Lexus RX Headlights: Specs, Fitment & Common Faults
Bulb type, unit part numbers, and the faults that actually cause that flickering or dim light you've noticed.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — aftermarket LH Hella 1ZT 009 631-311 / RH TYC 20-17415-06-9
| Passenger side (LH / nearside) headlight — aftermarket | Hella 1ZT 009 631-311 (bi-xenon D1S, H11, PY21W, with DRL, dynamic bending light, bulbs included, no ballast); Prasco LS7024904 (LED, electric levelling motor); TYC 20-17416-06-9 (LED, electric levelling); Alkar 2743523 (LED, PY24W/H4 listed, motor); Alkar 2751283 (halogen H1/H7, W5W, electric motor); TYC 20-0318-25-2 (halogen H7/H7, electric motor) |
|---|---|
| Driver's side (RH / offside) headlight — aftermarket | Prasco LS7024903 (LED, electric levelling motor); TYC 20-17415-06-9 (LED, electric levelling); Alkar 2744523 (LED, PY24W/H4 listed, motor); TYC 20-0389-05-2 (halogen H1/H7, electric motor); Johns 25 42 10 (halogen, LED DRL, no levelling motor); Abakus 550-1130R-LD-EM (halogen H1/H7, electric) |
| Bulb types | dipped H7, main H1 (halogen units); H11 and D1S (bi-xenon); indicator PY21W or PY24W; sidelight W5W; H4 on basic units |
| Genuine (OE) numbers quoted | None quoted in catalogue listings — order genuine units against your VIN |
| Fitment notes | LED, bi-xenon and halogen units are listed; only the Hella unit is xenon and it is shown for the passenger side. Some listed units carry other-vehicle year tags, so confirm fitment. |
A Genuinely Important UK Rule Worth Knowing Before You Buy — Lexus RX Headlights
If your RX has factory-fitted halogen headlamp housings, converting them to fit LED bulbs is treated as a definite MOT failure under the current inspection manual — this isn't a grey area or a minor advisory, since a housing designed for halogen doesn't distribute an LED bulb's light output correctly, which can genuinely dazzle oncoming drivers. If you want a genuine LED upgrade, the correct route is a complete headlight unit designed for LED from the factory, not a bulb swap into an existing halogen housing.
Lexus RX Headlights: Watch: Replacing It
No 2015+ RX video found; AL10 gen bulb change
Lexus RX Headlights: What It Does
The Lexus RX's headlight unit job is positioning the main and dipped beam bulbs (or LED/matrix modules on higher trims) to light the road without dazzling oncoming drivers. That housing frequently also contains the daytime running light and front indicator, which is exactly why part numbers and repairs here can get complicated.
Lexus RX Headlights: Generations, Derivatives & Headlight Type
| Standard trims | Halogen with LED daytime running lights, or Bi-LED (standard full LED with automatic high beam) depending on model year |
|---|---|
| F Sport, factory option | Genuine "Triple-Beam LED" headlights — a distinctive three-projector L-shaped design using Matrix technology, historically priced as a costly standalone option (around $1,615 when new) rather than a bundled freebie; confirmed as a different, more advanced system than standard Bi-LED, not just a styling change |
| Market note | Full Matrix functionality on Triple-Beam headlights is not available on North American-market cars due to regulations — only Europe and Japan get the complete adaptive functionality despite the hardware looking identical |
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Lexus RX Headlights: Common Faults, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Headlights Guide for the four bulb technologies and how they differ, UK law on aim and modifications, common faults to check for, how difficult this job is to DIY, and confirming fitment against your VIN.
More Lexus Headlights
The same part, covered across other Lexus models.