2000 Infiniti Q45 Brake Parts

CARDONE Master Cylinder Bench Bleeder Tool cuts typical bleeding procedures in half and is a more effective way to purge the brake system of air than other bleeding procedures. This handy, innovative tool is a must, just as bench bleeding is for removing all the air from your brake system, allowing you to spend less time in the garage, and more time on the road.

Product Features:

• Each unit is 100% new, providing consistent performance when servicing your brake system
• Easy to transfer for on-the-spot master cylinder bleeding
• Fluid measurements clearly displayed on each unit in both ounces and milliliters for convenience
• Easy to clean to ensure no cross contamination
• Durability for long lasting performance

CARDONE Remanufactured Power Brake Boosters are re-engineered, built and tested to match O.E. performance. Original designs are scrutinized for potential improvement and, where applicable, design upgrades are implemented to produce a more durable part than the original. All units are 100% tested to ensure perfect fit and function.

Product Features:

• 100% O.E. quality seals, diaphragms and check valves are installed on every unit for like-new performance and reliability.
• Exclusive rust-prohibitive finishing process extends unit life.
• Master cylinder output rods are pre-adjusted (when included) for easier and faster installation.
• All units are 100% tested to ensure reliable performance.
• Guaranteed fit and function.

Brakes are designed as a system and all the parts need to work together for best performance. The braking system is arguably its most important system, so you want to be sure it’s working properly at all times. With this kit, you can be sure the brake adjustments are occurring at the proper intervals to prevent negative comebacks.

Product Features:

• This part matches Original Equipment (OE) quality specifications which means that it is at least as good if not better than the original part the manufacturer supplied with the car
• Low-friction PTFE coating to reduce drag
• Maintains safe movement and effective stopping performance
• Corrosion resistant coating for long-lasting durability against harsh roads
• Maintains safe movement and effective stopping performance
• Helps deliver a quieter, more efficient braking system
• Stainless Steel dual coated

PowerStop is on a mission to deliver an easy way for any driver to upgrade their brakes – no matter where or how they use their vehicle. Forget standard, off-the-shelf parts. Our Z23 Evolution Sport Brake Upgrade Kit comes with everything you need, from pads, rotors and premium stainless-steel hardware for an easy, bolt-on upgrade for your daily-driver. Along with increased braking power, the Carbon-Fiber Ceramic brake pads feature a low-dust formula to keep those wheels looking great while you say goodbye to nasty brake dust. These pads combine with Drilled & Slotted rotors to ensure a cool, smooth ride that protects against rust and corrosion. Give your daily-driver the easy and affordable performance upgrade it deserves with the Z23 Evolution Sport Brake Upgrade Kit.

Product Features:

• This complete upgrade kit is engineered to improve the braking performance of the vehicle you use everyday
• PowerStop engineered Carbon-Fiber Ceramic Z23 compound significantly enhances braking performance versus traditional ceramic brake pads
• Low-dust braking validated through on-vehicle 3rd party tests in Los Angeles, showing on average 30% less dust versus OE
• Multi-Layer rubberized shims provide virtually noise-free braking
• Drilled & Slotted performance rotors provide maximum cooling
• Includes stainless-steel installation hardware and high-temperature ceramic brake lubricant
• Bolt-on upgrade for stock brakes, no modifications necessary
• Brake rotor, pad & hardware engineered to work together to increase stopping power, improve durability & eliminate dust
• Rotors are zinc plated for maximum protection against rust.
• Buy with confidence from the originator & industry leader of brake kits

Carquest Platinum painted brake rotors meet or exceed original equipment (O.E.) specifications, delivering superior stopping power with proper harmonic design and non-directional finish that eliminate noise. Carquest Platinum painted rotors feature RotorShield, a rust-inhibiting barrier that provides up to 5 times more protection than non-painted rotors. The RotorShield barrier is applied to the rotor hat to protect from unsightly rust and help maintain a like-new appearance. Our rotors are designed to effectively dissipate heat, helping to eliminate brake fade and increase the life of the pads and rotors. Carquest Platinum painted brake rotors are designed for long-lasting and quiet braking with superior performance.

Product Features:

• Engineered to withstand 120 hours of salt spray testing
• Meets or exceeds OE design for superior stopping power
• Exceeds ISO manufacturing guidelines (International Organization for Standardization)
• Matches OE vane size for proper cooling
• Optimal metallurgy and casting thickness to preventing warping
• Air gap eliminates brake fade and increases pad life
• Non-directional finish decreases break-in time

PowerStop is on a mission to deliver an easy way for any driver to upgrade their brakes – no matter where or how they use their vehicle. Forget standard, off-the-shelf parts. Our Z23 Evolution Sport Brake Upgrade Kit comes with everything you need, from pads, rotors and premium stainless-steel hardware for an easy, bolt-on upgrade for your daily-driver. Along with increased braking power, the Carbon-Fiber Ceramic brake pads feature a low-dust formula to keep those wheels looking great while you say goodbye to nasty brake dust. These pads combine with Drilled & Slotted rotors to ensure a cool, smooth ride that protects against rust and corrosion. Give your daily-driver the easy and affordable performance upgrade it deserves with the Z23 Evolution Sport Brake Upgrade Kit.

Product Features:

• This complete upgrade kit is engineered to improve the braking performance of the vehicle you use everyday
• PowerStop engineered Carbon-Fiber Ceramic Z23 compound significantly enhances braking performance versus traditional ceramic brake pads
• Low-dust braking validated through on-vehicle 3rd party tests in Los Angeles, showing on average 30% less dust versus OE
• Multi-Layer rubberized shims provide virtually noise-free braking
• Drilled & Slotted performance rotors provide maximum cooling
• Includes stainless-steel installation hardware and high-temperature ceramic brake lubricant
• Bolt-on upgrade for stock brakes, no modifications necessary
• Brake rotor, pad & hardware engineered to work together to increase stopping power, improve durability & eliminate dust
• Rotors are zinc plated for maximum protection against rust.
• Buy with confidence from the originator & industry leader of brake kits

PowerStop is on a mission to deliver an easy way for any driver to upgrade their brakes – no matter where or how they use their vehicle. Forget standard, off-the-shelf parts. Our Z23 Evolution Sport Brake Upgrade Kit comes with everything you need, from pads, rotors and premium stainless-steel hardware for an easy, bolt-on upgrade for your daily-driver. Along with increased braking power, the Carbon-Fiber Ceramic brake pads feature a low-dust formula to keep those wheels looking great while you say goodbye to nasty brake dust. These pads combine with Drilled & Slotted rotors to ensure a cool, smooth ride that protects against rust and corrosion. Give your daily-driver the easy and affordable performance upgrade it deserves with the Z23 Evolution Sport Brake Upgrade Kit.

Product Features:

• This complete upgrade kit is engineered to improve the braking performance of the vehicle you use everyday
• PowerStop engineered Carbon-Fiber Ceramic Z23 compound significantly enhances braking performance versus traditional ceramic brake pads
• Low-dust braking validated through on-vehicle 3rd party tests in Los Angeles, showing on average 30% less dust versus OE
• Multi-Layer rubberized shims provide virtually noise-free braking
• Drilled & Slotted performance rotors provide maximum cooling
• Includes stainless-steel installation hardware and high-temperature ceramic brake lubricant
• Bolt-on upgrade for stock brakes, no modifications necessary
• Brake rotor, pad & hardware engineered to work together to increase stopping power, improve durability & eliminate dust
• Rotors are zinc plated for maximum protection against rust.
• Buy with confidence from the originator & industry leader of brake kits

Carquest Wearever rotors meet or exceed original equipment specifications while delivering superior stopping power. Carquest Wearever rotors are manufactured with proper harmonic design and non-directional finish that eliminate noise and enhance pedal feel. Our rotors are designed to effectively dissipate heat, helping to eliminate brake fade and increase the life of your pads and rotors. Carquest Wearever rotors are designed for long-lasting and quiet braking with superior performance.

Product Features:

• Meets or exceeds OE design for superior stopping power
• Exceeds ISO manufacturing guidelines (International Organization for Standardization)
• Matches OE vane size for proper cooling
• Optimal metallurgy and casting thickness to prevent warping
• Air gap eliminates brake fade and increases pad life
• Non-Directional finish decreases break-in time

WBR Run True Technology Metallurgic-Gray (MG) Finished Rotors All World Brake Resources (WBR) brake rotors with Run-True technology are manufactured to match the exact OE fit, OE construction, and precision finishing to ensure quick and easy installation, as well as trouble-free functionality for the life of the rotor. The Metallurgic-Gray coating is applied to all outward non-friction surfaces including in the gap between the plates covering the cooling vanes and cured through an oven drying process. The Gray coating provides an effective anti-rust protection to help maintain a clean appearance. The coating used for WBR is also similar to the OE color used by many OE car makes. WBR Brake Rotors with Run-True Technology have ultra tight tolerances that provide the finest braking experience, from break in throughout the life of the rotor, reducing the chance of warping even under extreme braking temperatures. The coated brake disc provides a protective water based coating that prevents rust and corrosion, extended rotor life and improved visual appearance. WBR Brake Rotors are manufactured to meet or exceed the original equipment manufacturer specification for durability, fit, and function.

Product Features:

• High metallurgical and machining standard to improve stopping distances
• Produced to match OE design fitment – G 3000 gray iron
• Mill balanced
• TS16949 certified
• Non-directional finish provides smooth vibration free performance
• No need for machining prior to installation
• Durable Metallurgic-Gray finish to all outward non-friction surfaces
• Metallurgic-Gray anti-rust protection to help maintain a clean appearance
• Compatible with NAO, Ceramic and Semi-Met pad compounds for reduced noise
• Designed to minimize brake fade and extend pad and rotor life
• 24/24 Warranty – limited warranty against defects in material and workmanship Technical Service Bulletins

Using advanced re-engineering materials and processes, our master cylinders match O.E. performance and fitment. New O.E.-quality seals and cups are installed on each unit, ensuring leak-free, long-lasting performance. Cast-iron master cylinders are treate

Product Features:

• Only new O.E.-quality seals and cups are used in the remanufacturing process to ensure O.E. performance and reliability. All rubber components meet S.A.E. specifications.
• Bleeding kits are supplied with the unit to make the bleeding process faster and easier (where applicable).
• Bores meet critical micro-finish specifications to eliminate pitting and corrosion, a cause of premature failure.
• Cast-iron master cylinders feature a premium protective coating to minimize rust and extend unit life.
• Piston assemblies are height-gauged to ensure the master cylinder equals the O.E. unit performance.
• Plastic reservoirs are vacuum-tested to ensure they are leak free.

Using advanced re-engineering materials and processes, our master cylinders match O.E. performance and fitment. New O.E.-quality seals and cups are installed on each unit, ensuring leak-free, long-lasting performance. Cast-iron master cylinders are treate

Product Features:

• Only new O.E.-quality seals and cups are used in the remanufacturing process to ensure O.E. performance and reliability. All rubber components meet S.A.E. specifications.
• Bleeding kits are supplied with the unit to make the bleeding process faster and easier (where applicable).
• Bores meet critical micro-finish specifications to eliminate pitting and corrosion, a cause of premature failure.
• Cast-iron master cylinders feature a premium protective coating to minimize rust and extend unit life.
• Piston assemblies are height-gauged to ensure the master cylinder equals the O.E. unit performance.
• Plastic reservoirs are vacuum-tested to ensure they are leak free.

Brakes are designed as a system and all the parts need to work together for best performance. Industry brake service experts agree – when brake friction materials are ready to be replaced, the hardware is too. A complete brake job that includes new hardwa

Product Features:

• This part matches Original Equipment (OE) quality specifications
• Easy and fast replacement
• Prevents noise and premature wear
• Provides longer brake life and performance

Brakes are designed as a system and all the parts need to work together for best performance. Industry brake service experts agree – when brake friction materials are ready to be replaced, the hardware is too. A complete brake job that includes new hardware goes a long way toward preventing comebacks. Changing out your Rubber Pin Boot or Slider Bushing Kit will ensure the guide pins are clean and free from debris for smoother braking.

Product Features:

• This part matches Original Equipment (OE) quality specifications
• Easy and fast replacement
• Maintains proper movement for safe, effective stopping performance
• Prevents noise and premature wear

Carquest Premium Brake Calipers are manufactured to meet or exceed original equipment manufacturer specifications for performance and durability. Where applicable, Carquest Premium Brake Calipers feature a specially formulated OE style zinc di-chromate anti-corrosion finish that provides superior rust protection in all conditions. Carquest Premium Brake Calipers feature new OE design, stainless steel pistons manufactured for maximum durability, and precision machined for an exacting fit and smooth application of braking force. Carquest Premium Brake Calipers include 100% new OE design dust boots and EPDM rubber seals that provide increased resistance to thermal deterioration and years of-leak free operation. Carquest Premium Brake Calipers include application-specific brackets and abutment hardware where required, for easy installation and confident restoration of stopping power. 100% end-of-line inspection and pressure testing guarantees perfect performance right out of the box.

Product Features:

• Meets or exceeds original equipment specifications for performance and durability
• OE design stainless steel pistons provide maximum durability and are precision machined for a perfect fit in the caliper body
• Application-specific caliper bodies for easy installation
• Brackets included where required, for complete system restoration
• Meets or exceeds original equipment specifications for performance and durability
• OE design stainless steel pistons provide maximum durability and are precision machined for a perfect fit in the caliper body
• Application-specific caliper bodies for easy installation
• Brackets included where required, for complete system restoration
• OE style, zinc di-chromate anti-corrosion finishes provide superior resistance to rust on all iron caliper bodies and brackets
• 100% new, OE style rubber dust boots and EPDM rubber seals for improved resistance to thermal deterioration and cracking
• New bleeder screws, banjo bolts, and crush washers included for a complete repair
• OE Style, stainless steel pad abutment hardware included
• 100% end-of-line inspection and pressure testing ensures quality and performance
• Caliper finish or coating may vary

Carquest Premium Brake Calipers are manufactured to meet or exceed original equipment manufacturer specifications for performance and durability. Where applicable, Carquest Premium Brake Calipers feature a specially formulated OE style zinc di-chromate anti-corrosion finish that provides superior rust protection in all conditions. Carquest Premium Brake Calipers feature new OE design, stainless steel pistons manufactured for maximum durability, and precision machined for an exacting fit and smooth application of braking force. Carquest Premium Brake Calipers include 100% new OE design dust boots and EPDM rubber seals that provide increased resistance to thermal deterioration and years of-leak free operation. Carquest Premium Brake Calipers include application-specific brackets and abutment hardware where required, for easy installation and confident restoration of stopping power. 100% end-of-line inspection and pressure testing guarantees perfect performance right out of the box.

Product Features:

• Meets or exceeds original equipment specifications for performance and durability
• OE design stainless steel pistons provide maximum durability and are precision machined for a perfect fit in the caliper body
• Application-specific caliper bodies for easy installation
• Brackets included where required, for complete system restoration
• Meets or exceeds original equipment specifications for performance and durability
• OE design stainless steel pistons provide maximum durability and are precision machined for a perfect fit in the caliper body
• Application-specific caliper bodies for easy installation
• Brackets included where required, for complete system restoration
• OE style, zinc di-chromate anti-corrosion finishes provide superior resistance to rust on all iron caliper bodies and brackets
• 100% new, OE style rubber dust boots and EPDM rubber seals for improved resistance to thermal deterioration and cracking
• New bleeder screws, banjo bolts, and crush washers included for a complete repair
• OE Style, stainless steel pad abutment hardware included
• 100% end-of-line inspection and pressure testing ensures quality and performance
• Caliper finish or coating may vary

Brakes are designed as a system and all the parts need to work together for best performance. Industry brake service experts agree – when brake friction materials are ready to be replaced, the hardware is too. Caliper Guide Pins are important to replace because they hold the brake piston in place to create effective stopping performance.

Product Features:

• This part matches Original Equipment (OE) quality specifications
• Easy and fast replacement
• Ensures the brake pads are meeting the rotors at the correct angle for an even braking system
• Corrosion resistant coating for long-lasting durability against harsh roads
• Manufactured with quality materials to suppress high stress levels
• Helps deliver a quieter, more efficient braking system

Brakes are designed as a system and all the parts need to work together for best performance. Industry brake service experts agree – when brake friction materials are ready to be replaced, the hardware is too. Caliper Guide Pins are important to replace because they hold the brake piston in place to create effective stopping performance.

Product Features:

• This part matches Original Equipment (OE) quality specifications
• Easy and fast replacement
• Helps deliver a quieter, more efficient braking system
• Corrosion resistant coating for long-lasting durability against harsh roads
• Manufactured with quality materials to suppress high stress levels

Carquest Premium Brake Calipers are manufactured to meet or exceed original equipment manufacturer specifications for performance and durability. Where applicable, Carquest Premium Brake Calipers feature a specially formulated OE style zinc di-chromate anti-corrosion finish that provides superior rust protection in all conditions. Carquest Premium Brake Calipers feature new OE design, stainless steel pistons manufactured for maximum durability, and precision machined for an exacting fit and smooth application of braking force. Carquest Premium Brake Calipers include 100% new OE design dust boots and EPDM rubber seals that provide increased resistance to thermal deterioration and years of-leak free operation. Carquest Premium Brake Calipers include application-specific brackets and abutment hardware where required, for easy installation and confident restoration of stopping power. 100% end-of-line inspection and pressure testing guarantees perfect performance right out of the box.

Product Features:

• Meets or exceeds original equipment specifications for performance and durability
• OE design stainless steel pistons provide maximum durability and are precision machined for a perfect fit in the caliper body
• Application-specific caliper bodies for easy installation
• Brackets included where required, for complete system restoration
• Meets or exceeds original equipment specifications for performance and durability
• OE design stainless steel pistons provide maximum durability and are precision machined for a perfect fit in the caliper body
• Application-specific caliper bodies for easy installation
• Brackets included where required, for complete system restoration
• OE style, zinc di-chromate anti-corrosion finishes provide superior resistance to rust on all iron caliper bodies and brackets
• 100% new, OE style rubber dust boots and EPDM rubber seals for improved resistance to thermal deterioration and cracking
• New bleeder screws, banjo bolts, and crush washers included for a complete repair
• OE Style, stainless steel pad abutment hardware included
• 100% end-of-line inspection and pressure testing ensures quality and performance
• Caliper finish or coating may vary

Carquest Premium Brake Calipers are manufactured to meet or exceed original equipment manufacturer specifications for performance and durability. Where applicable, Carquest Premium Brake Calipers feature a specially formulated OE style zinc di-chromate anti-corrosion finish that provides superior rust protection in all conditions. Carquest Premium Brake Calipers feature new OE design, stainless steel pistons manufactured for maximum durability, and precision machined for an exacting fit and smooth application of braking force. Carquest Premium Brake Calipers include 100% new OE design dust boots and EPDM rubber seals that provide increased resistance to thermal deterioration and years of-leak free operation. Carquest Premium Brake Calipers include application-specific brackets and abutment hardware where required, for easy installation and confident restoration of stopping power. 100% end-of-line inspection and pressure testing guarantees perfect performance right out of the box.

Product Features:

• Meets or exceeds original equipment specifications for performance and durability
• OE design stainless steel pistons provide maximum durability and are precision machined for a perfect fit in the caliper body
• Application-specific caliper bodies for easy installation
• Brackets included where required, for complete system restoration
• Meets or exceeds original equipment specifications for performance and durability
• OE design stainless steel pistons provide maximum durability and are precision machined for a perfect fit in the caliper body
• Application-specific caliper bodies for easy installation
• Brackets included where required, for complete system restoration
• OE style, zinc di-chromate anti-corrosion finishes provide superior resistance to rust on all iron caliper bodies and brackets
• 100% new, OE style rubber dust boots and EPDM rubber seals for improved resistance to thermal deterioration and cracking
• New bleeder screws, banjo bolts, and crush washers included for a complete repair
• OE Style, stainless steel pad abutment hardware included
• 100% end-of-line inspection and pressure testing ensures quality and performance
• Caliper finish or coating may vary

CARQUEST premium engine management products provide the right automatic transmission speed sensor for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions. Designed to meet OE quali

Product Features:

• Lifecycle tested to meet or exceed OE specifications
• Direct OE replacement
• High strength thermoplastic is resistant to shock, temperature and chemicals. Also protects internal components from moisture and contaminants.
• Global coverage for import and/or domestic applications.

CARQUEST premium engine management products provide the right products for a wide range of domestic and import applications. Delivering the highest performance and durability under demanding conditions.

Wagner TQ® brake pads feature a zero-copper friction formulation and a unique Integrally Molded Insulator (IMI) technology for quieter operation.

Product Features:

• LONG LIFE — Superior formulation design dissipates heat for long-lasting friction performance and reduced brake fade
• HARDWARE INCLUIDO: Hardware de acero inoxidable de primera calidad incluido para aplicaciones selectas

Product Features:

• Made in the USA
• OE Manufacturer
• Ceramic Brake Pad
• Low Dust
• Powerful Quiet Stopping
• Ultra-Premium
• Perfect Upgrade for all Braking Systems

Brakes are designed as a system and all the parts need to work together for best performance. The boot and square cut seals included in our Caliper Repair Kit, ensure that the caliper works as designed during the apply and release cycle.

Product Features:

• This part matches Original Equipment (OE) quality specifications
• Increases the life span of the brake pads
• Restores brakes to like-new performance
• Prevents noise and premature wear
• Direct replacement for a proper fit

Brakes are designed as a system and all the parts need to work together for best performance. The boot and square cut seals included in our Caliper Repair Kit, ensure that the caliper works as designed during the apply and release cycle.

Product Features:

• This part matches Original Equipment (OE) quality specifications
• Increases the life span of the brake pads
• Restores brakes to like-new performance
• Prevents noise and premature wear
• Direct replacement for a proper fit

Choosing the right Ceramic brake pads is a big decision: after all, they will be fitted to a vehicle carrying precious cargo; so you need to make an informed choice and get it right. With more than 100 years’ experience, we are pioneers in the development of braking systems and technologies and work closely with the world’s leading vehicle manufacturers. As a consumer, you should expect safety, quality and performance from a brake pad. With its superior range of Ceramic Brake Pads, TRW offers you all that, and more. We design our Ceramic Brake Pads using vehicle-optimized friction formulations which are focussed on eliminating noise, vibration and harshness (NVH) and severely reducing wheel dust; while at the same time increasing durability and smooth braking actions. We engineer our brake pads to precise Original Equipment (OE) standards, and test them to the extreme both in the lab and in real life, real road situations at every speed and on every terrain. In addition, our Ceramic Brake Pads deliver what we in the business call ‘fadeless performance’ to counteract the heat that braking in heavy traffic creates which could result in a lack of performance. All TRW products are taken to market under the ‘Safety’ strapline. We never deviate from this and we never compromise because we believe that every stop could be that safety critical stop. We wouldn’t put our name to something that we wouldn’t fit in our own vehicles to transport our own families. All of this adds up to one fact: You really can trust TRW to provide superior Ceramic Brake Pads to deliver the ultimate in braking experience.

Product Features:

• For the best and safest performance – we mirror OE and provide the optimum friction formulation for each make and model
• For the quietest braking – TRW applies ‘bonded Nitrile rubber-coated steel shims; proven to be the best noise damping material to all its Ceramic Brake Pads
• The intelligent design includes slots & chamfers which prevents dirt and dust build up on the friction surface; giving more effective contact and reducing noise
• Using the latest technology, TRW designs its Ceramic Brake Pads with an emphasis on dust reduction; giving you the safest stop while keeping your wheels clean
• We provide all necessary accessories, including installation hardware and grease, together with fitting instructions with each part for a safe and easy brake pad change
• TRW covers 98% of all vehicles on the road in North America both imports and domestic

Carquest Platinum Professional brake pads are a premium alternative to original equipment brake pads that provide superior stopping performance, quieter braking and cleaner wheels. All CQ Platinum Professional brake pads are manufactured by a vertically

Product Features:

• Industry leading number of application specific formulations for maximum performance and extended pad life
• On-vehicle testing similar to original equipment tests
• Updated HEX Shim Technology – engineered with aramid fibers to reduce noise and prevent shim wear
• Burnishing compound allows for a faster break-in of pads and rotors
• PTFE coated hardware and caliper pin grease included for nearly every application
• PTFE coated hardware and caliper pin grease included for nearly every application

Carquest Standard brake pads are designed for original equipment (O.E.) fit, form and function for dependable stopping while providing great value. Our brake pads use quality friction formulas for reliable stopping power. Carquest Standard brake pads feature a single-layer shim that absorbs noise and vibration to provide quiet braking. These brake pads also utilize slots and chamfers based on the OE design. Carquest Standard brake pads are the right choice when looking for good performance at a great price.

Product Features:

• Dependable stopping power
• Single layer shim for quiet braking
• OE-designed slots and chamfers to reduce noise and vibration
• Powder-coated backing plate prevents corrosion