A Toyota Tundra headlight upgrade cannot always be matched by model year alone.

That becomes especially clear when comparing the documented 2020–2021 and 2022 Tundra retrofit references.

The earlier high-spec headlamp uses a rear-mounted replacement projector while retaining the factory high-beam LED reflector.

The documented 2022 low-trim headlamp takes a completely different approach, using a four-projector bracket system with separate inner and outer projector positions.

Both are Toyota Tundra retrofit solutions.

But mechanically and electrically, they are very different jobs.

Royalin currently documents two specific applications:

• a 2020–2021 high-spec Tundra headlamp;
• a 2022 low-trim Tundra headlamp with a quad-projector conversion.

These references should not be interpreted as universal solutions for every Tundra headlight from those years.

The actual lamp still needs to be identified first.

The 2020–2021 High-Spec Retrofit Retains Part of the OEM Optical System

The 2020–2021 Toyota Tundra high-spec projector retrofit case is built around the pictured high-spec headlamp.

The replacement projector is rear-mounted using a vehicle-specific left/right bracket set.

Importantly, the factory high-beam LED reflector is retained.

This means the retrofit does not simply remove every original optical component and replace the complete internal system.

Instead, the new projector works alongside selected OEM components.

The daytime running light structure is also restored after the projector and shroud are installed.

Projector Body Size Matters on the 2020–2021 Headlight

A bracket may match the headlight while the projector body still creates a clearance problem.

That is one of the most useful lessons from this case.

The documented setup requires the shop to verify the selected projector's:

• mounting dimensions;
• rear body depth;
• heat-sink or fan size;
• connector position;
• housing clearance.

The reference does not show housing modification for the pictured projector, but a projector with a different body can require additional preparation.

So a statement such as:

“It is a 3-inch projector.”

is not enough to confirm compatibility.

The complete projector dimensions matter.

The Toyota Decoder Is Part of the Electrical Match

The 2020–2021 high-spec application also uses a Toyota-compatible decoder.

Mechanical fitment and electrical matching should therefore be checked separately.

The documented decoder provides reference wire functions, but the actual vehicle-side wiring should still be verified before connection.

The shop should confirm:

• low-beam positive;
• low-beam negative;
• high-beam function;
• decoder signal;
• polarity.

If a high-power projector is selected, the documented reference also calls for an additional wiring harness.

That means projector power requirements should be considered before the headlight is finally assembled.

The C-Style Shroud and Reflector Area Need Clearance Checks

The recommended C-style shroud requires local edge trimming.

A small reflector area may also need controlled grinding to prevent bracket contact.

These are good examples of the difference between vehicle-specific fitment and no-modification fitment.

A bracket can be designed for a specific lamp while still requiring small, controlled preparation around the actual projector and trim.

The goal should be to remove only the material required for clearance.

2022 Changes the Headlight Architecture

The 2022 Toyota Tundra low-trim quad-projector retrofit case follows a completely different design.

Instead of one replacement projector working with a retained OEM high-beam reflector, the documented conversion uses four projector positions across the pair of headlights.

The kit combines:

• four projector brackets;
• four compatible projectors;
• four shrouds;
• installation hardware;
• an H4 wide-voltage harness.

This is not simply the 2020–2021 solution with more projectors added.

It is a different retrofit architecture.

The 2022 Headlight Must Be Identified Before Ordering

For 2022, this point becomes especially important.

Toyota offered more than one LED headlight configuration in the U.S. market, including standard LED and Premium LED systems.

That means:

“2022 Toyota Tundra”

does not automatically identify the internal headlamp structure.

The Royalin quad-projector case applies to the pictured low-trim headlamp configuration.

It should not automatically be applied to:

• premium headlamps;
• other regional versions;
• aftermarket replacement housings;
• other internal structures.

A clear headlight photo is therefore more useful than the year alone.

The Quad-Projector Conversion Requires Controlled Trim Preparation

The 2022 low-trim conversion requires preparation of the factory lower trim panel.

The important detail is that the two identified lower mounting points must remain intact.

This is not broad cutting.

The objective is to create projector clearance while preserving the mounting structure needed to restore the trim correctly.

Additional marked interference areas around the outer projector and plastic housing also require controlled trimming.

The shrouds must then be checked against the available front clearance.

The Inner Projector Uses a Spacer to Control Height

The 2022 reference includes another small but important fitment detail.

A plastic spacer is used to raise the inner projector slightly.

That helps control:

• projector height;
• clearance;
• visual alignment;
• beam alignment.

With four projectors inside the pair of headlights, small positioning errors become more noticeable.

The projectors need to look and function as a coordinated system rather than four unrelated units.

The H4 Harness Is Part of the 2022 Retrofit

The documented low-trim headlamp retains the specified light source and uses an H4 wide-voltage harness.

The reference identifies wiring functions for low beam, high beam and ground, but those functions should still be verified on the actual vehicle before connection.

Again, mechanical compatibility does not automatically confirm electrical compatibility.

The shop should treat wiring as a separate check.

Two Generations, Two Different Retrofit Problems

The differences can be summarized simply:

The truck name remains the same.

The retrofit logic changes significantly.

What Should a Retrofit Shop Check Before Ordering?

For either Tundra application, useful information includes:

1. Vehicle year
2. Market or country
3. Full front vehicle photo
4. Close headlight photo
5. Rear housing photo
6. Headlamp label
7. OEM or aftermarket housing
8. Internal headlight photo if available
9. Existing projector or reflector layout
10. Connector and wiring photo
11. Intended replacement projector
12. Projector body dimensions
13. Intended retrofit goal

For 2020–2021, also confirm whether the headlamp matches the documented high-spec reference.

For 2022, confirm the actual headlamp configuration rather than assuming every Tundra from that year uses the low-trim lamp shown in the case.

For U.S.-market 2022 trucks, Toyota's official Tundra brochure is also useful for understanding that different LED headlight specifications were offered across the lineup.

Match the Headlight Before the Retrofit Kit

The two documented Tundra cases show why a model-year search is only the beginning.

The 2020–2021 high-spec headlamp uses a rear-mounted replacement projector, retained OEM high beam, Toyota decoder and projector-specific clearance checks.

The 2022 low-trim headlamp uses a four-projector architecture, H4 harness, trim preparation and multi-projector alignment.

Those are fundamentally different systems.

For retrofit shops and distributors, the practical rule is simple:

confirm the actual Tundra headlight before selecting the projector bracket, wiring or retrofit kit.

That one step makes the rest of the matching process much more predictable.