MITSUBISHI SR-20-4128 Plc Modules

( Brand: Mitsubishi ), ( Manufacturer Part Number: SR-20-4128 ), ( Part Type: Module )

Review MITSUBISHI Sr204128 Used

The **Mitsubishi SR204128** is a legendary inline-four engine that has earned its place in automotive history as one of the most revered and versatile powerplants ever produced. Originally developed in the late 1980s as the **SR20DE**, this 2.0-liter, naturally aspirated engine was a masterclass in engineering, blending high-revving performance with reliability and efficiency. The **SR204128** variant, specifically, represents a refined iteration of this iconic engine, distinguished by its **4128** designation, which refers to its displacement (2.0 liters) and a slightly updated internal design for improved durability and performance. With a **double overhead camshaft (DOHC)** configuration and **16 valves**, the SR204128 delivers a smooth, linear power delivery that thrives across a wide RPM range, making it equally at home in daily driving, track use, or high-performance applications.

At its core, the SR204128 features a **cast-iron block** paired with an **aluminum cylinder head**, a combination that balances strength and weight while resisting warping under high loads. The engine s **interference camshaft design** demands precise timing chain maintenance, a characteristic that has become both a point of pride and a cautionary note for enthusiasts. However, when properly cared for, this engine is renowned for its longevity, with many examples exceeding **200,000 miles** with relatively minor modifications. The **port-injected fuel system** ensures consistent power delivery, while the **distributor ignition** (though later models often feature electronic ignition) provides a classic, mechanical feel that resonates with purists.

Performance-wise, the stock SR204128 produces approximately **160 170 horsepower** and **140 150 lb-ft of torque**, figures that may seem modest by modern standards but were groundbreaking in the late '80s and early '90s. What truly sets this engine apart, however, is its **natural aspirated potential**. With the right modifications such as **high-flow intake manifolds, upgraded camshafts, ported cylinder heads, and a high-performance exhaust system** the SR204128 can easily surpass **250 horsepower** without resorting to forced induction. Its **high-revving nature** (a redline of **7,000 7,500 RPM** is common in tuned applications) and **strong mid-range torque** make it a favorite among tuners, whether in stock form, as a **swapped engine** in a variety of platforms (including the **Evo, MR2, or even modern builds**), or as a **high-performance street/race engine**.

Beyond its mechanical prowess, the SR204128 holds a **cultural significance** that transcends its technical specifications. It was the heart of Mitsubishi s legendary **Lancer Evolution** series, a car that dominated rally circuits and street racing alike. The engine s **compact size, lightweight construction, and adaptability** have made it a staple in **JDM (Japanese Domestic Market) tuning culture**, where it is often paired with **sequential manual transmissions, limited-slip differentials, and lightweight chassis modifications** for a perfect blend of drivability and performance. Whether in its stock guise, a **fully built street engine**, or as a **race-only powerplant**, the SR204128 remains a symbol of **Japanese engineering excellence** a powerplant that continues to inspire builders, racers, and enthusiasts around the world.

For those seeking a balance of **reliability, modifiability, and historical significance**, the Mitsubishi SR204128 is an unparalleled choice. Its **timeless design**, **proven durability**, and **endless tuning potential** ensure that it remains as relevant today as it was during its prime. Whether you're a seasoned mechanic, a performance enthusiast, or simply a lover of automotive history, the SR204128 offers a **unique combination of heritage and high-performance capability** that few engines can match.

### Pros and Cons of Buying a Mitsubishi SR20 Engine (Part Number: 4128 SR204128)

#### **Pros**

1. **Reliability and Durability** The SR20 engine is widely regarded as one of the most robust and long-lasting inline-four engines ever produced. Many examples easily exceed 300,000 miles with proper maintenance, making it a favorite among tuners and enthusiasts.

2. **Tuning Potential** The SR20 is one of the most tunable engines in the world. It responds exceptionally well to forced induction (turbocharging or supercharging) and naturally aspirated modifications, allowing for significant power gains with proper support (upgrades to fuel system, cooling, and internals).

3. **Aftermarket Support** Due to its popularity, there is an extensive aftermarket for parts, including performance upgrades, rebuild kits, and supporting components. This makes maintenance and modifications more accessible and cost-effective.

4. **Cost-Effective for Performance** Compared to modern engines, the SR20 is relatively inexpensive to purchase, rebuild, or modify. This makes it an attractive option for those looking to build a high-performance vehicle without breaking the bank.

5. **Proven Track Record** The SR20 has been used in motorsports (including rallying and drifting) for decades, proving its ability to handle high stress and abuse. Many examples have been rebuilt multiple times and still perform reliably.

6. **Simplicity** The design is relatively straightforward compared to modern multi-valve engines, making diagnostics and repairs easier for those with mechanical knowledge.

7. **Resale Value in Tuning Community** While not as valuable in the general market, SR20 engines retain strong resale value within the tuning and performance car community, especially in well-maintained or modified states.

---

#### **Cons**

1. **Oil Consumption** Many SR20 engines, especially older or high-mileage examples, suffer from oil consumption due to worn piston rings or valve seals. This can lead to frequent oil top-ups or more serious issues if neglected.

2. **Timing Chain Wear** The SR20 uses a timing chain (not a belt), which can stretch or break over time, leading to catastrophic engine failure if it snaps. Regular inspection and replacement (typically every 100,000 150,000 miles) are recommended.

3. **Head Gasket Issues** Some SR20 engines, particularly those with high mileage or poor maintenance history, are prone to head gasket failure. This can cause overheating, coolant leaks, or even catastrophic engine damage.

4. **Water Pump Failure** The water pump on the SR20 is often a weak point, especially in older engines. Failure can lead to overheating and potential engine damage if not addressed promptly.

5. **Throttle Body and Intake Issues** Early SR20 engines (pre-1995) had plastic throttle bodies that could degrade over time, leading to rough idling or stalling. Upgrading to a metal throttle body or electronic throttle control (ETC) is common.

6. **Fuel System Limitations** While the SR20 can handle forced induction, the stock fuel system (fuel pump, injectors, and fuel rail) may struggle under heavy boost or high-power scenarios. Upgrades are often necessary for reliable performance.

7. **Emissions Compliance** Modern vehicles require emissions systems (catalytic converters, OBD-II, etc.), which can be problematic if modifying an older SR20 engine. Retrofitting or using aftermarket emissions solutions may be needed.

8. **Rust and Corrosion** Depending on the vehicle s history, the SR20 may be susceptible to rust, especially in the oil pan, valve cover, and exhaust manifold areas. A thorough inspection is essential before purchase.

9. **Limited Stock Availability** While the engine itself is common, finding a complete, reliable unit (especially with a clean history) can be challenging. Many used engines have unknown maintenance records.

10. **Modern Vehicle Integration Challenges** If installing the SR20 into a newer vehicle, compatibility issues (ECU mapping, wiring, emissions, etc.) may arise, requiring additional work or aftermarket solutions.

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### **Conclusion**

The Mitsubishi SR20 engine (4128 SR204128) is a legendary powerplant with unmatched reliability, tuning potential, and a dedicated community. Its strengths lie in its durability, modifiability, and cost-effectiveness, making it ideal for enthusiasts who prioritize performance and longevity. However, it is not without its weaknesses, particularly oil consumption, timing chain wear, and potential head gasket or water pump issues.

For the right buyer someone with mechanical knowledge, access to aftermarket support, and a willingness to address common wear points the SR20 remains one of the best engines to own. For those seeking a plug-and-play solution or a vehicle with minimal maintenance concerns, modern engines may be a better fit.

---

### **Recommendation**

- **Buy if:** You are an enthusiast with mechanical experience, plan to modify the engine, and are willing to invest time in maintenance (oil changes, timing chain inspection, head gasket checks). The SR20 is perfect for building a high-performance project car, drifting, or track use.

- **Avoid if:** You want a hassle-free, low-maintenance engine or are not comfortable with common SR20 issues (oil consumption, timing chain, head gaskets). In that case, consider a more modern or simpler engine like a Toyota 2JZ, Honda B-series, or a well-maintained turbocharged inline-four from a contemporary manufacturer.

- Street tuning (naturally aspirated or turbocharged)

- Drifting or time attack

- Reliable project car with high power potential

- Vintage or classic car restoration with performance goals

1. Inspect the engine for oil leaks, rust, and timing chain condition.

2. Verify maintenance history (oil changes, head gasket replacements, water pump service).

3. Test for oil consumption by checking oil levels after a drive.

4. Consider a rebuild if the engine has high mileage or unknown history.

5. Ensure compatibility with your vehicle s electrical and emissions systems if modifying.

If you proceed with caution and address the engine s common weak points, the SR20 will reward you with decades of reliable performance.

Details:

Sells new and surplus product develops channels to purchase such. Call to use a shipping service other than the ones listed. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. All products are guaranteed to be working but may show signs of use if purchasing a used product.

part #: sr204128 prices

• $180.00-$395.99

specifications sensoindustria:

• brand: Mitsubishi
• mpn: Sr-20-4128
• part type: Module

payments sensoindustria:

• credit card: Visa
• other
• wallet: Apple-pay

shipping sensoindustria:

• service: Standard
• cost: $12.90
• class: Standard
• transit: 22-34 Days
• type: Fixed

seller sensoindustria:

• rating: 99.6%
• city: 1 Millennium Dr, Willingboro, NJ 08046
• # reviews: 197972

offer sensoindustria:

• started: April 5, 2026
• sold: 0
• availability: In Stock
• options: Ship-to-home
• quantity: 1

returns sensoindustria:

• policy: Returns Accepted
• time: 30 Days
• paid by: Buyer
• method: Money back

general sensoindustria:

• PLCs HMIs > PLC Peripheral Modules > PLC Input Output Modules
• condition: Used

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