ACURA 78100TZ3A21 Speedometer Gauge Mph Advance 3.5L

( Manufacturer Part Number: 78100TZ3A21 ), ( Core Charge: 1.00 Which Is Included In The Total Price ), ( Genuine Oem: Yes ), ( Interchange Item Code: 257 ), ( Color: White ), ( Reference Oe/oem: 78100tz3a21, 78100tz3a22, 78100tz3a23, 78100tz3a24 ), ( Warranty: 90 Days ), ( Type: Speedometer Gauge )

Review ACURA Used Speedometer Gauge Mph Us Market 3.5l Advance Grade fits TLX FWD 2015

The **Acura TLX 2015 3.5L FWD Speedometer Gauge (Part #: 78100-TZ3-A21)** is a precision-engineered instrument cluster designed exclusively for the advanced and refined driving experience of the second-generation TLX lineup. This high-performance gauge assembly integrates seamlessly into the sleek, digital-dash interface of the 2015 TLX, delivering real-time vehicle data with clarity and sophistication. Crafted from durable, high-quality materials, the gauge features a **123mm analog display** with a **white-on-black face**, ensuring optimal visibility under varying lighting conditions whether cruising on a sunlit highway or navigating low-light urban streets. The speedometer itself is calibrated for accuracy, providing precise readings in both **miles per hour (mph)** and **kilometers per hour (km/h)**, catering to drivers who may travel internationally. Beyond speed, the gauge incorporates a **tachometer** for monitoring engine RPM, a **fuel gauge** with a digital readout for fuel level, and a **temperature gauge** to track engine coolant temperature, all presented in a clean, minimalist layout that enhances the TLX s premium aesthetic. The **3.5L V6 FWD model** benefits from this gauge s integration with the vehicle s advanced powertrain, offering drivers confidence in performance while maintaining a balance of efficiency and power. Whether accelerating smoothly through city traffic or maintaining steady highway speeds, this gauge ensures that every drive is informed and enjoyable. Built to Acura s rigorous standards, it is designed for long-term reliability, complementing the durability of the TLX s FWD drivetrain and contributing to the overall driving experience that defines Acura s commitment to innovation and luxury.

Buying a used **2015 Acura TLX 3.5L FWD (VIN: 78100TZ3A21)** with the **speedometer gauge** (likely referring to the instrument cluster or a specific gauge issue) involves weighing several factors. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Reliability and Build Quality**

The 2015 Acura TLX is based on Honda s **Jazz (Fit) platform**, which is known for solid construction, good resale value, and durability. The **3.5L V6 engine** (a Honda J35 engine) is a well-regarded powertrain with decent longevity if maintained properly. It s a smooth, fuel-efficient (for a V6) engine with good torque, making it suitable for highway driving and light towing (up to 1,500 lbs with the FWD model).

2. **Comfort and Practicality**

The TLX offers a **spacious interior** with premium materials (depending on trim), a quiet cabin, and a comfortable ride. The **7-speed dual-clutch transmission (DCT)** is smooth and efficient, though some drivers prefer a traditional automatic. The **FWD layout** means lower maintenance costs compared to AWD models and better fuel economy ( 20 city / 28 highway MPG).

3. **Safety Features**

The 2015 TLX comes standard with **Honda Sensing** (adaptive cruise control, collision mitigation, lane-keeping assist), which is a strong safety suite for the year. It also includes **stability control, multiple airbags, and a good crash-test rating**.

4. **Resale Value**

Acura holds its value relatively well, and the TLX is no exception. Even after 8 years, it retains decent equity, especially compared to some luxury brands.

5. **Low Maintenance Costs (Compared to Luxury Brands)**

While not a luxury car, the TLX avoids the high repair costs of brands like BMW or Mercedes. Honda/Acura dealerships and independent mechanics are familiar with the platform, making repairs more accessible.

6. **Tech and Infotainment**

The **7-inch touchscreen (with optional navigation)** and **Bluetooth connectivity** are functional, though not cutting-edge by today s standards. The **Apple CarPlay and Android Auto** (available in later models) are absent, which may be a drawback for some buyers.

7. **Fuel Efficiency**

For a V6, the **3.5L engine is surprisingly efficient**, especially in FWD form. It s better than many smaller 4-cylinder engines in terms of power delivery and towing capability.

---

### **Cons**

1. **Transmission Issues (DCT Problems)**

The **7-speed dual-clutch transmission (DCT)** in the TLX has a **notorious reputation for reliability issues**, particularly in early models (2014 2016). Common problems include:

- **Rough shifting or hesitation** (especially under load).

- **Transmission slipping or jerking**.

- **Electrical gremlins** (e.g., clutch pack failures, solenoid issues).

- **Premature wear** (some owners report failures around 60,000 100,000 miles).

- **High repair costs** (rebuilding or replacing the transmission can cost **$3,500 $5,000**).

- **Service bulletins** (Honda issued recalls and extended warranties for some DCT models, but not all were covered).

- **Service history is critical** if the transmission has been serviced by Honda or a trusted shop, it may be fine, but **always get a pre-purchase inspection (PPI) with a transmission test drive**.

*If the transmission has been neglected, this could be a major red flag.*

2. **Speedometer/Gauge Cluster Concerns**

The mention of the **"speedometer gauge"** suggests there may be an issue with the **instrument cluster** (e.g., dead pixels, flickering, or a faulty gauge). Common problems include:

- **Backlit display failures** (common in older Acuras/Hondas).

- **Electrical gremlins** (wiring issues, fuse problems).

- **Water damage** (if the car has been in a flood or driven in heavy rain).

- **Software glitches** (some clusters need a reset).

- **Replacement cost** ( $300 $600 for a new cluster, labor included).

*If the gauge is non-functional or erratic, this is a minor but annoying issue that could escalate if ignored.*

3. **Rust (Especially in Snow Belt Areas)**

The TLX is prone to **rust in the wheel wells, rocker panels, and undercarriage**, particularly in regions with salted roads. A thorough inspection of these areas is **mandatory**.

4. **Infotainment Limitations**

The **7-inch screen lacks modern features** like wireless CarPlay/Android Auto, Apple Watch integration, or a premium audio system. Upgrading the stereo would require aftermarket work.

5. **Towing Limitations (FWD Model)**

While the FWD TLX can tow up to **1,500 lbs**, it lacks the **towing package** (which includes a trailer brake controller and cooling upgrades). If you plan to tow, this could be a dealbreaker.

6. **Depreciation**

The TLX has **depreciated significantly** since 2015. While it s a solid car, you re paying a premium for an older model with potential transmission risks.

7. **Recall History**

- **Transmission issues** (e.g., delayed engagement).

- **Airbag deployment problems**.

- **Electrical system faults**.

8. **Resale Market Saturation**

The TLX is a **common used car**, meaning there s **plenty of competition** in the market. You may need to negotiate hard or pay close attention to condition.

---

### **Critical Considerations Before Buying**

1. **Transmission History is Non-Negotiable**

- **Get a pre-purchase inspection (PPI) with a transmission specialist.**

- **Request service records** showing **transmission fluid changes** (should be done every **30,000 60,000 miles**).

- **Test drive the car** listen for **unusual noises, hesitation, or rough shifts**.

- **Check for Honda extended warranty coverage** (if applicable).

2. **Rust Inspection**

- Look for **corrosion in wheel wells, rocker panels, and under the car**.

- **Undercoating** should be intact; missing coating indicates rust risk.

3. **Electrical System Check**

- Test all **gauges, lights, and electronics** (not just the speedometer).

- Ensure **no flickering or error codes** on the dashboard.

4. **Engine and Drivetrain**

- Listen for **knocking, ticking, or unusual noises** (the 3.5L V6 is generally reliable but can develop **valve train issues** if neglected).

- Check for **oil leaks** (valve cover gasket, oil pan, or rear main seal).

5. **Suspension and Brakes**

- **Struts and shocks** may need replacement ( $500 $1,000 for a full set).

- **Brake pads and rotors** should be inspected (expect to replace them within the next **20,000 40,000 miles**).

6. **Price Negotiation**

- **Fair market value** for a **2015 TLX with 100,000 miles** (depending on condition) is **$12,000 $16,000**.

- If the seller is asking **above $18,000**, be wary unless it s a **low-mileage, well-documented example with a clean transmission**.

---

### **Conclusion**

The **2015 Acura TLX 3.5L FWD** is a **solid, comfortable, and practical** car with a **reliable engine** and **good safety features**. However, its **transmission is the biggest weakness**, and if not properly maintained, it can become a **major expense**. The **speedometer/gauge issue** is a minor annoyance but should be addressed before purchase.

The **transmission has been well-maintained** (fluid changes, no rough shifting).

The **seller provides full service records**.

You **pass a thorough pre-purchase inspection** (including a transmission test drive).

You **budget for potential future repairs** (struts, brakes, possible transmission work).

The **transmission has a questionable history** (no service records, rough shifting, hesitation).

The **seller refuses a PPI or test drive**.

There is **visible rust or neglect** in the vehicle.

The **price is inflated** without justification.

---

###

Details:

This part fits vehicles made in the following years 2015, 2016 ,2017,2018,2019. Every part is cleaned, tested and inspected by experts. Original parts mean a perfect fit. Unless specified as Universal this is a direct fit Speedometer Gauge.

All parts are covered by warranty. Parts go back into cars rather than landfill.

part #: 78100tz3a21 prices

• $55.00-$156.88

specifications boosttempgauges:

• for models: Tlx, Fwd
• for makes: Acura
• for years: 2015
• mpn: 78100tz3a21
• core charge: 1.00 Which Is Included In The Total Price
• genuine oem: Yes
• interchange item code: 257
• color: White
• reference oe/oem: 78100tz3a21, 78100tz3a22, 78100tz3a23, 78100tz3a24
• warranty: 90 Days
• type: Speedometer Gauge

general boosttempgauges:

• condition: Used
• Interior Parts Accessories > Gauges > Individual Gauges

shipping boosttempgauges:

• transit: 3-8 Days
• class: Expedited
• carrier: USPS
• type: Fixed
• service: USPS Priority Mail
• cost: $0.00

payments boosttempgauges:

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

seller boosttempgauges:

• # reviews: 1253
• rating: 98.8%
• city: Douglassville, Pennsylvania

offer boosttempgauges:

• quantity: 1
• sold: 0
• availability: In Stock
• started: March 24, 2026
• best offers: True
• options: Ship-to-home

returns boosttempgauges:

• time: 60 Days
• policy: Returns Accepted
• paid by: Seller

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