EZ Swap LLC services the Lexus RX400H in Phoenix, AZ, covering model years 2005 to 2008. If your RX400H has a warning light, a strange noise or a safety recall question, our mechanics can diagnose it and give you a clear quote first.
To help RX400H owners know what to watch for, we reviewed public records from the National Highway Traffic Safety Administration (NHTSA). For these model years NHTSA has 459 owner complaints on file for the RX400H and 5 safety recall campaigns. The most-reported problem areas are service brakes (74), electrical system (68), vehicle speed control (55).
Most-Reported Lexus RX400H Problems
These problem areas come up most often in NHTSA owner complaints for the RX400H (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 | |
|---|---|---|---|
| Service Brakes | 74 | 16% | |
| Electrical System | 68 | 14% | |
| Vehicle Speed Control | 55 | 11% | |
| Structure | 51 | 11% | |
| Engine | 46 | 10% | |
| Steering | 39 | 8% | |
| Service Brakes, Hydraulic | 34 | 7% | |
| Power Train | 31 | 6% |
Service Brakes
74 of the 459 complaints (16%) mention brakes. Brake complaints turn up on nearly every vehicle, and Phoenix stop-and-go traffic wears brake parts quickly. We measure pads and rotors, check calipers and fluid, and replace only what is worn. See our brake repair page.
Electrical System
68 of the 459 complaints (14%) 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.
Vehicle Speed Control
55 of the 459 complaints (11%) mention vehicle speed control (throttle and cruise control). Speed control complaints involve the throttle, cruise control and related sensors. We scan for stored codes and test the throttle system and sensors to find the actual cause instead of guessing. See our check engine light diagnostics and auto repair pages.
Lexus RX400H Complaints by Model Year
The RX400H model years with the most NHTSA complaints on file are 2006, 2008, 2007. 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 | |
|---|---|---|
| 2005 | 29 | |
| 2006 | 186 | |
| 2007 | 117 | |
| 2008 | 127 |
Most Common Lexus RX400H Check Engine Codes
Owners often put the exact trouble code in their NHTSA complaint. These are the codes cited most often for the RX400H. The most-cited is C1391 (manufacturer-specific chassis code), mentioned in 3 complaints. Counts reflect complaints that name a code, not every car on the road.
| Code | What it means | Complaints citing it |
|---|---|---|
| C1391 | Manufacturer-specific chassis code The meaning of this code varies by make and model, so it needs to be looked up for your vehicle and tested. | 3 |
| C1256 | Manufacturer-specific chassis code The meaning of this code varies by make and model, so it needs to be looked up for your vehicle and tested. | 2 |
A code is a clue, not a diagnosis. The same code can have several causes, so we test before replacing parts. See our check engine light diagnostics, and read whether it is safe to drive with the check engine light on.
Lexus RX400H Safety Recalls
NHTSA lists 5 recall campaigns for the RX400H in these model years, most often involving vehicle speed control, engine and engine cooling, electrical system. Recalls are repaired by the manufacturer at no charge to you, but each applies only to certain vehicles. Look up your VIN at nhtsa.gov/recalls.
- 2013 recall, Hybrid Propulsion System (campaign 13V396000): Toyota is recalling certain model year 2006-2010 Highlander hybrid vehicles manufactured February 16, 2005, through July 29, 2010; and model year 2006-2008 Lexus RX400h vehicles manufactured February 23, 2005, through December 2, 2008.
- 2011 recall, Vehicle Speed Control (campaign 11V112000): TOYOTA IS RECALLING CERTAIN MODEL YEAR 2004-2006 HIGHLANDER, HIGHLANDER HYBRID, AND MODEL YEAR 2004-2007 LEXUS RX330, RX350, AND RX400H VEHICLES.
- 2011 recall, Engine And Engine Cooling (campaign 11V539000): TOYOTA IS RECALLING CERTAIN MODEL YEAR 2004 AVALON VEHICLES; 2004 AND 2005 CAMRY, CAMRY SOLARA, HIGHLANDER, AND SIENNA VEHICLES, 2006 HIGHLANDER HYBRID; 2004 AND 2005 LEXUS ES330 AND RX330;
- 2011 recall, Electrical System (campaign 11V342000): TOYOTA IS RECALLING CERTAIN MODEL YEAR 2006-2007 HIGHLANDER HYBRID AND LEXUS RX400H PASSENGER CARS MANUFACTURED FROM FEBRUARY 16, 2005, THROUGH AUGUST 30, 2006.
- 2006 recall, Vehicle Speed Control (campaign 06V253000): ON CERTAIN SPORT UTILITY AND HYBRID VEHICLES, THE TWO RETAINING CLIPS FOR THE DRIVER'S SIDE FORWARD CENTER CONSOLE CAN BECOME LOOSE.
Serious Incident Reports
Of the NHTSA complaints on file for the RX400H, 51 involved a crash, 6 involved a fire, 25 reported injuries. 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 RX400H 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 RX400H 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 RX400H 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 RX400H, a pre-purchase inspection shows what the paperwork does not.
Lexus RX400H Services at EZ Swap LLC
Get the details on our Phoenix Lexus RX400H repair service, or choose a service below.
Brake Repair
Pads, rotors, calipers, fluid and brake lines.
Details →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 →Lexus RX400H FAQ
What are the most common problems with the Lexus RX400H?
Based on NHTSA owner complaints, the most-reported problem areas for the Lexus RX400H are service brakes (74), electrical system (68), vehicle speed control (55). Complaint counts reflect reports filed, not the share of vehicles affected.
Which RX400H model years have the most complaints?
The RX400H model years with the most NHTSA complaints on file are 2006, 2008, 2007. Older years have had longer to collect reports, so inspect any specific vehicle before buying.
What are the most common check engine codes on the Lexus RX400H?
In NHTSA owner complaints for the Lexus RX400H, the codes cited most often are C1391 (manufacturer-specific chassis code), C1256 (manufacturer-specific chassis code). A code points to a system, and testing confirms the actual failed part.
Does the Lexus RX400H have any safety recalls?
NHTSA lists 5 recall campaigns for the Lexus RX400H across model years 2005 to 2008. 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 RX400H in Phoenix?
Yes. EZ Swap LLC repairs and maintains Lexus vehicles including the RX400H, 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 RX400H?
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 RX400H 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.