The circuit board for crank position sensor and cam position sensor have improper solder joints. This has caused the service engine light to come on, the engine may not start, power reduces, engine stalls at a traffic light or while in motion, on a city street or highway or while making a turn. This is also a common problem with the 2002 infiniti m45, q45; 2003 infiniti i35, m45; 2003 nissan altima, maxima, murano, sentra. There are 11 consumer complaints, 3 investigations and 33 service bulletins regarding this issue with the 2003 q45. Infiniti/nissan recall # 03v455000
The worst 2003 Infiniti Q45 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
- Engine7
- Electrical3
- Steering3
- Brakes2
- Driver assistance2
- Acceleration1
- Seat belts1
- Transmission1
Specific symptoms reported on the 2003 Infiniti Q45
Recalls 1
Air bags: side/window
- What is wrong
- 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.
- Risk
- Non-deployment of side air bags could increase the risk of personal injury.
- Remedy
- Nissan will notify owners, and dealers will modify the wiring connector, free of charge. The safety recall began on march 19, 2012. Owners may contact nissan customer service at 1‑800‑647‑7261.
Recall number 12V079000 · Recall details
See all 1 recalls for the 2003 Infiniti Q45
Defect investigations
Non-deployment of Side Thorax Air Bags
The subject vehicles are equipped with seat-mounted, side thorax air bags for the driver and front passenger.This investigation revealed that faulty side air bag module electrical connectors located under the driver and front passenger seats can cause an interruption in the electrical circuit that will drop the input voltage below the specified range.As a result, the air bag warning lamp illuminates on the instrument panel and the affected side air bag becomes deactivated.In June 2009, Nissan conducted a service campaign to repair the defective air bag electrical connectors in the subject vehicles (both Infiniti Q45 and M45 models).In June 2010, Nissan sent a second notification concerning the 2009 campaign to owners of vehicles that have not been remedied.Nissan is now conducting a safety recall of the Q45 vehicles not remedied under the service campaign (approximately 1,349 vehicles; see the federal safety agency Safety Recall No. 12V‑079 for further details).The M45 vehicles are not included in the recall; however, Nissan is re-notifying owners of M45 vehicles that were not remedied under the previous service campaign.See attached report for more information.A safety-related defect trend has not been identified in the Infiniti M45 vehicles at this time and further use of agency resources does not appear to be warranted.Accordingly, this investigation is closed.The closing of this investigation does not constitute a finding by the federal safety agency that no safety-related defect exists.The agency will monitor the issue and reserves the right to take future action if warranted by the circumstances.The ODI reports cited above can be reviewed online at www-odi.the federal safety agency.dot.gov/owners/Searchreference under the following identification (ODI) numbers: 10327196 and 10402282
EA09005
Side air bag non-deployment
The subject vehicles are equipped with seat-mounted, side torso air bags for the driver and front passenger.this investigation has revealed that faulty side air bag module connectors located under the front seats can cause an interruption in the electrical current that will drop the input voltage below the specified range.as a result, the air bag warning lamp illuminates and the affected side air bag is deactivated.the rates of complaints, field reports and warranty claims related to the subject issue are very high.for example, nissan submitted 4,853 warranty claims on 3,551 distinct subject vehicles out of 13,836 total subject vehicles.also, analyses of warranty claims indicate an increasing failure trend over time.this preliminary evaluation has been upgraded to an engineering analysis (ea09-005) to further study the issue.
PE08067
Technical service bulletins for the 2003 Infiniti Q45 67
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Wiring harness repair information
- Certification label and VIN plate replacement service information
- Intelligent key not detected / engine will not start
- Removing foreign material from the window glass
- Window glass warranty information
- Windshield cracking
- Wheel bearing collision damage
- Infiniti; front sonar parking sensor service information
- Navigation map data update matrix
- Exterior cleaning information service information
2003 Infiniti Q45 fuel economy
Official EPA estimates in miles per gallon (MPGe for electric). Ranges cover trims that share the same engine.
| Engine | Drive | City | Highway | Combined |
|---|---|---|---|---|
| 4.5L 8‑cyl | RWD | 16 | 22 | 18 |
What 2003 Infiniti Q45 owners say
Most recent owner complaints, unedited.
Tl* the contact owns a 2003 infiniti q45. While driving 35 MPH, the vehicle stalled and the service engine warning indicator illuminated. The contact was able to restart the vehicle after several attempts. The vehicle was taken to an independent mechanic where it was diagnosed that the camshaft position sensor failed and needed replacement. The vehicle was not repaired. The dealer was not contacted. The manufacturer was made aware of the failure and informed the contact that the VIN was not included in the federal safety agency campaign number: 03v455000 (engine and engine cooling). The failure mileage was approximately 150,000.
Tamara recalled my seatbelt light has been on for the last year. I were told by the infinity dealer that my car was not recall for the seatbelt. The seatbelt warning light stays on constantly in the navigation system and a little blanking icon. I am told by the dealer that I am responsible for repairs
Tl* the contact owns a 2003 infiniti q45. While driving various speeds, the engine stalled without warning and all power was lost. After several attempts, the vehicle was able to restart. The failure recurred randomly. The vehicle was taken to a dealer where the failure could not be determined. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 61,000. Updated 11/29/16*lj the consumer has since traded the vehicle. Updated 12/06/16.
Start car first thing in the am. Driving normal. Within 5 miles engine shuts off without warning. Loose all power. No code appears. Auto will not start. Finally starts after 5 or 6 tries. This problem has continued to occur every two or three days over the last six months. But auto starts immediately after. Auto and transmission are not performing properly. Now the engine stall while driving is happening on a daily basis. Auto has been checked out at george harte infiniti, west haven, ct at least five times. Dealership claims they cannot address the problem because no error code appears. Other than this problem, this auto is in excellent condition and should perform satisfactorily for many years to come. There was a recall (infiniti r3021) that addressed these exact problems, but the dealer service manager claimed that this car was not included. This problem is a serious safety hazard and there should be some way this can be fixed. Similar, if not exact, complaints for this exact model infiniti have been posted on the internet with owners indicating outrageous frustration with the infiniti manufacturer. When there are multiple complaints indicating exact problems, the fault certainly lays with the manufacturer. Is there something that can be done?
I own a 2003 infinity q45 and without warning this vehicle stalls where ever it wants at a light while you driving on a major highway on a major street no warning what so ever and infinity is aware of the problem but they only want to help certain VIN numbers. I took my family skiing to scranton pa and on interstate i80 the car stall without warning my entire family could have been killed. Please do something about this is a big issue and before someone gets hurt or killed someone should help.
Tl* the contact owns a 2003 infiniti q45. The contact stated that while driving at 30 MPH, a noise emitted from the front of the vehicle. The vehicle was taken to a dealer. The technician diagnosed that the fan belt and power steering belt needed to be replaced. The vehicle was repaired. In addition, three months later, the vehicle failed to start. The vehicle was taken back to the dealer. The vehicle was not diagnosed or repaired. The failure recurred on numerous occasions. The manufacturer was not notified of the failure. The failure mileage was 92,000. The VIN was unavailable.
Tl* the contact owns a 2003 infiniti q45. The contact stated that while driving 35 MPH, the steering wheel seized and there was a sudden loss of power. The vehicle was able to restart and resumed to normal. The failure occurred on three occasions. The dealer repaired the vehicle but the failure recurred. The manufacturer was not made aware of the failure. The failure mileage was 80,000 and the current mileage was 97,000.
I have a 2003 q45 and the car has shut off while driving several times. There is has in the car. I get it maintenance regularly. Its shut off while driving on the highway putting my family at risk. Its not safe to drive. After doing online searches I determined that a lot of people are having this same issue with this make and model. Please research this issue because I am terrified to drive this car. If there is an issue with electronic chip, infiniti should have to replace it. Thank you
Bought 2003 q 45 in spring 2007, still under warranty. June 2009 at 79,000 miles the engine was replaced (under warranty). 6/30/09, 80,081 miles car problem with no acceleration and service engine and cruise control light coming on. Problem didn't reoccur until june 2012 when engine suddenly cut off while driving. Would restart in neutral but in a week or so it did it again on the interstate at about 55. Fortunately was in right lane and could get to emergency lane before someone ran into me. Car restarted. Continued like this until 6/29/12 when repaired, only it continued to stop and the cruise control/traction lights would come on and car would suddenly stop and then surge forward. 8/11/12 serviced for same problem. 8/14/12 same thing, car stopped then surged, then the engine cut off and lost steering/brakes. Infiniti service again, this time installing new electronic control module ($ 1600). The dealer kept this car for several days and a mechanic drove it until it happened several times. The mechanic or someone at infiniti dealer told me it was a "death trap" and it is. A few weeks later going around a roundabout, the engine turned off and lost steering. Put in neutral and restarted. Couple of months later, engine turned off while driving. Friday june 7, 2013 I pulled onto busy highway, drove a mile and engine suddenly stopped. Before I could get in neutral to restart, a dump truck nearly rear-ended me. Got it restarted, then the cruise control light came on, car stopped again and then surged forward. I have contacted infiniti and internet searched. There were many infinitis with this problem in the years 2002-2003, though roswell infiniti said there were no recalls for this problem on any infiniti yesterday. This is a very dangerous situation, and infiniti acts like they know nothing about this problem.
Compare the 2003 Infiniti Q45
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Questions about the 2003 Infiniti Q45
Is the 2003 Infiniti Q45 reliable?
Owners have filed 12 complaints about the 2003 Infiniti Q45, 1.7 times a typical Q45 model year.
What is the most common problem with the 2003 Infiniti Q45?
Engine and cooling, with 7 complaints, typically around 94,000 miles. Next is electrical (3).
How many recalls does the 2003 Infiniti Q45 have?
1 recall, covering air bags.
What gas mileage does the 2003 Infiniti Q45 get?
Official estimates for the 2003 Infiniti Q45 range from 18 mpg combined. The most efficient version (4.5L 8-cyl, RWD) gets 16 city and 22 highway.
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