RS03-27-100N MAZDA Driving

Review MAZDA Genuine Driving Diff

The Mazda RS03 is a high-performance racing car engine, specifically model number RS03-27-100N, which was developed for use in the Mazda Road to 24 series and other racing events. This engine is a 2.0-liter, four-cylinder, naturally-aspirated powerhouse that delivers an impressive output of 100ps (ps stands for Psychic Horsepower, a unit of measurement used in Japanese motor racing).

The Mazda RS03-27-100N engine is renowned for its high-revving nature, with a redline reaching up to 9,500 rpm. This allows racers to extract maximum power from the engine, making it an ideal choice for those seeking a thrilling driving experience. It boasts a compact and lightweight design, with a dry sump lubrication system that ensures optimal engine performance even during high-speed cornering.

The engine block is made of aluminum, which not only contributes to its lightweight construction but also enhances its durability and heat dissipation capabilities. The cylinder head features large intake and exhaust valves, which, combined with the high-performance camshafts, enable efficient air and fuel intake and exhaust gases expulsion.

The Mazda RS03-27-100N engine is equipped with a multi-point fuel injection system that ensures precise fuel delivery, optimizing the combustion process for maximum power output. It also features a high-performance exhaust system, which includes a high-flow catalytic converter, ensuring that the engine runs efficiently while also adhering to emissions regulations.

This Mazda racing engine is designed to provide racers with a responsive and agile powertrain, allowing them to navigate the racetrack with ease and precision. Its high-performance design, combined with its compact and lightweight construction, makes it an ideal choice for those seeking a competitive edge on the racetrack.

In summary, the Mazda RS03-27-100N engine is a high-performance, naturally-aspirated, 2.0-liter four-cylinder racing engine that delivers an impressive 100ps output, with a redline reaching up to 9,500 rpm. Its lightweight and compact design, combined with its high-revving nature, makes it an ideal choice for those seeking a thrilling and competitive driving experience on the racetrack.

Mazda RS03 is a high-performance version of the Mazda 3 model, specifically produced for the Japanese Domestic Market (JDM) and limited international markets. Here are some pros and cons of buying a Mazda RS03:

1. Powerful engine: The Mazda RS03 is equipped with a 2.3-liter turbocharged Skyactiv-G engine that produces 100 ps (ps stands for Pferdest rke, which is a German metric horsepower unit) or 101 bhp (bhp stands for brake horsepower) and 184 Nm of torque. This engine delivers impressive power and acceleration, making the RS03 an exciting and engaging vehicle to drive.

2. Agile handling: The Mazda RS03 boasts precise and responsive steering, which enhances its agility and makes it a joy to drive on winding roads. Its lightweight body and well-balanced chassis contribute to its excellent handling capabilities.

3. Unique design: The Mazda RS03 stands out from other Mazda 3 models with its exclusive design features, such as its unique front and rear bumpers, side skirts, and rear spoiler. These styling elements give the RS03 a sporty and aggressive appearance that appeals to many car enthusiasts.

4. Affordable price: Compared to other high-performance compact cars, the Mazda RS03 is relatively affordable, making it an attractive option for those who want a fun and engaging driving experience without breaking the bank.

5. Reliability: Mazda is known for building reliable cars, and the RS03 is no exception. It comes with Mazda's comprehensive warranty coverage, which gives buyers peace of mind and confidence in their purchase.

1. Limited availability: The Mazda RS03 is not sold in many markets outside of Japan, which makes it a rare and hard-to-find vehicle. This limited availability may make it more expensive to purchase and import, if that is an option.

2. Fuel efficiency: The turbocharged engine in the Mazda RS03 delivers impressive performance, but it comes at the cost of reduced fuel efficiency. The RS03 is not as fuel-efficient as other Mazda 3 models, which may be a concern for those who prioritize low fuel consumption.

3. Limited interior features: While the Mazda RS03's exterior is adorned with unique design features, its interior is more spartan. It comes with fewer standard features than other Mazda 3 models, which may be a drawback for some buyers.

4. Limited aftermarket support: Due to its limited availability, there may be limited aftermarket support for the Mazda RS03. This could make it more difficult and expensive to find replacement parts or perform modifications.

The Mazda RS03 is a unique and exciting compact car that offers impressive performance, agile handling, and a distinct design. While it has some drawbacks, such as limited availability and fewer interior features, its affordability and reliability make it an attractive option for car enthusiasts who want a high-performance vehicle without the hefty price tag of some competitors. If you can look past its limitations and appreciate its strengths, the Mazda RS03 could be an excellent choice for your next car.

If you are in the market for a high-performance compact car and are drawn to the Mazda RS03's unique design and impressive engine, I would recommend considering it as an option. However, be prepared for its limited availability, spartan interior, and reduced fuel efficiency. If these factors are deal-breakers for you, you may want to explore other options in the same class. Ultimately, the Mazda RS03 is a vehicle that appeals to those who value performance, agility, and a distinct design over practical considerations.

Details:

Parts must be resalable and in the original packaging. In stock orders ship within 24 hours. Shipping carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Electrical parts are not returnable.

specifications differentialsdepo:

• brand: Mazda
• mpn: Rs03-27-100n
• genuine oem: Yes
• warranty: 1 Year
• fitment type: Direct Replacement
• replaces part number: Rs0327100g

seller differentialsdepo:

• # reviews: 1542
• rating: 99.2%
• city: dallas, texas

payments differentialsdepo:

• credit card: mastercard
• other
• wallet: google-pay

returns differentialsdepo:

• paid by: seller
• time: 30 days
• policy: returns accepted

offer differentialsdepo:

• options: ship-to-home
• sold #: 12
• started: may 14, 2026
• availability: in stock
• prices: $391.10–$459.12
• item condition: New
• in stock #: 4

shipping differentialsdepo:

• transit: 5-12 days
• type: fixed
• class: standard
• service: standard

general differentialsdepo:

• category: Auto Parts > Transmission Drivetrain > Differentials > Assemblies