What Does TPMS Warning Light Mean?
Reviewed by automotive technicians · Last updated August 22, 2026
Quick Answer
TPMS Warning Light = One or more tires are significantly underinflated, or the Tire Pressure Monitoring System sensor has failed. The Lexus RX 350 uses direct TPMS sensors in each wheel that transmit pressure data to the vehicle's computer.
Severity: Warning · System: Lexus RX 350 (2016-2025)
DRIVE WITH CAUTION — Repair Soon
One or more tires are significantly underinflated, or the Tire Pressure Monitoring System sensor has failed. The Lexus RX 350 uses direct TPMS sensors in each wheel that transmit pressure data to the vehicle's computer.
What you see: A yellow exclamation mark inside a tire cross-section icon, or 'TIRE PRESSURE' text on the multi-information display
What to Do Right Now
Check tire pressures with a gauge when the tires are cold (before driving). Inflate to the pressure listed on the driver's door jamb sticker (typically 33-36 PSI for RX 350). If the light stays on after inflating, a TPMS sensor may need replacement. The sensors have a battery life of 5-7 years and will eventually need replacement, which is common on 2016-2018 models.
Repair Cost Estimate
| Option | Est. Cost | Notes |
|---|---|---|
| Do It Yourself | $0 (air at gas station); $40-80 (tire pressure gauge + inflator) | If you have basic tools and mechanical knowledge |
| Mechanic / Dealer | $50-150 (sensor replacement per wheel); $200-400 (all four sensors) | Includes diagnostic labor + parts |
About This Data
Dashboard warning light information compiled from Lexus owner's manuals, OEM service documentation, SAE J2402 standards, and NHTSA guidance. This is an independent reference — not affiliated with or endorsed by Lexus. All brand names, model names, and dashboard symbols are trademarks of their respective vehicle manufacturers.
Published: 2026-08-22 · Repair costs are national averages and vary by location. Always get multiple quotes before authorizing repairs.
⚠️ Red dashboard lights demand immediate action — continued driving may cause engine damage or brake failure. When in doubt, pull over and consult a certified mechanic.
By Patricia N. Simmons — Automotive Electronics Specialist
Patricia has spent 12 years researching instrument cluster diagnostics and dashboard warning light systems across 20+ automotive brands. She has analyzed over 500 OEM owner's manuals and SAE standards to compile this reference. Her experience includes field diagnostics with certified technicians, cross-referencing NHTSA technical service bulletins, and building practical decision guides that help drivers understand exactly what each warning light means — and whether they should keep driving or pull over immediately.
About Patricia · Published: 2026-08-22 · Updated: August 22, 2026
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Frequently Asked Questions
Can I drive my Lexus RX 350 with the TPMS Warning Light on?
Yes, but check tire pressure as soon as possible. Driving on underinflated tires reduces fuel economy, causes uneven tire wear, and increases the risk of a blowout at highway speeds.
How much does it cost to fix the TPMS Warning Light on a Lexus RX 350?
DIY cost estimate: $0 (air at gas station); $40-80 (tire pressure gauge + inflator). Mechanic/dealer estimate: $50-150 (sensor replacement per wheel); $200-400 (all four sensors). Costs vary by location, shop rate, and whether additional components are found to be damaged during diagnosis. Always get 2-3 quotes before authorizing repairs.
What causes the TPMS Warning Light to come on in a Lexus RX 350?
The most common causes include low tire pressure due to temperature changes, a slow leak from a puncture, TPMS sensor battery failure (common after 5-7 years), or sensor damage from a tire change. The most common causes vary by model year and driving conditions.