2003 Subaru WRX Transmission Parts

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    • (0 reviews)
      Subaru WRX Subaru 4 Speeds 2003, Automatic Transmission Extension Housing Seal by National®. Don’t just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured using exclusive National Dynamic...
      Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection
      $10.29$8.23
      # 20917185
    • (0 reviews)
      Subaru WRX Subaru 4 Speeds 2003, Automatic Transmission Output Shaft Seal by National®. Don’t just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured using exclusive National Dynamic Edge...
      Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection
      $2.99from $2.39 - $8.18
      # 21011541
    • (0 reviews)
      Subaru WRX 2003, High Performance Transmission Oil Cooler Kit by Hayden®. 9/16" - 18 S.A.E. Flare Fittings, Tube and Fin Style. Featuring a lightweight aluminum construction, this high performance transmission oil cooler is...
      All aluminum lightweight constructionElectrostatically powder coated to prevent corrosion
      $48.46from $38.77 - $40.45
      # 23646185
    • (0 reviews)
      Subaru WRX 2003, Rapid-Cool™ Transmission Oil Cooler Kit by Hayden®. 3/8" Push-On Fittings, Plate and Fin Style. This premium transmission oil cooler features a unique plate and fin design, which is 33% more efficient than a...
      Unique plate and fin design33% more efficient than a comparable tube and fin design
      $48.16from $38.53 - $49.02
      # 23646171
    • (0 reviews)
      Subaru WRX 2003, Transmission Oil Cooler Mounting Kit by Hayden®. With this product, you can easily install both your transmission oil cooler and electric fan. This kit includes nylon rods, foam pads, and removable locking buttons.
      Ensures trouble-free installation of transmission coolers and electric fansIncludes nylon rods, foam pads, and removable locking buttons
      $10.53from $8.42 - $16.43
      # 23646175
    • (0 reviews)
      Subaru WRX 2003, Ultra-Cool™ Transmission Oil Cooler Kit by Hayden®. 3/8" Push-On Fittings, Tube and Fin Style. This product is an effective and economical way to keep your transmission at its optimum operating temperature. The...
      High-efficiency turbulators in every tube ensure maximum heat dissipationUltrasonically soldered for reliability
      $33.38from $26.70 - $32.97
      # 23646181
    • (0 reviews)
      Subaru WRX 2003, Premium Pull Type Clutch Kit by RhinoPac®. Disk Size: 9.000" x 1.000" x 24T. Flywheel Spec: FLAT. Pressure Plate Diameter: 9.125". Disk Type: Organic. Without Slave Cylinder. Upgrade your vehicle to a RhinoPac...
      Helps restore factory-like performanceDurable construction for long-term use
      $361.36$289.09
      # 21525042
    • (0 reviews)
      Subaru WRX 2003, SR Series Pull Type Clutch Kit by RhinoPac®. Disk Size: 9.125" x 1.000" x 24T. Flywheel Spec: FLAT. Pressure Plate Diameter: 9.12". Without Slave Cylinder. Upgrade your vehicle to RhinoPac's SR Clutch Kit which...
      Performance upgrade kitEngineered for modified street use
      $659.75from $527.80 - $607.10
      # 21538546
    • (0 reviews)
      Subaru WRX 2003, Clutch Kit by Beck Arnley®, Original Replacement Service Set: Flywheel not Included, 9" Diameter, Spline: 24, 1" Diameter. For one hundred years, Beck/Arnley has been providing premium OE quality parts for...
      OE quality products from top original equipmentTop quality materials
      $351.74$281.39
      # 36225342
    • (0 reviews)
      Subaru WRX 2003, Clutch Master Cylinder by Dorman®. Dorman’s Clutch Master Cylinder effectively returns hydraulic pressure to the clutch system, restoring the ability to shift properly again. Dorman also offers a Clutch Master...
      Direct replacement for a proper fit every timeReinforced nylon, cast iron or aluminum construction for a long service life
      $51.05$40.84
      # 17885437
    • (0 reviews)
      Subaru WRX Standard Transmission 2003, Back Up Light Switch by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to...
      OE quality products from top original equipmentTop quality materials
      $27.49$21.99
      # 36225503
    • (0 reviews)
      Subaru WRX 2003, Clutch Release Bearing by National®. Bearing Assembly - Sealed Self-Aligning. This bearing is manufactured from high quality steel and constructed utilizing state-of-the-art computer controlled heat treatment...
      Possesses excellent antifriction propertiesManufactured utilizing computer controlled heat treatment processes for lasting performance
      $38.13$30.50
      # 20924154
    • (0 reviews)
      Subaru WRX Subaru TY754 5 Speeds 2003, Manual Transmission Input Shaft Seal by National®. Don’t just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured using exclusive National Dynamic Edge...
      Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection
      $10.65$8.52
      # 20930115
    • (0 reviews)
      Subaru WRX Subaru TY754 5 Speeds 2003, Manual Transmission Output Shaft Seal by National®. Don’t just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured using exclusive National Dynamic...
      Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection
      $2.99from $2.39 - $8.18
      # 21011526
    • (0 reviews)
      Subaru WRX Subaru TY754 5 Speeds 2003, Manual Transmission Differential Bearing by National®. This bearing is manufactured from high quality steel and constructed utilizing state-of-the-art computer controlled heat treatment...
      Possesses excellent antifriction propertiesManufactured utilizing computer controlled heat treatment processes for lasting performance
      $30.94$24.75
      # 20928416
    • (0 reviews)
      Subaru WRX Subaru 4 Speeds 2003, Automatic Transmission Extension Housing Repair Sleeve by National®. 2nd Design. 1.365" Shaft. 35 mm I.D. This part is manufactured by one of the most trusted names in the automotive industry to...
      Designed for dependable operation and lasting performanceMeets OE configurations
      $31.78$25.42
      # 20916843
    • (0 reviews)
      Subaru WRX Subaru 4 Speeds 2003, Automatic Transmission Output Shaft Repair Sleeve by National®. This part is manufactured by one of the most trusted names in the automotive industry to keep your vehicle perform optimally. It is...
      Designed for dependable operation and lasting performanceMeets OE configurations
      $29.29$23.43
      # 21011538
    • (0 reviews)
      Subaru WRX 2003, Automatic Transmission Filter by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import...
      OE quality products from top original equipmentTop quality materials
      $17.14from $13.71 - $28.54
      # 35861792
    • (0 reviews)
      Subaru WRX 2003, Spin-on Automatic Transmission Filter by Hastings®. This filter removes dirt, dust, and other contaminants from the automatic transmission fluid to minimize wear inside the system prolonging its service life. The...
      For use with standard and fully synthetic transmission fluidsProlongs the service life of the transmission
      $26.18$20.94
      # 21462038
    • (0 reviews)
      Subaru WRX 2003, Clutch Master Cylinder by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in...
      OE quality products from top original equipmentTop quality materials
      $77.43$61.94
      # 36225583
    • (0 reviews)
      Subaru WRX 2003, Clutch Slave Cylinder by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in...
      OE quality products from top original equipmentTop quality materials
      $37.80$30.24
      # 36225343
    • (0 reviews)
      Subaru WRX Subaru 4 Speeds 2003, Automatic Transmission Torque Converter Repair Sleeve by National®. 1.95" Shaft. This part is manufactured by one of the most trusted names in the automotive industry to keep your vehicle perform...
      Designed for dependable operation and lasting performanceMeets OE configurations
      $28.85$23.08
      # 20921409
    • (0 reviews)
      Subaru WRX Subaru 4 Speeds 2003, Automatic Transmission Torque Converter Seal by National®. Don’t just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured using exclusive National Dynamic...
      Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection
      $10.30$8.24
      # 20922175
    • (0 reviews)
      Subaru WRX Subaru 4 Speeds 2003, Automatic Transmission Oil Pump Seal by National®. Don’t just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured using exclusive National Dynamic Edge...
      Designed to increase wheel-end reliability by effectively excluding dirt, moisture, and other contaminantsA patent-pending National Dynamic Edge technology allows for maximum protection
      $7.33$5.86
      # 20920239
    • (0 reviews)
      Subaru WRX 2003, Transmission Oil Cooler Hose by Hayden®. Size: 11/32" x 4 1/2". This part provides a safe heat and oil resistant connecting line between your oil cooler and transmission. Manufactured from black chemigum, the oil...
      Direct replacement for proper fitMade of black chemigum (nitrile)
      $12.39$9.91
      # 23602418
    • (0 reviews)
      Subaru WRX Subaru TY754 5 Speeds 2003, Manual Transmission Input Shaft Repair Sleeve by National®. This part is manufactured by one of the most trusted names in the automotive industry to keep your vehicle performing optimally. It...
      Designed for dependable operation and lasting performanceMeets OE configurations
      $38.15$30.52
      # 20929451
    • (0 reviews)
      Subaru WRX Subaru TY754 5 Speeds 2003, Manual Transmission Output Shaft Repair Sleeve by National®. This part is manufactured by one of the most trusted names in the automotive industry to keep your vehicle performing optimally. It...
      Designed for dependable operation and lasting performanceMeets OE configurations
      $29.29$23.43
      # 21011523
    • (0 reviews)
      Subaru WRX 2003, Clutch Kit by Exedy®. Do you feel shaking or shuddering when you engage the clutch; hear grinding noise when you shift gears? Does your engine race without an increase in road speed? You’re in need of...
      $315.40from $252.32 - $837.38
      # 50462341
    • (0 reviews)
      Subaru WRX Standard Transmission 2003, Racing Flywheel by Exedy®. Note: Sport Solid one piece billet chrome-moly steel; 5.8 kgs; 8 crank bolts; 124 teeth Specifically designed to reduce weight and inertia for better engine...
      $726.11$580.89
      # 7956965
    • (0 reviews)
      Subaru WRX 2003, Release Bearing by Exedy®. Do you feel shaking or shuddering when you engage the clutch; hear grinding noise when you shift gears? Does your engine race without an increase in road speed? You’re in need of...
      $82.98$66.38
      # 7957002
    • (0 reviews)
      Subaru WRX 2003, AT Filter by Full®. Production: 10/2002, Spin On Type. Do you feel shaking or shuddering when you engage the clutch; hear grinding noise when you shift gears? Does your engine race without an increase in road...
      $34.84$27.87
      # 8029338
    • (0 reviews)
      Subaru WRX 2003, Flywheel by Genuine®. Do you feel shaking or shuddering when you engage the clutch; hear grinding noise when you shift gears? Does your engine race without an increase in road speed? You’re in need of...
      $390.98$312.78
      # 8869704
    • (0 reviews)
      Subaru WRX 2003, Clutch Master Cylinder by Nabtesco®. Do you feel shaking or shuddering when you engage the clutch; hear grinding noise when you shift gears? Does your engine race without an increase in road speed? You’re in need...
      $202.40$161.92
      # 7769964
    • (0 reviews)
      Subaru WRX 2003, Clutch Slave Cylinder by Nabtesco®. Do you feel shaking or shuddering when you engage the clutch; hear grinding noise when you shift gears? Does your engine race without an increase in road speed? You’re in need...
      $87.58$70.06
      # 7770114
    • (0 reviews)
      Subaru WRX Turbocharged 2003, OEM Replacement Clutch Kit by EXEDY®. Pull Type. Includes Flywheel Bolts. Disc Outer Diameter: 228mm. Major Diameter: 25.2mm. Spline Teeth: 24 Teeth. Clamp Load: 2315 Lbs. Product Weight: 15 Lbs....
      $269.28$215.42
      # 7054338
    • (0 reviews)
      Subaru WRX Standard Transmission 2003, Intermotor™ Back Up Light Switch by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive...
      OE quality parts from top original equipment and aftermarket manufacturersFast shipping; 1-2 day delivery time regardless of where you’re located
      $33.75$27.00
      # 45115610
    • (0 reviews)
      Subaru WRX 2003, Auto Trans Fluid by Febi®. When you’re low on oil, coolant or some other fluid, you may be tempted to just run down to the local auto parts chain store. But before you waste your time and gas only to find high...
      $20.76from $16.61 - $22.37
      # 8418287
    • (0 reviews)
      Subaru WRX 2003, Slave Cylinder by EXEDY®. Exedy GlobalParts (formerly Daikin Clutch USA) Clutch Slave Cylinders are top of the line, brand new OEM Clutch Slave Cylinders, built specifically for your vehicle.
      Precision honing of hydraulic cylinders are monitored under OE quality control standards.Anodyzing plating of cylinder bodies strengthens surface, ensuring smooth operation of the piston, and resists corrosion.
      $22.01$17.61
      # 50008562
    • (0 reviews)
      Universal Transmission Oil Cooler Barrier Hose by Hayden®. This part provides a safe heat and oil resistant connecting line between your oil cooler and transmission. Manufactured from black chemigum, the oil cooler hose features a...
      Designed for transmission fluid applicationsMade for tight radius applications found in transmission cooler installations
      $14.36from $11.49 - $35.36
      # 22196995
    • (0 reviews)
      Universal Transmission Oil Cooler Mounting Kit by Hayden®. With this product, you can easily install your transmission oil cooler. This kit includes everything required to easily do the job.
      Quality constructionEnsures trouble-free installation of transmission oil coolers
      $12.25$9.80
      # 22278594
    • (0 reviews)
      Original Trick Shift™ Automatic Transmission Fluid by B&M®. Trick Shift is the easiest way to improve the transmission performance of your vehicle. The fluid can be mixed with stock-type transmission fluids, however to attain...
      Ensures firmer shiftsPour-in performance
      $6.50$5.20
      # 9479195
    • (0 reviews)
      Universal One Seal™ Transmission Stop Leak by Bars Leaks®, 11 oz. The Bar’s Leaks One Seal Stop Leak effectively seals all minor engine oil, transmission and power steering system leaks. It’s specifically designed to stop...
      $3.84$3.07
      # 46061977
    • (0 reviews)
      Universal Repair-IT™ Transmission Repair by Bars Leaks®, 16 oz. This Bar's Leaks formula reduces rough shifting and friction, while eliminating slip, controlling temperature, and repairing shudder, chatter and whining. And how...
      $13.24$10.59
      # 46061966
    • (0 reviews)
      Universal Trans-Kleen™ Automatic Transmission Treatment by CRC®, 12 oz. Smoothes out transmissions, increases shifting performance. Minimizes formation of gum, sludge, acid, and corrosion. Eliminates hesitating, rough shifting,...
      $5.44$4.35
      # 46061903
    • (0 reviews)
      Universal Trans-X™ Automatic Transmission Sealer and Conditioner by K&W®, 15 oz. Effectively repairs leaks in automatic transmissions, power steering and hydraulic systems. Prevents leaks caused by aged seals and gaskets....
      Stops leaks and slipsRestores smooth shifting
      $11.38$9.10
      # 46062118
    • (0 reviews)
      Universal Trans-X™ Automatic Transmission Slip Stop and Stop Leak Fix by K&W®, 30 oz. Effectively repairs leaks in automatic transmissions, power steering and hydraulic systems. Prevents leaks caused by aged seals and gaskets....
      Stops leaks and slipsRestores smooth shifting
      $17.39$13.91
      # 46062120
    • (0 reviews)
      Universal Automatic Transmission Fluid Conditioner by Lucas Oil®, 20 oz. Lucas Automatic Transmission Fluids and Lubricants are designed to withstand high temperatures and pressure. Excellent for high performance transmissions....
      Smooth, precise shiftingExtraordinary protection
      $12.50$10.00
      # 47636713
    • (0 reviews)
      Universal Multi-Vehicle™ Semi-Synthetic Automatic Transmission Fluid by Lucas Oil®, 32 oz. Lucas Automatic Transmission Fluids and Lubricants are designed to withstand high temperatures and pressure. Excellent for high...
      Smooth, precise shiftingExtraordinary protection
      $11.25$9.00
      # 47636712
    • (0 reviews)
      Universal Synthetic Transmission Lubricant by Lucas Oil®, 1 gal. Lucas Automatic Transmission Fluids and Lubricants are designed to withstand high temperatures and pressure. Excellent for high performance transmissions. Greatly...
      Smooth, precise shiftingExtraordinary protection
      $68.75$55.00
      # 47636701
    • (0 reviews)
      Universal Synthetic Transmission Oil SAE 80W-85 by Lucas Oil®, 32 oz. Lucas Automatic Transmission Fluids and Lubricants are designed to withstand high temperatures and pressure. Excellent for high performance transmissions....
      Smooth, precise shiftingExtraordinary protection
      $15.00$12.00
      # 47636726
    • (0 reviews)
      Universal Sure-Shift™ Semi-Synthetic Automatic Transmission Fluid by Lucas Oil®, 32 oz. Lucas Automatic Transmission Fluids and Lubricants are designed to withstand high temperatures and pressure. Excellent for high performance...
      Smooth, precise shiftingExtraordinary protection
      $8.75$7.00
      # 47636697
    • (0 reviews)
      Universal Synthetic Gear Oil by Lucas Oil®. Lucas Gear Oils have needed improving for years, especially in the hi-performance industry. The Lucas gear oil enjoys the technology Lucas developed in making the "Lucas Heavy Duty Oil...
      Contains special anti-wear and lubricity agentsHelps to control heat
      $17.50from $14.00 - $257.00
      # 47637119
    • (0 reviews)
      Universal Transmission Fix™ Stops Slip by Lucas Oil®, 24 oz. Lucas Transmission Fix is a non-solvent formula that stops slip, hesitation and rough shifting in worn transmissions and completely eliminates most seal leaks. Use in...
      Contains no solventsLowers operating temperatures and stops foaming
      $16.25$13.00
      # 47636694
    • (0 reviews)
      Universal Hydralic Clutch Fluid by MotorMedic®, 12 oz. Hydraulic Clutch Fluid is good for the life of the clutch. It meets all OEM specifications and makes shifting easier.
      For Manual Shift vehiclesMeets all OEM specifications
      $4.75$3.80
      # 46062808
    • (0 reviews)
      Universal Synthetic Automatic Transmission Flush by MotorMedic®, 10 oz. TransMedic™ Synthetic Transmission Flush cleans internal components. It does not contain damaging chemical or alcohol residue.
      Use with or without flush equipmentCleans internal components
      $7.24$5.79
      # 46062765
    • (0 reviews)
      Universal Synthetic Transmission Treatment by MotorMedic®, 10 oz. TransMedic™ Automatic Transmission Treatment and Shift Improver helps in eliminating slippage. It restores smooth shifting and reduces wear.
      Helps eliminate slippageRestores smooth shifting
      $9.25$7.40
      # 46062766
    • (0 reviews)
      TranSeal™ Transmission Sealer by MotorMedic®, 12 oz. TranSeal™ Strong Automatic Transmission Sealer conditions seals and stops leaks fast. It is compatible with most ATF and is a assured shift improver.
      Stops leaks fastCompatible with most ATF
      $3.89$3.11
      # 46062771
    • (0 reviews)
      Universal TransMedic™ Automatic Transmission Treatment by MotorMedic®, 12 oz. TransMedic™ Automatic Transmission Treatment and Shift Improver helps in eliminating slippage. It restores smooth shifting and reduces wear.
      Helps eliminate slippageRestores smooth shifting
      $6.38$5.10
      # 46062802
    • (0 reviews)
      Universal Transfusion™ Transmission Fluid and Sealer by MotorMedic®. Automatic transmission fluid and sealer, replaces lost ATF, helps prevent leaks, conditions seals, compatible with Ford, Chrysler and GM OEM fluids.
      Helps prevent leaksReplaces lost ATF
      $4.61$3.69
      # 46062768
    • (0 reviews)
      Transmission Sealer and Cleaner by MotorMedic®, 32 oz. TranSeal™ Strong Automatic Transmission Sealer conditions seals and stops leaks fast. It is compatible with most ATF and is a assured shift improver.
      Stops leaks fastCompatible with most ATF
      $9.09$7.27
      # 46062770



    Guides & Articles
    If you’ve decided it’s time to replace the clutch on your manual-transmission car, you’ve reached the point where advantages (crisp, new-feeling response) have come to outweigh disadvantages (significant labor costs or time spent doing it yourself). Whether you don’t have a choice because your old clutch slips badly, or you want to take initiative and...
    In this article we'll look at the differences between a "transaxle" and a "transmission". In short, a transaxle performs both the gear-changing function of a transmission and the power-splitting ability of an axle differential in one integrated unit. A transmission performs the gear-changing function only, delivering power via a single output shaft at the back of...
    In this installment, we'll give you the steps for replacing the transmission fluid and fluid filter inside your vehicle's automatic transmission – saving you several hundred dollars by sparing you a visit to the shop. This maintenance procedure is a straightforward one, and it's important for the overall longevity of your transmission. The engineers that built...