FAQ

ZETA is a brand of products and parts for automotive headlight systems. It focuses on parts and solutions for repairing, restoring and improving vehicle lighting, so drivers have options for looking after their headlights that suit their needs.

ZETA offers a wide range of headlight products, including headlight lens covers, LED headlight bulbs, Bi-LED projectors, fog light projectors, headlight chip modules and light guides, serving drivers, car accessory shops and headlight repair shops.

ZETA puts quality, fit and a broad range of headlight parts first. Our headlight lens covers have a UV-protective coating and anti-haze properties, and come with a 1-year warranty, giving customers a way to repair their headlights without always having to replace the whole headlamp.

ZETA covers many parts of the headlight system: lens covers, internal headlamp parts and lighting upgrades. This lets repair shops and drivers replace only the part that is actually causing the problem, instead of always replacing the entire headlamp assembly.

ZETA selects products based on material properties, fit for each car model and performance in use. Testing standards and quality-control details may differ by product type; please contact ZETA directly for information about a specific model.

ZETA products support many makes, including Japanese and European cars, pickups, sedans and SUVs, such as Toyota, Honda, Isuzu, Ford, BMW and Mercedes-Benz. Always check the model, year and headlamp type before buying.
Read more: How to Choose the Right Headlight Parts for Your Car

You can browse products on the ZETA Thailand website and ask our staff or authorised dealers about ordering, so we can help you choose the right part for your car before you buy.

Contact ZETA to find a dealer or installer near you. Let us know your province and the type of product you need, and our staff will recommend a suitable service point.

The lens cover is the outer part of the headlamp assembly. It protects the internal components from dust, water and dirt, and it is part of the path that light travels from the bulb or projector to the road.

ZETA headlight lens covers are made of optical-grade polycarbonate (PC), which is crystal clear and impact-resistant for automotive use, with a UV-protective coating and an anti-fog coating.

ZETA lens covers stand out for their clarity, UV-protective coating and anti-haze properties. They are available for a wide range of models and come with a 1-year warranty under the stated terms.

ZETA focuses on clarity, an accurate fit to the headlamp shape and surface protection with a UV coating, and offers covers for many car models. Differences in lifespan and performance compared with other brands should, however, be judged on test data under the same conditions.

The main cause is deterioration of the surface and its UV-protective coating after long exposure to sunlight, heat, pollution and chemicals. The cover starts to yellow, cloud over or develop fine cracks (crazing), which can reduce headlight performance.
Read more: Yellow, Cloudy Headlights: Polish, Replace the Lens, or Replace the Whole Headlamp?

Yes. A yellow or cloudy cover can reduce the amount of light leaving the headlamp and scatter it differently from the original pattern, reducing night-time visibility, especially when the cover is badly deteriorated.
Read more: Yellow, Cloudy Headlights: Polish, Replace the Lens, or Replace the Whole Headlamp?

Yes. ZETA lens covers have a UV-protective coating that helps slow surface deterioration from sunlight. Actual lifespan still depends on the environment, usage and care.

ZETA lens covers have a surface coating that helps reduce hazing, according to the product specifications. Note the difference between haze on the surface and condensation from moisture inside the headlamp: condensation depends on the headlamp's sealing and ventilation.
Read more: Foggy Headlights and Condensation Inside the Lamp: Causes and Fixes

All lens covers can deteriorate over time and with use. ZETA's UV coating helps slow the effects of sunlight, but it cannot guarantee that a cover will never yellow over its entire life.

Polishing restores the surface of the existing cover and suits cases where the damage is still minor. Replacement removes the old cover and fits a new one, and suits covers that are badly deteriorated, deeply clouded, crazed or damaged beyond what polishing can fix.
Read more: Yellow, Cloudy Headlights: Polish, Replace the Lens, or Replace the Whole Headlamp?

Consider replacing it when the cover is severely yellowed or cloudy, crazed or cracked, or so deteriorated that it affects the light pattern and your visibility while driving. Check the overall condition of the headlamp before replacing.
Read more: Yellow, Cloudy Headlights: Polish, Replace the Lens, or Replace the Whole Headlamp?

ZETA lens covers are replacement parts for supported models. Choose the cover that matches the make, model, year and headlamp design, as the same model may come with several headlamp designs depending on the trim.
Read more: How to Choose the Right Headlight Parts for Your Car

ZETA offers lens covers for more than 200 models across many makes, such as Toyota, Honda, Isuzu, Ford, BMW and Mercedes-Benz. Check supported models on the ZETA Thailand website or ask our staff with your car details.
Read more: How to Choose the Right Headlight Parts for Your Car

ZETA headlight lens covers carry a 1-year warranty, with coverage according to the company's terms. Please keep your proof of purchase for any service request.

An LED headlight bulb produces light with light-emitting diodes, converting electricity into light. LEDs are energy-efficient, respond instantly and can deliver high brightness in a compact size.

Halogen bulbs heat a filament until it glows, xenon (HID) bulbs use an electric arc inside the bulb, and LEDs use semiconductors to produce light. Each type differs in efficiency, heat, lifespan and suitability for a given headlamp.

It can, when you choose a quality bulb that suits your original headlamp. However, the usable brightness depends on the position of the light source, the headlamp design and the beam pattern, not just the bulb's lumen rating.

Watts (W) is the electrical power used, lumens (lm) is the amount of light the bulb produces, and kelvin (K) is the colour temperature, e.g. 3000K gives a yellowish light and 6000K a white light. Consider all three together with the beam pattern when choosing a bulb.

White light around 6000K looks bright and can make some details easier to see. In heavy rain or thick fog, a warmer light may be more comfortable or more suitable in some situations. Visibility also depends on the intensity and direction of the beam.

No. Watts measure power consumption, not brightness. A highly efficient LED can produce more light while using less power, and the brightness on the road also depends on the headlamp system.

It depends on the bulb base, the space inside the headlamp, the car's electrical system and whether the beam pattern is suitable. Some models are plug-and-play, while others need additional parts or are not suitable for LED conversion.

LED bulbs still generate heat, especially at the LED chips and the cooling unit. An unsuitable bulb, incorrect installation or insufficient cooling can shorten the life of the bulb and of the parts inside the headlamp.

The LED's light source may not line up with the original headlamp design, so the beam spreads in the wrong direction, or the headlights may be installed or aimed incorrectly. Always check the beam pattern after installation.

Check the bulb base, car model, year, headlamp type and electrical system before buying, and consider the beam quality, heat dissipation and compliance with road-use regulations.

ZETA LED headlight bulbs carry a 2-year warranty (a few models differ; see the product page), with coverage according to the company's terms. Please keep your proof of purchase for any service request.

A Bi-LED projector is a headlight unit that uses an LED light source with a projector lens to control and shape the beam. It can work as both low beam and high beam in a single unit.
Read more: What Is a Bi-LED Projector, and How Is It Different from an LED Bulb?

An LED bulb is only a light source. A Bi-LED projector is a complete lighting system that combines the light source, reflector or light collector, lens and beam-control mechanism, allowing a properly designed beam pattern and cut-off line.
Read more: What Is a Bi-LED Projector, and How Is It Different from an LED Bulb?

A well-designed, properly installed projector controls the direction of the beam, putting light where it is needed with a sharp cut-off line. Real-world performance depends on the projector's quality, the installation and the headlight aim.

Yes. A Bi-LED projector designed for both functions uses a beam-control mechanism, such as a moving shutter, to switch between low and high beam.

A Bi-LED projector uses LEDs as its main light source, whereas a genuine laser headlight uses laser light together with a phosphor converter and dedicated optics. "Laser" in some product names may be a marketing term only, so check the actual technology of the product.

Some models can be retrofitted with projectors, but you need to consider the space inside the headlamp, mounting, the electrical system, safety and the relevant legal requirements. Have an experienced technician assess the car before installation.
Read more: What Is a Bi-LED Projector, and How Is It Different from an LED Bulb?

A retrofit projector installed inside the original headlamp usually requires opening the headlamp, but the method can differ depending on the car's construction and the type of product.

They can be used in many types of vehicles, including sedans, pickups and SUVs, as long as there is enough mounting space and a suitable electrical system. Check compatibility with each model and adjust the beam after installation.
Read more: What Is a Bi-LED Projector, and How Is It Different from an LED Bulb?

ZETA projectors carry a 2-year warranty (a few models differ; see the product page), with coverage according to the company's terms. Please keep your proof of purchase for any service request.

A headlight chip module is a component or circuit involved in producing or controlling light in an LED headlight system. Its form and function vary with each car model's design. If it fails, it may be possible to replace just the module in some cases.
Read more: Yellowed Light Guide or Faulty DRL: Can You Replace Just That Part?

A light guide is a part that carries and spreads light from the source along a designed path. It is commonly found in Daytime Running Lights (DRL) or decorative lighting inside the headlamp, creating a continuous, even line of light.
Read more: Yellowed Light Guide or Faulty DRL: Can You Replace Just That Part?

On some models the light guide can be replaced on its own without replacing the whole headlamp, depending on the headlamp's construction, the condition of the parts and the availability of an exact-fit part.
Read more: Yellowed Light Guide or Faulty DRL: Can You Replace Just That Part?

DRLs make a car more visible during the day, helping other road users notice it more easily. DRL systems may use LEDs or other technology depending on the car manufacturer's design.
Read more: Yellowed Light Guide or Faulty DRL: Can You Replace Just That Part?

A fog light projector uses a lens and beam-control parts to shape the light, while ordinary fog lights may use a reflector. The performance of each depends on the design, installation and beam adjustment.

Matrix LED headlights can control many LED segments independently to adapt the beam to the situation; supported systems can dim certain areas to avoid dazzling other road users. Ordinary projectors usually have a fixed beam pattern or switch between low and high beam.

Not always. A headlamp is made of many parts, such as the lens cover, light guides, chip modules and projector. If the faulty part can be replaced separately, repairing just that part can be a lower-cost option.

Tell us the make, model, year, trim and headlight type of your car, and send a photo of the headlamp or the original part number if you have it, so our staff can confirm the fit before you order.

It depends on the product. Some bulbs can be replaced without opening the headlamp, but replacing lens covers, light guides, chip modules or projectors usually needs special tools and skills, so we recommend an experienced technician.
Read more: Can You Replace a Headlight Lens Yourself? Steps and Tools

It varies with the car model, the type of sealant, how hard the headlamp is to dismantle and its condition. Some models can take several hours, so ask the installer for an estimate before booking.
Read more: Can You Replace a Headlight Lens Yourself? Steps and Tools

It can, if moisture builds up, the ventilation does not work properly or the headlamp is not fully sealed. Correct installation and checking that the headlamp is properly sealed are key to preventing this.
Read more: Foggy Headlights and Condensation Inside the Lamp: Causes and Fixes

Possible risks include damage to the lens cover or housing, damage to internal parts, incomplete sealing and headlight aim changing from the original. Choose a technician with the right tools and experience.
Read more: Can You Replace a Headlight Lens Yourself? Steps and Tools

Wash them with water and a suitable car-cleaning product using a clean microfibre cloth. Avoid harsh chemicals, solvents and abrasive materials, and avoid polishing the cover unnecessarily, as this can damage the UV-protective coating.
Read more: Yellow, Cloudy Headlights: Polish, Replace the Lens, or Replace the Whole Headlamp?

Yes, provided the shop has the skills and tools for that product. For jobs such as opening headlamps, replacing lens covers and installing projectors, choose an experienced technician for a safe installation with less risk of damage.
Read more: Starting a Headlight Repair Shop: The Tools Checklist

ZETA LED headlight bulbs and projectors carry a 2-year warranty, while headlight lens covers, light guide strips, light guide modules, headlight brows and brow modules carry a 1-year warranty. A few models have a different warranty period, shown on the product page. Coverage follows the company's terms; please check the details of each model before buying.

Contact the shop where you bought the product or ZETA's service channels with details of the problem, the product model and your proof of purchase, and our staff will check it and explain the service steps under the warranty terms.

Coverage depends on the product type and the stated terms. The cause of the problem must be checked before a warranty claim is assessed, for example a manufacturing defect versus damage caused by incorrect installation or use, which may be treated differently.

Contact the dealer you bought from to report the problem and follow their procedure. Have your proof of purchase, photos of the product and details of the fault ready to speed up the inspection.

Car accessory shops, headlight repair shops, auto parts stores and anyone interested in becoming a dealer can contact ZETA Thailand for product details, application requirements and partnership options.

Businesses can contact the ZETA sales team about wholesale terms, available products and ordering details. Pricing and minimum order quantities may vary by product type.

You get an order number and payment details right away. Transfer the amount and upload your payment slip on the order page.

Orders ship within 1-2 business days after payment is confirmed. A tracking number is shown on your order page.

Chat with us on LINE with your car model and year before ordering.