Own a Lexus RZ 300E in the Phoenix area? EZ Swap LLC repairs and maintains the Lexus RZ 300E for model years 2024 to 2025. Our shop at 9050 N 9th St handles everything from routine service to diagnostics and major repairs.
To help RZ 300E owners know what to watch for, we reviewed public records from the National Highway Traffic Safety Administration (NHTSA). For these model years NHTSA has 7 owner complaints on file for the RZ 300E and 0 safety recall campaigns. The most-reported problem areas are electrical system (5), lane departure (1), seat belts (1).
Most-Reported Lexus RZ 300E Problems
These problem areas come up most often in NHTSA owner complaints for the RZ 300E (all model years combined). Complaint counts reflect reports filed, not the share of vehicles affected, so popular and older models naturally have more.
| Problem area (NHTSA component) | Complaints | Share | |
|---|---|---|---|
| Electrical System | 5 | 71% | |
| Lane Departure | 1 | 14% | |
| Seat Belts | 1 | 14% | |
| Fuel/Propulsion System | 1 | 14% |
Electrical System
5 of the 7 complaints (71%) mention the electrical system. Electrical problems are made worse by desert heat, which ages batteries, cables and connectors. We test the battery, starter and charging system and trace faults to the actual part. See our battery replacement and starter & alternator repair pages.
Lane Departure
1 of the 7 complaints (14%) mention driver-assistance and stability systems. Driver-assistance and stability systems rely on sensors and software. We scan for stored codes and diagnose sensor and wiring faults. See our check engine light diagnostics page.
Seat Belts
1 of the 7 complaints (14%) mention airbags and seat belts. Airbag and restraint issues are often tied to open safety recalls, which are repaired by the manufacturer at no cost to you. Check your VIN on NHTSA's recall lookup first, and we can help with related warning lights and diagnostics. See our auto repair page.
Lexus RZ 300E Complaints by Model Year
The RZ 300E model years with the most NHTSA complaints on file are 2024, 2025. Older model years have had more time to collect reports, so use this table as a guide for what to inspect, not as a verdict on any one vehicle.
| Model year | Complaints on file | |
|---|---|---|
| 2024 | 5 | |
| 2025 | 2 |
Lexus RZ 300E Check Engine Codes
NHTSA owner complaints rarely cite specific trouble codes for the RZ 300E, so we do not have a model-specific ranking to show. These are the check engine codes we see most often on vehicles in Phoenix heat, and any of them can show up on a Lexus.
| Code | What it means |
|---|---|
| P0420 | Catalyst efficiency below threshold (bank 1) Often a worn catalytic converter, but failing oxygen sensors or exhaust leaks can set it too. Can cause an emissions test failure. |
| P0300 | Random or multiple cylinder misfire Worn spark plugs, failing ignition coils, fuel or vacuum problems. Do not ignore a flashing check engine light. |
| P0171 | System too lean (bank 1) Often a vacuum leak, dirty MAF sensor, weak fuel delivery or a failing oxygen sensor. |
| P0455 | EVAP system large leak Missing or loose gas cap, or a disconnected or cracked vapor hose. |
| P0128 | Coolant temperature below thermostat regulating temperature Usually a thermostat stuck open. Fix it to restore efficiency and cabin heat. |
| P0442 | EVAP system small leak Loose or worn gas cap, cracked hose or purge or vent valve. |
| P0301 | Cylinder 1 misfire Commonly a bad spark plug or ignition coil on that cylinder. |
| P0401 | EGR flow insufficient Clogged EGR passages or a stuck EGR valve. |
Got a check engine light on your RZ 300E? A code is a clue, not a diagnosis, so we scan it and test the system before replacing anything. See our check engine light diagnostics.
Serious Incident Reports
Of the NHTSA complaints on file for the RZ 300E, 1 involved a crash. These numbers are drawn from self-reported complaints and are not verified findings. If your vehicle has an open recall, get it repaired promptly.
Keeping a Lexus RZ 300E Reliable in Phoenix
Arizona heat is the hardest test a Lexus will face. Batteries, belts, hoses, tires and engine oil all wear faster here, and a RZ 300E that spends its life in stop-and-go Valley traffic needs maintenance earlier than the owner's manual's normal schedule suggests.
Our recommendation for RZ 300E owners: follow the severe-service schedule, test the battery before every summer, inspect brakes and tires twice a year, and have any warning light diagnosed instead of ignored. If you are shopping for a used Lexus RZ 300E, a pre-purchase inspection shows what the paperwork does not.
Lexus RZ 300E Services at EZ Swap LLC
Get the details on our Phoenix Lexus RZ 300E repair service, or choose a service below.
Battery Replacement
Test, replace and protect against Phoenix heat.
Details →Starter & Alternator Repair
Charging and starting system repair.
Details →Check Engine Light Diagnostics
Scan, test and pinpoint the real cause.
Details →Auto Repair
All makes and models, from domestic trucks to imports.
Details →Oil Change & Maintenance
Oil, filters, fluids, tires and scheduled service.
Details →Car A/C Repair
Phoenix heat demands cold air.
Details →Lexus RZ 300E FAQ
What are the most common problems with the Lexus RZ 300E?
Based on NHTSA owner complaints, the most-reported problem areas for the Lexus RZ 300E are electrical system (5), lane departure (1), seat belts (1). Complaint counts reflect reports filed, not the share of vehicles affected.
Which RZ 300E model years have the most complaints?
The RZ 300E model years with the most NHTSA complaints on file are 2024, 2025. Older years have had longer to collect reports, so inspect any specific vehicle before buying.
What check engine codes are common on the Lexus RZ 300E?
NHTSA complaints rarely cite specific codes for the Lexus RZ 300E. On Phoenix vehicles in general, we see P0420, P0300 misfires, P0171 lean conditions and EVAP leaks such as P0455 and P0442 most often. Bring yours in and we will scan and test it.
Does the Lexus RZ 300E have any safety recalls?
NHTSA lists 0 recall campaigns for the Lexus RZ 300E across model years 2024 to 2025. Each recall applies only to certain vehicles, so enter your VIN at nhtsa.gov/recalls to see if yours is affected.
Do you repair the Lexus RZ 300E in Phoenix?
Yes. EZ Swap LLC repairs and maintains Lexus vehicles including the RZ 300E, at 9050 N 9th St in Phoenix. Call or text (602) 246-9063 for an appointment.
Is a pre-purchase inspection worth it for a used Lexus RZ 300E?
Yes. An inspection checks the engine, transmission, brakes, suspension, A/C and electrical system, and scans for stored codes, so you know the real condition before you buy.
How often should I service my Lexus RZ 300E in Phoenix?
Follow the severe-service schedule in your owner's manual, since heat and stop-and-go driving count as severe use. Test the battery before summer and inspect brakes and tires regularly.
More Lexus Models We Service
Source: public complaint and recall records from the National Highway Traffic Safety Administration (nhtsa.gov). Counts reflect reports filed and do not predict the condition of any individual vehicle.