BMW 2 Series F45 LCI / F46 LCI LED Headlight (LEFT), Why the 5A017B1 Genuine OEM Part is Worth It

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When it comes to BMWs, details matter. Whether you’re driving an F45 Active Tourer or an F46 Gran Tourer, one small component can change the feel, function, and even the value of your vehicle.

One of the most underrated yet essential parts?

The LED headlight.

Today, we’re taking a closer look at the BMW 2 Series F45 LCI / F46 LCI LED Headlight – LEFT side (USED, GENUINE OEM, part number: 5A017B1). Suppose you’re thinking about replacing a damaged light or upgrading to OEM quality. In that case, this post covers everything you need to know, from compatibility and performance to why OEM beats aftermarket every time.

Overview: What Is the BMW F45/F46 LCI?

Before diving into the headlight unit itself, let’s quickly cover what F45 LCI and F46 LCI stand for.

• F45 refers to the BMW 2 Series Active Tourer (5-door hatchback)

• F46 refers to the BMW 2 Series Gran Tourer (7-seater MPV)

• LCI stands for “Life Cycle Impulse”, BMW’s version of a mid-cycle facelift

The LCI versions (produced from late 2017–2021) came with updated styling, better technology, and yes, full LED headlights that gave the front end a more modern, aggressive look.

Why the Headlight Matters

You might think of headlights as basic parts, but in reality, they serve three major roles:

1. Safety – Improve visibility at night, during storms, and in low-light environments

2. Style – Define the front-end aesthetic of your BMW, especially in facelifted LCI models

3. Value – OEM lighting keeps your car compliant, attractive, and closer to resale-ready

If your left headlight is cracked, fogged, or completely out, replacing it isn’t just about looks; it’s about restoring proper performance.

OEM vs Aftermarket: Why Genuine BMW Parts Win

The market is full of cheap aftermarket headlights, but here’s the catch: they rarely match BMW’s engineering precision.

Here’s why USED GENUINE OEM parts like the 5A017B1 LED headlight are a smarter investment:

• Perfect Fit – Designed specifically for the F45/F46 LCI chassis

• Longer Lifespan – Built with higher-quality components than low-cost alternatives

• No Error Codes – Seamlessly integrates with your BMW’s CAN bus system

• Consistent Light Output – Matching brightness and color temperature to the right side headlight

• Original Look – Maintains the authentic BMW design language

Used doesn’t mean worn-out. Most OEM parts are removed from donor vehicles in excellent condition, tested for functionality, and sold at a fraction of the new price.

Product Spotlight: LEFT LED HEADLIGHT – OEM Part #5A017B1

Let’s break down the specific part we’re focusing on:

• Product: BMW 2 Series F45 LCI / F46 LCI LED Headlight (Left Side)

• Condition: Used, tested, working

• Type: Genuine OEM, not aftermarket

• BMW Part No: 5A017B1

• Fitment:

  • F45 LCI Active Tourer (2017–2021)

  • F46 LCI Gran Tourer (2017–2021)

This headlight includes:

• LED low beam and high beam

• Integrated daytime running lights (DRL)

• Factory-fit plug-and-play connectors

• OEM lens with clean housing

If your left headlight is malfunctioning, dim, or cracked, replacing it with this OEM unit restores both function and design symmetry.

Common Reasons for Replacement

Wondering if it’s time to replace your headlight?

Here are the most common issues BMW owners face:

• Condensation or fog inside the lens

• Cracked or chipped housing from minor collisions

• LED burnout or internal wiring failure

• Yellowing lens from UV damage

• Moisture-triggered electronic faults

Using a genuine replacement avoids compatibility issues and saves you from having to replace the unit again in 6 months.

Installation: What You Should Know

Installation of the BMW F45/F46 LCI headlight can typically be done by a professional in under 2 hours.

Key tips:

• Disconnect the battery before handling any wiring

• Remove the bumper cover (usually necessary for full access)

• Use proper torque when tightening headlight mount bolts

• Ensure alignment is correct to avoid glare or uneven lighting

After installation, the headlight should work immediately with no additional coding required, one of the benefits of using a genuine OEM part.

Buying Used: What to Look For

Not all “used” parts are created equal. Here’s what to check before buying:

• Lens Clarity – No deep scratches or yellowing

• Mounting Tabs – Should be intact, not cracked or repaired

• Wiring and Connectors – No corrosion or cuts

• Seal Condition – Must be airtight to prevent future condensation

• Function Test – Ideally tested before shipment

Our listed OEM unit (5A017B1) has passed all these checks, ensuring you get the quality and performance BMW intended.

Final Thoughts: Is It Worth It?

Absolutely.

The BMW 2 Series F45/F46 LCI LED Headlight – LEFT, OEM 5A017B1 is the right choice for any owner who cares about safety, style, and long-term reliability. It's a cost-effective way to restore your vehicle’s lighting system without compromising on quality or appearance.

With OEM fitment, consistent brightness, and a finish that blends perfectly with the rest of the vehicle, it’s more than just a replacement; it’s a restoration of your BMW’s full potential.

Ready to Order?

We offer:

• Carefully inspected genuine OEM parts

• Secure packaging and fast shipping

• Support for fitment questions or installation tips

Add this item to your cart now or contact us for more details. Keep your BMW at its best, down to the last detail.