Own a Infiniti Q45 in the Phoenix area? EZ Swap LLC repairs and maintains the Infiniti Q45 for model years 2005 to 2006. Our shop at 9050 N 9th St handles everything from routine service to diagnostics and major repairs.
To help Q45 owners know what to watch for, we reviewed public records from the National Highway Traffic Safety Administration (NHTSA). For these model years NHTSA has 4 owner complaints on file for the Q45 and 3 safety recall campaigns. The most-reported problem areas are vehicle speed control (1), seats (1), air bags (1).
Most-Reported Infiniti Q45 Problems
These problem areas come up most often in NHTSA owner complaints for the Q45 (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 | |
|---|---|---|---|
| Vehicle Speed Control | 1 | 25% | |
| Seats | 1 | 25% | |
| Air Bags | 1 | 25% | |
| Tires | 1 | 25% | |
| Electrical System | 1 | 25% |
Vehicle Speed Control
1 of the 4 complaints (25%) 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.
Seats
1 of the 4 complaints (25%) mention seats and head restraints. Seat and restraint complaints are often covered by safety recalls, which the manufacturer repairs at no charge. Check your VIN first, and we can inspect seat hardware and related warning lights. See our auto repair page.
Air Bags
1 of the 4 complaints (25%) 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.
Infiniti Q45 Check Engine Codes
NHTSA owner complaints rarely cite specific trouble codes for the Q45, 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 Infiniti.
| 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 Q45? 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.
Infiniti Q45 Safety Recalls
NHTSA lists 3 recall campaigns for the Q45 in these model years, most often involving air bags, exterior lighting, child seat. 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.
- 2012 recall, Air Bags (campaign 12V079000): NISSAN IS RECALLING CERTAIN MODEL YEAR 2003-2005 INFINITI Q45 VEHICLES. A WIRING CONNECTOR FOR THE SEAT MOUNTED AIRBAG MAY EXPERIENCE INCREASED ELECTRICAL RESISTANCE, RESULTING IN THE NON-DEPLOYMENT OF THE SIDE AIR BAGS.
- 2006 recall, Exterior Lighting (campaign 06V395000): CERTAIN VEHICLES FAIL TO COMPLY WITH THE STOP LAMP AND REFLEX REFLECTOR REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, 'LAMPS, REFLECTIVE DEVICES, AND ASSOCIATED EQUIPMENT."
- 2005 recall, Child Seat (campaign 05V374000): CERTAIN PASSENGER VEHICLES EQUIPPED WITH POWER REAR SEATS FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO.
Serious Incident Reports
Of the NHTSA complaints on file for the Q45, 1 involved a crash, 1 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 Infiniti Q45 Reliable in Phoenix
Arizona heat is the hardest test a Infiniti will face. Batteries, belts, hoses, tires and engine oil all wear faster here, and a Q45 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 Q45 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 Infiniti Q45, a pre-purchase inspection shows what the paperwork does not.
Infiniti Q45 Services at EZ Swap LLC
Get the details on our Phoenix Infiniti Q45 repair service, or choose a service below.
Infiniti Q45 FAQ
What are the most common problems with the Infiniti Q45?
Based on NHTSA owner complaints, the most-reported problem areas for the Infiniti Q45 are vehicle speed control (1), seats (1), air bags (1). Complaint counts reflect reports filed, not the share of vehicles affected.
Which Q45 model years have the most complaints?
The Q45 model years with the most NHTSA complaints on file are 2005. Older years have had longer to collect reports, so inspect any specific vehicle before buying.
What check engine codes are common on the Infiniti Q45?
NHTSA complaints rarely cite specific codes for the Infiniti Q45. 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 Infiniti Q45 have any safety recalls?
NHTSA lists 3 recall campaigns for the Infiniti Q45 across model years 2005 to 2006. 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 Infiniti Q45 in Phoenix?
Yes. EZ Swap LLC repairs and maintains Infiniti vehicles including the Q45, 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 Infiniti Q45?
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 Infiniti Q45 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 Infiniti 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.