INFINITI A81522 Throttle Body Q45T 2B550

( Manufacturer Part Number: A81522 ), ( Items Included: Throttle Valve ), ( Material: Aluminum ), ( Vintage Part: No ), ( Fuel Type: Gasoline ), ( Type: Throttle Body ), ( Manufacturer Warranty: 1 Month ), ( Oe/oem Part Number: Oem Infiniti ), ( Connector Type: Plug ), ( Connector Quantity: Multi ), ( Country Of Origin: Japan )

Review INFINITI Oem Throttle Body Assembly 43000 fits 1996

The **Infiniti A81522 1996 Q45TE Throttle Body (Part Number: 2B550)** is a precision-engineered component designed specifically for the high-performance **Q45TE 4.5L V8 engine** found in the **1996 Infiniti M35 and G35 (early models)** as well as select **Infiniti Q45 and QX4** variants. This throttle body is a critical part of the engine s fuel delivery and airflow management system, ensuring optimal throttle response, smooth acceleration, and efficient engine performance. Crafted from high-quality materials, including durable plastic and precision-machined metal components, this throttle body features a **two-barrel design (2B)**, which distinguishes it from the single-barrel variants found in other engine configurations. The **Q45TE throttle body** incorporates a **drive-by-wire (DBW) system**, allowing for electronic throttle control (ETC) that enhances drivability, reduces emissions, and provides seamless integration with the engine s ECU (Engine Control Unit). The internal mechanism includes a **throttle plate assembly**, **accelerator pedal position sensor (APPS)**, and **throttle position sensor (TPS)**, all of which work in tandem to monitor and regulate airflow into the intake manifold based on driver input. This ensures precise throttle modulation, whether under light cruising conditions or during aggressive acceleration. For restoration or replacement purposes, this throttle body is a **direct-fit OEM replacement**, compatible with the original wiring harness and mounting points, making it an ideal choice for enthusiasts seeking to restore factory performance or upgrade their vehicle s throttle response. Whether used in a classic restoration project or as a part of a performance tune, the **1996 Infiniti A81522 Q45TE Throttle Body (2B550)** delivers the reliability and responsiveness expected from Infiniti s high-performance lineup.

### **Pros and Cons of Buying a 1996 Infiniti A81522 (Q45T) with a Throttle Body (2B550) Issue**

#### **Pros**

1. **Strong Engine and Performance**

The Q45T is a 4.5-liter V8 engine known for its reliability and power output (around 275 300 horsepower in this model). It was a well-regarded engine in its time, capable of handling daily driving and occasional spirited use.

2. **Luxury and Comfort**

The Infiniti A81522 was positioned as a luxury sedan, offering a refined interior, comfortable seating, and a smooth ride. The cabin materials (for this era) were decent, and the vehicle had a premium feel compared to many Japanese competitors.

3. **Proven Reliability (When Maintained)**

The Q45T engine is known for longevity if properly maintained. Many examples with 200,000 miles still run well, especially if the owner kept up with oil changes, timing belt replacements (if applicable), and other scheduled maintenance.

4. **Good Resale Value for a Classic Luxury Sedan**

While not a modern luxury car, the A81522 holds its value better than many Japanese sedans from the '90s due to its brand reputation and V8 engine. This makes it a practical choice for enthusiasts or collectors.

5. **Mod Potential**

The Q45T is a popular engine for tuning, with aftermarket support for intake, exhaust, and performance chips. A well-maintained example could be a fun project car or a daily driver with minor upgrades.

6. **Rare and Collectible**

The A81522 is not overly common, especially in good condition. This makes it a niche find for buyers who appreciate classic luxury sedans or Infiniti history.

7. **Decent Fuel Economy for a V8 (Compared to Alternatives)**

While not great by modern standards (around 14 16 MPG combined), it was better than many American V8s of the era and still adequate for highway driving.

---

#### **Cons**

1. **Throttle Body Issue (2B550 Code)**

- Rough idle or stalling

- Poor acceleration

- Check Engine Light (CEL) illumination

- Potential long-term damage if ignored (e.g., carbon buildup in the throttle body)

- **Fix:** The throttle body may need cleaning (ultrasonic or manual) or replacement. Parts can be expensive, and labor costs add up. If the issue is severe, it may require a full throttle body swap.

2. **Aging Transmission (If Automatic)**

The 4-speed automatic transmission (common in this model) can develop slipping, rough shifting, or internal wear over time. Fluid changes are critical, but many owners neglect this, leading to premature failure.

3. **Electrical and Sensor Issues**

- Faulty sensors (oxygen sensors, MAF sensor, etc.)

- Wiring harness problems

- Infotainment system failures (if equipped)

- **Fix:** These issues can be costly to diagnose and repair, especially if the car has been poorly maintained.

4. **Rust and Body Condition**

Many '90s Infinitis suffer from rust, particularly in the wheel wells, rocker panels, and undercarriage. A thorough inspection is essential to avoid buying a car with structural corrosion.

5. **High Maintenance Costs**

- **Oil changes:** The Q45T requires high-quality synthetic oil (e.g., 5W-30 or 5W-40) and frequent changes (every 5,000 7,500 miles) to prevent sludge buildup.

- **Timing belt:** If the car hasn t had one, this is a critical (and expensive) maintenance item. The Q45T does **not** have an interference engine, but a failed timing belt can still destroy water pumps and tensioners.

- **Suspension wear:** Bushings, shocks, and struts degrade over time, leading to a rough ride.

- **Brakes:** Rotor warping and pad wear are common in high-mileage examples.

6. **Depreciation and Modern Standards**

- The A81522 lacks modern safety features (no stability control, basic airbags, poor crash test ratings).

- Fuel efficiency is poor by today s standards.

- Reliability is not guaranteed without significant investment.

7. **Parts Availability**

While not as scarce as some older Japanese cars, parts for a 1996 Infiniti can be harder to find than for newer models. Some components (e.g., specific sensors, wiring harnesses) may require sourcing from used lots or online marketplaces.

8. **Potential Hidden Problems**

- **Coolant leaks** (water pump, hoses)

- **Exhaust leaks** (common in V8s)

- **Power steering or brake fluid leaks**

- **A/C failure** (compressor or refrigerant loss)

- A pre-purchase inspection (PPI) is **highly recommended** to avoid surprises.

---

### **Conclusion**

- **Are prepared for repairs** (especially the throttle body and potential transmission issues).

- **Have mechanical knowledge** or access to a trusted mechanic.

- **View it as a project car** rather than a plug-and-play daily driver.

- **Are willing to invest in maintenance** to keep it running smoothly.

- **Want a hassle-free, modern luxury sedan**, this car is not the right choice.

- **Cannot afford unexpected repairs**, the risks outweigh the rewards.

- **Prefer a car with better reliability and safety**, consider newer or more modern alternatives.

---

### **Recommendation**

- **Get a pre-purchase inspection (PPI)** from a trusted mechanic specializing in Infiniti or V8 engines.

- **Budget for immediate fixes** (throttle body cleaning/replacement, transmission fluid change, timing belt inspection).

- **Test drive thoroughly** listen for unusual noises, check for rough idling, and ensure the throttle response is smooth.

- **Consider a lower-mileage example** (under 100,000 miles) if available, as it will require less work upfront.

- **Look for a well-documented example** with complete service records, especially for oil changes, timing belt, and transmission fluid.

- **Avoid cars with rust, electrical issues, or a history of neglect.**

- **Be prepared for higher-than-average maintenance costs** compared to modern cars.

- **Get a quote for repair** if it s over $500 $800, weigh whether it s worth fixing.

- **Consider alternatives** (e.g., a used Nissan 300ZX, Toyota Land Cruiser, or a modern luxury sedan) if reliability is a priority.

The **1996 Infiniti A81522 Q45T is a fun, powerful car with strong potential**, but **only if you re willing to put in the work**. If you re looking for a **low-maintenance, reliable vehicle**, this is not the best choice. However, for an **enthusiast or someone who enjoys classic luxury sedans**, it can be a great project with the right approach. **Always prioritize a thorough inspection and budget for repairs before purchasing.**

Details:

Make sure to match up part numbers for proper fitment. Return shipping is paid by customer. USPS Express Shipping available Make sure your delivery address is correct before purchasing. Fitment: Q45T.

part #: a81522 prices

• $49.99-$175.00

specifications throobo:

• for makes: Infiniti
• for years: 1996
• mpn: A81522
• items included: Throttle Valve
• material: Aluminum
• vintage part: No
• fuel type: Gasoline
• type: Throttle Body
• manufacturer warranty: 1 Month
• oe/oem part number: Oem Infiniti
• connector type: Plug
• connector quantity: Multi
• country of origin: Japan

shipping throobo:

• cost: $0.00
• transit: 5-12 Days
• carrier: USPS
• type: Fixed
• service: USPS Ground Advantage, USPS Priority Mail
• class: Standard, Expedited

returns throobo:

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

seller throobo:

• # reviews: 3365
• rating: 99.3%
• city: Pinon Hills, California

general throobo:

• Car Truck Parts Accessories > Air Fuel Delivery > Throttle Bodies
• condition: Used

offer throobo:

• started: June 12, 2026
• availability: In Stock
• best offers: True
• quantity: 1
• sold: 0
• options: Ship-to-home

payments throobo:

• credit card: Diners-club
• other
• wallet: Paypal

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