fits model: X3, F25, X4, F26, X5, F15. make: Bmw. year: 2015–2021.

( Manufacturer Part Number: 925-1673 ), ( Type: Mirror Glass ), ( Material: Plastic ), ( Universal Fitment: No ), ( Placement On Vehicle: Left, Front )
The **BMW 925-1673 15-21 X3 (F25), X4 (G01), X5 (F15), and LH Driver View Mirror Glass Dim** is a precision-engineered replacement part designed to seamlessly integrate with BMW s latest luxury crossover and SUV models, ensuring both functionality and aesthetic continuity. This high-quality, factory-spec mirror glass is crafted from durable, tempered polycarbonate, engineered to withstand environmental stressors such as UV exposure, temperature fluctuations, and mechanical stress while maintaining optical clarity. The dimming feature is integrated via an advanced electrochromic coating, allowing for seamless adjustment between fully transparent and fully tinted states with a single press of the vehicle s mirror control button, enhancing driver visibility during low-light conditions without compromising passenger privacy. The glass is meticulously calibrated to match the original equipment manufacturer (OEM) specifications, including precise curvature and alignment, ensuring a perfect fit with the mirror s housing and wiring harness. Compatible with BMW s **iDrive** and **NBT** infotainment systems, this mirror glass is designed to work harmoniously with the vehicle s electrical and sensor systems, including adaptive headlight controls and blind-spot monitoring, if equipped. Whether installed on the **X3 (F25)**, **X4 (G01)**, **X5 (F15)**, or the **LH series** (likely referring to the **Lands Rover Defender** or another luxury SUV with BMW s **G01** platform), this part upholds BMW s signature blend of performance and sophistication, delivering a flawless upgrade or replacement that restores both form and function to the vehicle s exterior. Built to meet or exceed OEM standards, it is an ideal solution for owners seeking a reliable, long-lasting component that enhances both the driving experience and the vehicle s resale value.
### **Pros and Cons of Buying a BMW with the Specifications Mentioned**
#### **Overview of the Specifications**
The vehicle in question appears to be a **2015 2021 BMW model lineup** with the following key features:- **Mirror glass dimming** (driver-side view mirror)
- **X3 (F25), X4 (F26), X5 (F15), and LH (likely a sedan, possibly the 5 Series G01)**
- **Engine code 1673** (likely a **3.0L TwinPower Turbo inline-6, N63B30M0**, common in these models)
This engine is known for its performance but has had reliability concerns in some cases. Below is a detailed breakdown of the pros and cons of purchasing such a vehicle.
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### **Pros**
1. **Strong Performance and Driving Dynamics**
- The **N63B30M0 engine** (3.0L twin-turbo inline-6) delivers **300 350 horsepower** depending on the model, providing a **sporty and engaging driving experience**.
- The **xDrive all-wheel-drive system** (standard in X-drive models) improves traction in various conditions.
- **Precision steering, responsive suspension, and BMW s characteristic handling** make these models enjoyable to drive, especially in the X3/X5/X4 lineup.
2. **Luxury and Comfort**
- BMW s **premium interior materials** (leather, aluminum trim, ambient lighting) provide a high-end feel.
- **Spacious cabins**, especially in the **X5 (F15) and X3/X4 (F25/F26)**, with **comfortable seating** for long drives.
- **Quiet cabin** (well-insulated) and **adjustable seats** contribute to a refined experience.
3. **Technology and Features**
- **Dimming driver-side mirror** (as mentioned) is a **convenience feature** for night driving.
- **Modern infotainment systems** (iDrive 7 or 8, depending on the year) with **Apple CarPlay/Android Auto** (in later models).
- **Available advanced safety tech** (adaptive cruise control, blind-spot monitoring, lane-keeping assist in newer trims).
- **Heated/ventilated seats, panoramic sunroof, and premium audio** (Bowers & Wilkins or Harman Kardon) enhance comfort.
4. **Resale Value (Compared to Competitors)**
- BMWs in this segment **retain value reasonably well**, especially **X5 (F15) and X3/X4 (F25/F26)**.
- The **LH sedan (likely the 5 Series G01)** is a **more premium alternative** to the 4 Series, with better long-term value.
5. **Reliability Improvements in Later Years**
- **2017 models** saw **engine updates** (N63B30M0 with revised turbochargers and fuel systems) that **reduced some reliability issues** from the early 2010s.
- **Transmission improvements** (especially in **ZF 8-speed automatics**) made shifting smoother and more durable.
6. **Aftermarket and Customization Options**
- BMW s **popularity in tuning** means **aftermarket support** is strong (performance parts, aesthetics, tech upgrades).
- **Easier to modify** than some luxury competitors (e.g., Mercedes, Audi) due to **open architecture and available OEM parts**.
7. **Safety Ratings**
- **IIHS Top Safety Pick (X5 F15, X3 F25)** and **Euro NCAP high ratings** ensure strong crash protection.
- **Stability control, multiple airbags, and reinforced structures** make these models **safer than many alternatives**.
---
### **Cons**
1. **Engine Reliability Concerns (N63B30M0)**
- **Early 2015 2016 models** had **oil consumption issues, turbo failures, and fuel pump failures** due to **design flaws in the N63 engine**.
- **Later models (2017 )** improved, but **some issues persist**, particularly with:- **Oil leaks** (valve cover gasket, oil filter housing gasket)
- **Turbocharger failures** (common in high-mileage examples)
- **Fuel pump and injector problems** (leading to rough idling or stalling)
- **Costly repairs** if these issues arise (turbo replacement can cost **$2,000 $4,000**).
2. **High Maintenance and Repair Costs**
- BMWs are **notoriously expensive to maintain**, with **labor costs being a major factor**.
- **Oil changes, timing belt replacements (if applicable), and turbo work** add up quickly.
- **Dealer dependency** Many repairs require **BMW specialists**, increasing costs.
3. **Electrical Gremlins**
- **iDrive system glitches** (freezing, unresponsiveness) are a **common complaint**.
- **Sensor failures** (parking sensors, rain sensors, headlight controls) can be frustrating.
- **Software updates** are sometimes required to fix minor issues.
4. **Fuel Economy is Average**
- The **N63 engine is thirsty** ( 12 15 MPG city, 16 18 MPG highway in an X5).
- **Diesel alternatives (N57) were more efficient** but had their own reliability issues.
- **Hybrid options (like the X5 xDrive40e) are better for fuel savings** but cost more upfront.
5. **Depreciation**
- While BMWs **hold value better than some competitors**, they **still depreciate significantly** ( 50% over 5 years).
- **Luxury market saturation** means **trade-in values drop faster** than in the past.
6. **Comfort vs. Sportiness Trade-Off**
- **X5 (F15) and X3/X4 (F25/F26) are more comfortable** but **less agile** than a **5 Series sedan (G01)**.
- **Ride quality can feel soft** compared to competitors like **Audi Q5 or Mercedes GLE**, which may appeal to those who prefer a firmer ride.
7. **Noise, Vibration, and Harshness (NVH) Issues**
- **Wind noise** (especially in X3/X4) can be **noticeable at highway speeds**.
- **Road noise** is **louder than in some rivals** (e.g., Audi Q5, Lexus RX).
- **Transmission whine** (in some ZF 8-speed automatics) is a **common complaint**.
8. **Parts Availability and Lead Times**
- **Aftermarket parts can be inconsistent** in quality.
- **OEM parts sometimes have long lead times**, delaying repairs.
---
### **Year-Specific Considerations**
**Year** **Key Notes**
---------- --------------
**2015 2016** Highest risk of **N63 engine failures** (turbo, fuel pump). **Avoid unless well-maintained.**
**2017 2018** **Engine updates improved reliability**, but **some issues linger**. **Better choice if budget allows.**
**2019 2021** **Most reliable in this range** (fewer early N63 problems). **Best value if found with full service history.**
---
### **Which Model is Best in This Lineup?**
1. **Best Overall Pick: BMW X5 (F15) 2017 **
- **Balances luxury, space, and reliability** better than X3/X4.
- **More premium feel** than X3/X4.
- **Easier to find well-maintained examples**.
2. **Best for Sporty Handling: BMW 5 Series (G01) LH**
- **More engaging to drive** than X5.
- **Better fuel economy** than X-drive models.
- **More refined interior** than F10/F11 sedans.
3. **Best for Space & Practicality: BMW X3 (F25) 2017 **
- **More compact than X5** but **still spacious**.
- **Better handling** than X5 (more SUV-like agility).
- **Lower running costs** than X5 in some cases.
4. **Avoid Unless Necessary: 2015 2016 Models**
- **High risk of engine issues** unless **full service records are provided**.
- **Consider a 2017 instead** if possible.
---
### **Final Recommendation**
#### **Buy If:**You **prioritize performance and driving enjoyment** over fuel efficiency.
You **find a well-maintained 2017 model** with **full service history** (especially for the N63 engine).
You **plan to keep it for at least 5 7 years** (to offset depreciation).
Fitment / Compatibility. Heated non-dimming mirror only Confirm fitment before purchase Match backing plate and connector style. Mirror glass is used and may show light scratches, haze, water spots, or slight edge darkening from normal use.These are common on mirror do not affect fitment function.See photos for exact condition. All parts are photographed and documented before shipping.Contact me first with any issues.
Ships carefully packed. Buyer Protection Notice. Brand: BMW OEM Type: Door mirror glass Placement: Left driver side Features: Heated Part Number: 925-1673Shipped from: USA. Does NOT have auto dim.
2011 2017 BMW X3 F25 2015 2018 X4 F26 2014 X5 F15 Some G01 with matching mirror. OEM BMW mirror glass.