Disc and Pad Kit, Plain Surface, 5 Lugs, Organic, Cast Iron, Pro-Line Series
Part Number: KIT-072421-245
Vehicle Info Required to Guarantee Fit
$42.49
Product Details
Location : RearNotes : Includes Shims and hardwareComponents : (2) Brake Disc and (1) Brake Pad SetSeries : Pro-Line SeriesDisc Design : Plain SurfaceDisc Finish : NaturalPad Material : OrganicRecommended Use : OE ReplacementNumberof Lugs : 5 LugsDisc Material : Cast IronQuantity Sold : 2-Wheel SetWarranty : 3-year or 36,000-mile SureStop limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Arsenic, Chromium (Hexavalent compounds), Nickel and Cobalt, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Deals : OverstockReplaces OE Number : 45636, 850453, 12104003, 60007003, 781769R, 68211493AA, 77366595Returns Policy : 30-Day Return PolicyInterchange Part Number : 12104003, 45636, 850453, 60007003, 781769R, TXH1722, 5001722, 161722, 68211493AA, 77366595
Front and Rear Brake Disc and Pad Kit, Plain Surface, 4 Lugs, Organic, Pro-Line Series
Part Number: KIT-050323-18
Vehicle Info Required to Guarantee Fit
$136.99
Product Details
Location : Front And RearAttention Needed :

Models have multiple versions, check or measure your original product to order the correct SKU.

Components : (4) Brake Disc and (2) Brake Pad SetSeries : Pro-Line SeriesDisc Design : Plain SurfacePad Material : OrganicRecommended Use : OE ReplacementNumberof Lugs : 4 LugsQuantity Sold : 4-Wheel SetWarranty : 3-year or 36,000-mile SureStop limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Arsenic, Chromium (Hexavalent compounds), Nickel and Cobalt, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Replaces OE Number : 45564, 850289, 60007001, 14HR005, 45564G, 980949R, BR901086, 45563, 850288, 60007002, 14HR006, 45563G, 980950R, BR901084, YH324569, 68088919AA, 68088919AB, 68206120AA, 68102483AA, 68102483AB, 68174157AA, 68174157ABReturns Policy : 30-Day Return PolicyInterchange Part Number : 12104001, 45564, 850289, 60007001, 14HR005, 45564G, 980949R, BR901086, 12104002, 45563, 850288, 60007002, 14HR006, 45563G, 980950R, BR901084, YH324569, TXH1569, 5001569, MGD1569CH, 68088919AA, 68088919AB, 68206120AA, TXH1568, 5001568, MGD1568C, 68102483AA, 68102483AB, 68174157AA, 68174157AB
Front and Rear Brake Disc and Pad Kit, Plain Surface, 4-Wheel Set, 5 Lugs, Ceramic - Front; Organic - Rear
Part Number: KIT-030923-23
Vehicle Info Required to Guarantee Fit
$158.99
Product Details
Location : Front And RearAttention Needed :

Models have multiple versions, check or measure your original product to order the correct SKU.

Components : (4) Brake Disc and (2) Brake Pad SetSeries : Pro-Line SeriesDisc Design : Plain SurfacePad Material : CeramicRecommended Use : OE ReplacementNumberof Lugs : 5 LugsDisc Material : Cast IronQuantity Sold : 4-Wheel SetWarranty : 3-year or 36,000-mile SureStop limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Arsenic, Chromium (Hexavalent compounds), Nickel and Cobalt, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Deals : OverstockReplaces OE Number : 43199, 850418, 12158015, 60042014, 72143DL, 901392G, 981643R, 68249840AA, 0077367145, 68263132AA, 68289634AA, 0077367282, 0077367518001, 52094174, 68267915AA, 68273005AA, 68299399AA, 68346917AA, 68346917AB, 68346986AA, 68346986AB, 68379582AA, 68379582AB, 68404783AAReturns Policy : 30-Day Return PolicyInterchange Part Number : 12158015, 43199, 850418, 60042014, 72143DL, 901392G, 981643R, 1216308, 68249840AA, TXC1809, 5001809, MGD1809CH, 0077367145, 68263132AA, 68289634AA, TXC1811, 5001811, MGD1811CH, 0077367282, 0077367518001, 52094174, 68267915AA, 68273005AA, 68299399AA, 68346917AA, 68346917AB, 68346986AA, 68346986AB, 68379582AA, 68379582AB, 68404783AA
Front and Rear Brake Disc and Pad Kit, Plain Surface, 4 Lugs, Ceramic - Front; Organic - Rear, Pro-Line Series
Part Number: KIT-050323-19
Vehicle Info Required to Guarantee Fit
$137.99
Product Details
Location : Front And RearAttention Needed :

Models have multiple versions, check or measure your original product to order the correct SKU.

Components : (4) Brake Disc and (2) Brake Pad SetSeries : Pro-Line SeriesDisc Design : Plain SurfacePad Material : Ceramic - Front, Organic - RearRecommended Use : OE ReplacementNumberof Lugs : 4 LugsQuantity Sold : 4-Wheel SetWarranty : 3-year or 36,000-mile SureStop limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Arsenic, Chromium (Hexavalent compounds), Nickel and Cobalt, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Deals : OverstockReplaces OE Number : 45564, 850289, 60007001, 14HR005, 45564G, 980949R, BR901086, 4779953AB, 46403088, 46403959, 46445004, 46445892, 46448168, 46758714, 60806135, 60810404, 60812422, 60813038, 82433918, 82440356, 82450657, 82451746, 68190118AA, 68088919AA, 68088919AB, 68206120AAReturns Policy : 30-Day Return PolicyInterchange Part Number : 12104001, 45564, 850289, 60007001, 14HR005, 45564G, 980949R, BR901086, 12104004, 4779953AB, 46403088, 46403959, 46445004, 46445892, 46448168, 46758714, 60806135, 60810404, 60812422, 60813038, 82433918, 82440356, 82450657, 82451746, TXH1618, 50016181, EHT1778H, 68190118AA, TXH1569, 5001569, MGD1569CH, 68088919AA, 68088919AB, 68206120AA
KIT-TRW101921-280 Front and Rear Brake Disc and Pad Kit, Plain Surface 4 Lugs - Front; 4 Lugs - Rear Semi-Metallic Premium Friction Series
Part Number: KIT-TRW101921-280
Vehicle Info Required to Guarantee Fit
$173.99
Product Details
Location : Front And RearAttention Needed :

Models have multiple versions, check or measure your original product to order the correct SKU.

Components : (4) Brake Disc and (2) Brake Pad SetSeries : Premium Friction SeriesDisc Design : Plain SurfaceDisc Finish : NaturalDisc Diameter : 10.14 in. - Front; 9.47 in. - RearPad Material : Semi-MetallicRecommended Use : OE ReplacementNumberof Lugs : 4 Lugs - Front; 4 Lugs - RearDisc Material : Cast IronQuantity Sold : 4-Wheel SetWarranty : 12-month TRW limited warranty from installation date or 18-month TRW limited warranty from delivery date, whichever occurs firstProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : European Vehicle PartsReplaces OE Number : 45564, 850289, 60007001, 14HR005, 45564G, 980949R, BR901086, 45563, 850288, 60007002, 14HR006, 45563G, 980950R, BR901084, YH324569, 68088919AA, 68102483AAReturns Policy : 30-Day Return PolicyInterchange Part Number : 12104001, 45564, 850289, 60007001, 14HR005, 45564G, 980949R, BR901086, 12104002, 45563, 850288, 60007002, 14HR006, 45563G, 980950R, BR901084, YH324569, JSTPSSCP1569, 5001569, MGD1569CH, 68088919AA, JSTPSSCP1568, MGD1568C, 68102483AA
KIT-TRW101921-283 Front and Rear Brake Disc and Pad Kit, Plain Surface 4 Lugs - Front; 4 Lugs - Rear Semi-Metallic Premium Friction Series
Part Number: KIT-TRW101921-283
Vehicle Info Required to Guarantee Fit
$184.49
Product Details
Location : Front And RearAttention Needed :

Models have multiple versions, check or measure your original product to order the correct SKU.

Components : (4) Brake Disc and (2) Brake Pad SetSeries : Premium Friction SeriesDisc Design : Plain SurfaceDisc Finish : NaturalDisc Diameter : 11.18 in. - Front; 9.47 in. - RearPad Material : Semi-MetallicRecommended Use : OE ReplacementNumberof Lugs : 4 Lugs - Front; 4 Lugs - RearDisc Material : Cast IronQuantity Sold : 4-Wheel SetWarranty : 12-month TRW limited warranty from installation date or 18-month TRW limited warranty from delivery date, whichever occurs firstProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : European Vehicle PartsReplaces OE Number : 45564, 850289, 60007001, 14HR005, 45564G, 980949R, BR901086, 4779953AB, 46403088, 46403959, 46445004, 46445892, 46448168, 46758714, 60806135, 60810404, 60812422, 60813038, 82433918, 82440356, 82450657, 82451746, 68088919AA, 68190118AAReturns Policy : 30-Day Return PolicyInterchange Part Number : 12104001, 45564, 850289, 60007001, 14HR005, 45564G, 980949R, BR901086, 12104004, 4779953AB, 46403088, 46403959, 46445004, 46445892, 46448168, 46758714, 60806135, 60810404, 60812422, 60813038, 82433918, 82440356, 82450657, 82451746, JSTPSSCP1569, 5001569, MGD1569CH, 68088919AA, JSTPSSCP1618A, EHT1778H, 68190118AA
KIT-TRW101921-290 Front and Rear Brake Disc and Pad Kit, Plain Surface 5 Lugs - Front; 5 Lugs - Rear Ceramic Premium Friction Series
Part Number: KIT-TRW101921-290
Vehicle Info Required to Guarantee Fit
$195.99
Product Details
Location : Front And RearAttention Needed :

Models have multiple versions, check or measure your original product to order the correct SKU.

Components : (4) Brake Disc and (2) Brake Pad SetSeries : Premium Friction SeriesDisc Design : Plain SurfaceDisc Finish : NaturalPad Material : CeramicRecommended Use : OE ReplacementNumberof Lugs : 5 Lugs - Front; 5 Lugs - RearDisc Material : Cast IronQuantity Sold : 4-Wheel SetWarranty : 12-month TRW limited warranty from installation date or 18-month TRW limited warranty from delivery date, whichever occurs firstProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : European Vehicle PartsReplaces OE Number : 43199, 850418, 12158015, 60042014, 72143DL, 901392G, 981643R, 68249840AAReturns Policy : 30-Day Return PolicyInterchange Part Number : 12158015, 43199, 850418, 60042014, 72143DL, 901392G, 981643R, 1216308, 68249840AA, JSTPSSCP1809, MGD1809CH, JSTPSSCP1811, MGD1811CH
K7245 Front and Rear Brake Disc and Pad Kit, Cross-drilled and Slotted 4 Lugs Carbon Fiber Ceramic Z23 Evolution Sport Series
Part Number: P15K7245
Vehicle Info Required to Guarantee Fit
$340.99
Product Details
Location : Front And RearComponents : Set Components - (4) Brake Discs and (8) Brake PadsSeries : Z23 Evolution Sport SeriesDisc Design : Cross-drilled and SlottedPad Material : Carbon Fiber CeramicRecommended Use : Performance ReplacementNumberof Lugs : 4 LugsQuantity Sold : 4-Wheel SetWarranty : 3-year / 36000-mile Powerstop limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

K7168 Front Brake Disc and Pad Kit, Cross-drilled and Slotted 4 Lugs Carbon Fiber Ceramic Z23 Evolution Sport Series
Part Number: P15K7168
Vehicle Info Required to Guarantee Fit
$206.82
Product Details
Location : FrontComponents : Brake Pads, Rotors And HardwareSeries : Z23 Evolution Sport SeriesDisc Design : Cross-drilled and SlottedDisc Finish : Silver zinc-platedPad Material : Carbon Fiber CeramicRecommended Use : Performance ReplacementNumberof Lugs : 4 LugsDisc Material : Cast IronQuantity Sold : 2-Wheel SetWarranty : 3-year / 36000-mile Powerstop limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Antimony Trioxide, Lead, Nickel, Cobalt and Carbon (Black), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

K7358 Front Brake Disc and Pad Kit, Cross-drilled and Slotted 4 Lugs Carbon Fiber Ceramic Z23 Evolution Sport Series
Part Number: P15K7358
Vehicle Info Required to Guarantee Fit
$184.15
Product Details
Location : FrontComponents : Brake Pads, Rotors And HardwareSeries : Z23 Evolution Sport SeriesDisc Design : Cross-drilled and SlottedDisc Finish : Silver zinc-platedPad Material : Carbon Fiber CeramicRecommended Use : Performance ReplacementNumberof Lugs : 4 LugsDisc Material : Cast IronQuantity Sold : 2-Wheel SetWarranty : 3-year / 36000-mile Powerstop limited warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Antimony Trioxide, Lead, Nickel, Cobalt and Carbon (Black), which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Page 1 of 17 | Showing 1 - 15 of 251 results

Top Rated Products

Helpful Automotive Resources

How Often Do Brakes Need to Be Replaced?
How Often Do Brakes Need to Be Replaced?Pro Tips are nuggets of information direct from ASE-certified automobile technicians working with CarParts.com, which may include unique, personal insights based on their years of experience working in the automotive industry. These can help you make more informed decisions about your car.
A Short Course on Brakes
A Short Course on BrakesWhen you step on the brake pedal, you are actually pushing against a plunger in the master cylinder, which forces hydraulic oil (brake fluid) through a series of tubes and hoses to the braking unit at each wheel. Since hydraulic fluid (or any fluid for that matter) cannot be compressed,
How Do Car Brakes Work?
How Do Car Brakes Work?Stepping on the pedal activates its lever and its connected piston. Powered by your foot, the lever forces a piston inside the master cylinder. The piston then displaces brake fluid out of the cylinder and into the lines that lead to either the brake calipers (in a disc brake system)