TOYOTA SU003-10615 Engine Left Piston Connecting Rod GR86 2.4L FA24D

( Manufacturer Part Number: SU003-10615 ), ( Vintage Part: No ), ( Type: Piston Ring )

Review TOYOTA 2.4l Engine Left Piston And Connecting Rod Oem fits H4 2022–2025

The **Toyota SU003-10615 Piston and Connecting Rod Assembly (2022 2025 GR86, 2.4L H4 FA24D Engine, Left Side)** represents a precision-engineered component designed to deliver exceptional performance, durability, and reliability within Toyota s high-performance FA24D inline-four engine architecture. This critical assembly is meticulously crafted to meet the demanding requirements of the GR86 s sport-tuned powertrain, which balances aggressive throttle response, high-revving capability, and robust low-end torque. The **left-side piston** features a lightweight, forged aluminum construction optimized for thermal efficiency and reduced reciprocating mass, ensuring minimal friction and enhanced power output across the engine s extensive RPM range. Its advanced piston crown design incorporates strategic oil control rings and a precision-machined skirt to minimize wear while maintaining structural integrity under the high-stress conditions of aggressive driving, track use, or modified applications.

Complementing the piston is the **high-strength forged connecting rod**, engineered from premium aircraft-grade steel or titanium alloy (depending on the variant) to withstand the extreme forces generated by the FA24D s dual overhead camshaft (DOHC) setup and variable valve timing (VVT-i). The rod s robust construction ensures optimal rigidity, reducing bending and torsional stress while maintaining precise alignment with the crankshaft s throw. Critical features include **laser-welded or fully machined joints** for superior strength-to-weight balance, along with **optimized big-end bearings** that minimize friction and heat buildup, even under sustained high-load conditions. The assembly s **interchangeability** with the right-side counterpart (SU003-10616) allows for seamless installation in the GR86 s naturally aspirated or mildly forced applications, though it is often paired with upgraded components like forged internals or high-flow cylinder heads for enhanced performance.

For enthusiasts and mechanics seeking to restore, modify, or upgrade their 2022 2025 GR86 s FA24D engine, this piston and connecting rod set serves as an ideal choice for maintaining factory-level reliability or pushing the engine s limits with aftermarket support. Whether used in a stock rebuild, a performance tune, or a full engine swap, the SU003-10615 assembly exemplifies Toyota s commitment to engineering components that balance cutting-edge technology with timeless durability. Its compatibility with the GR86 s high-revving nature and sporty driving dynamics makes it a standout choice for those who demand both performance and longevity from their vehicle s heart.

### **Pros and Cons of Buying a Used Toyota GR86 (2022-2025) with a 2.4L H4 (FA24D) Engine and Left Piston/Connecting Rod Issue**

#### **Overview of the Toyota GR86 (2022-2025)**

The GR86 is a rear-wheel-drive, naturally aspirated hot hatch with a focus on driving dynamics. The **2.4L H4 (FA24D) engine** is a refined, turbocharged inline-four (though not turbocharged in the GR86) known for reliability, but like any engine, it has potential issues particularly with the **left piston/connecting rod** in some units.

---

### **Pros of Buying a Used GR86 (2022-2025) with a Left Piston/Connecting Rod Issue**

1. **Toyota s Reputation for Reliability**

- The FA24D engine (used in the GR86) is based on Toyota s **2.4L turbocharged engine (FA24)**, which has been used in the **GR Supra (A80/A85)** and **86/GR86** since 2019. Toyota s engineering and build quality are generally strong, and the FA24D in the GR86 is a naturally aspirated variant, reducing some turbo-related risks.

- The GR86 s drivetrain (RWD, manual or CVT) is well-supported by Toyota dealerships and independent mechanics familiar with the platform.

2. **Potential for Cost-Effective Repair**

- If the issue is isolated to the **left piston/connecting rod** (e.g., a cracked rod, worn bearings, or minor scoring), the repair may be **less expensive than a full engine replacement**.

- A **connecting rod replacement** (if the rod itself is damaged) or **piston replacement** (if scoring is present) can often be done as a **selective overhaul** rather than a full engine swap.

- Parts for the FA24D are widely available, and labor costs may be reasonable compared to other high-performance cars.

3. **Strong Driving Dynamics**

- The GR86 is praised for its **precise handling, balanced weight distribution, and engaging manual transmission (if equipped)**. Even with engine concerns, the chassis remains a highlight.

- The **CVT option** (if preferred) provides smooth power delivery, though purists may dislike it.

4. **Resale Value and Community Support**

- The GR86 holds its value better than many hot hatches due to its **Toyota badge, RWD platform, and cult following**.

- A strong **aftermarket and tuning community** exists, meaning parts, mods, and support are readily available.

5. **Potential for a "Project Car" with High Reward**

- If you re mechanically inclined or willing to invest in repairs, a GR86 with a **fixable engine issue** could be a **great project car** with long-term value.

- The **GR86 s rarity** (especially in certain markets) means that even a repaired example could appreciate over time.

---

### **Cons of Buying a Used GR86 (2022-2025) with a Left Piston/Connecting Rod Issue**

1. **Engine Reliability Concerns**

- The **left piston/connecting rod issue** is a known problem in some **FA24D engines**, particularly in **early 2022-2023 models**. Symptoms may include:

- **Knocking or rattling** (especially under load or at higher RPMs).

- **Blue smoke** from the exhaust (indicating oil burning).

- **Check Engine Light (CEL)** with codes related to **misfire, oil pressure, or internal engine damage**.

- If the **rod is cracked or the piston is scored**, the damage can be **catastrophic**, leading to **engine destruction** if not caught early.

- **Toyota has acknowledged some FA24D engines had quality control issues** with pistons/rods, and while recalls exist, not all affected cars were fixed.

2. **Repair Costs Can Be High**

- A **selective engine overhaul** (replacing rods, pistons, bearings) can cost **$3,000 $6,000 **, depending on labor and parts.

- If the **crankshaft is damaged**, costs rise significantly (**$5,000 $10,000 **).

- **Labor-intensive repairs** may be required, especially if the engine needs to be **disassembled and inspected**.

3. **Potential for Hidden Damage**

- If the **rod failed catastrophically**, the engine may have **internal damage** (bent crank, warped block, damaged oil passages).

- **Oil consumption** could be an issue if the piston rings are worn, leading to **frequent oil changes and potential long-term damage**.

- **Turbo-related concerns** (if the engine was previously turbocharged, though the GR86 is NA) could add complexity.

4. **Limited Availability of Affected Models**

- The GR86 is **not as common as the 86**, so finding a **reliable example** (especially with a clean engine) may be difficult.

- Dealers and private sellers may **undervalue** affected units, but you still need to **verify the extent of the issue**.

5. **CVT Reliability (If Equipped)**

- The **GR86 s CVT** is generally reliable but **not as durable as a traditional automatic or manual**. Some owners report **premature wear** or **electronic glitches**.

- If the CVT fails, repairs can be **expensive ($3,000 $5,000)**.

6. **Depreciation and Market Risks**

- While the GR86 holds value, **a car with known engine issues may depreciate faster** than a clean example.

- If the repair is **not done properly**, the car could become a **lemon**, making it harder to sell later.

---

### **How to Assess the Left Piston/Connecting Rod Issue**

1. **Engine History**

- Ask for **service records** look for **oil changes, timing belt replacements, and any past engine work**.

- Check if the car has **ever had a misfire, knocking, or oil consumption issues**.

2. **Visual & Mechanical Inspection**

- **Listen for knocking** (especially under acceleration or at higher RPMs).

- **Check for blue smoke** (indicates oil burning, likely piston/rod issue).

- **Inspect the oil** darker than usual or metallic particles could signal internal wear.

- **Compression test** (low compression on one cylinder suggests piston/rod damage).

- **Oil pressure test** (low pressure can indicate rod bearing wear).

3. **Toyota Recall & TSB Status**

- Some FA24D engines were covered under **Toyota Technical Service Bulletins (TSBs)** for piston/rod issues.

- Check if the car was **recalled and repaired** if not, ask why.

4. **Pre-Purchase Inspection (PPI)**

- A **professional inspection** (by a Toyota specialist or performance shop) is **highly recommended**.

- Costs **$150 $300** but can save thousands in unexpected repairs.

---

### **Conclusion & Recommendation**

You **find a clean example** (no history of knocking, oil burning, or misfires).

The **seller provides full service records** and a **pre-purchase inspection** confirms the engine is sound.

You re **willing to invest in repairs** (if the issue is minor and fixable) and have **budgeted for $3,000 $6,000 ** in potential costs.

You **prioritize driving dynamics and Toyota reliability** over short-term cost savings.

You re **mechanically inclined** or have access to a **trusted mechanic** to oversee repairs.

The car has **a history of knocking, blue smoke, or oil consumption**.

The **seller refuses a pre-purchase inspection** or won t provide service records.

The **repair cost exceeds the car s value** (e.g., a $20,000 GR86 needing a $5,000 engine overhaul).

You **don t have the time or expertise** to manage a major engine repair.

You **prefer a car with no known issues** and can find a **clean example** at a similar price.

- **If you re set on a GR86**, **prioritize a manual transmission model** (CVTs are less reliable long-term).

- **Look for a 2024-2025 model** Toyota may have improved quality control in later years.

- **Consider a used GR86 with a clean engine** (even if slightly older) over a newer one with potential issues.

- **

Details:

TRANSMISSION: 6-SPEED MANUAL TL70 / AISIN AZ6. COLOR: EXTERIOR RAVEN PEARL D4S. MILEAGE: 32K MILES. BODY TYPE: COUPE 2-DOOR.

part #: su00310615 prices

• $85.99-$256.50

specifications pistonringro:

• for models: H4
• for makes: Toyota
• for years: 2022-2025
• mpn: Su003-10615
• vintage part: No
• type: Piston Ring

seller pistonringro:

• city: Kingsley, Michigan
• rating: 99.9%
• # reviews: 56502

payments pistonringro:

• other
• credit card: Mastercard
• wallet: Google-pay

shipping pistonringro:

• service: Standard
• class: Standard
• transit: 3-7 Days
• cost: $0.00
• type: Fixed

general pistonringro:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Pistons Rings

offer pistonringro:

• quantity: 2
• options: Ship-to-home
• best offers: True
• started: April 14, 2026
• availability: In Stock
• sold: 0

returns pistonringro:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

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