2006 Infiniti M35 Sedan Sport
Welcome, fellow 2006 Infiniti M35 Sport owner! This car is a fantastic blend of luxury and performance, but like any vehicle, it can experience its share of hiccups. This article aims to address some common problems you might encounter with your M35 Sport and provide practical solutions to get you back on the road smoothly.
Addressing Common Engine Issues
The heart of your M35 Sport is the VQ35DE engine, a reliable workhorse, but it's not immune to certain issues. Let's explore some of the more frequent ones.
Oil Consumption
One common concern, especially on higher-mileage M35s, is excessive oil consumption. This can be caused by worn piston rings or valve stem seals. Keep a close eye on your oil level and check for blueish smoke from the exhaust, particularly on startup or acceleration, as this is a telltale sign.
Solution: Unfortunately, the fix for worn piston rings or valve stem seals is often an engine rebuild or replacement. This is a significant repair. A compression test and leak-down test can help diagnose the severity of the issue. Expect to pay anywhere from $3,000 to $6,000 for a rebuild, or potentially more for a replacement engine. As a temporary measure, using a slightly thicker oil (e.g., switching from 5W-30 to 10W-30) might help reduce consumption, but it's not a long-term solution.
Timing Chain Issues
The VQ35DE uses a timing chain, which is generally more durable than a timing belt. However, the timing chain tensioners and guides can wear over time, leading to a rattling noise, especially on cold starts. Ignoring this can lead to catastrophic engine damage if the chain jumps a tooth.
Solution: Replacing the timing chain, tensioners, and guides is crucial. This is a labor-intensive job, so it's best left to a professional. The parts themselves aren't terribly expensive (around $200-$400 for a complete kit), but the labor can run between $800 and $1500. Early detection and repair can save you from far more costly repairs down the line. Listen carefully for any unusual rattling noises coming from the front of the engine.
Camshaft Position Sensor Failure
A faulty camshaft position sensor can cause rough idling, poor acceleration, and even a no-start condition. The check engine light will typically illuminate, and you'll likely see a code related to the camshaft position sensor when you scan the car.
Solution: Replacing the camshaft position sensor is a relatively straightforward repair. The sensor itself usually costs between $50 and $100. The job can be done with basic hand tools (socket set, wrench) and should take about an hour. Be sure to disconnect the negative battery terminal before starting. Consult a repair manual or online resources for the exact location of the sensor on your M35 Sport.
Addressing Transmission Concerns
The automatic transmission in the 2006 M35 Sport is generally reliable, but some issues can arise.
Rough Shifting or Slipping
Rough shifting or slippage between gears can indicate several problems, including low transmission fluid, worn clutches, or a faulty solenoid.
Solution: First, check the transmission fluid level. The procedure is outlined in your owner's manual and typically involves checking the level with the engine running and the transmission at operating temperature. If the fluid is low, add the correct type of fluid (consult your owner's manual). If the fluid is dark or smells burnt, a transmission fluid flush is recommended. If the problem persists after a fluid flush, it may indicate more serious internal damage, requiring a rebuild or replacement. A transmission rebuild can cost between $2,000 and $4,000, while a replacement can be even more expensive.
Torque Converter Issues
A failing torque converter can cause shuddering or vibration at low speeds, especially during acceleration. It can also lead to poor fuel economy.
Solution: Unfortunately, a torque converter replacement usually requires removing the transmission. Therefore, it’s often recommended to rebuild the transmission at the same time, as the labor costs are similar. Expect to pay between $1,500 and $3,000 for a torque converter replacement, depending on whether you rebuild the transmission simultaneously.
Electrical Gremlins
Like many modern cars, the 2006 M35 Sport relies heavily on electronics, which can sometimes cause frustrating problems.
Battery Drain
A common complaint is a parasitic battery drain, where the battery slowly discharges even when the car is off. This can be caused by a faulty module, a malfunctioning relay, or even a light that's staying on without you noticing.
Solution: Diagnosing a parasitic battery drain can be time-consuming. The easiest way to start is to use a multimeter to measure the current draw when the car is off. Ideally, the draw should be less than 50 milliamps. If it's higher, you'll need to start pulling fuses one at a time to isolate the circuit that's causing the drain. Once you've identified the circuit, you can further investigate the components within that circuit. This process can take several hours, and it's often best left to a professional. A shop might charge a few hours of labor for diagnosis alone.
ABS/Traction Control Issues
Problems with the ABS (Anti-lock Braking System) or traction control can manifest as warning lights on the dashboard, reduced braking performance, or the traction control system engaging unnecessarily.
Solution: The first step is to have the ABS system scanned for fault codes. This will help pinpoint the source of the problem, which could be anything from a faulty wheel speed sensor to a malfunctioning ABS module. Wheel speed sensors are relatively inexpensive and easy to replace. However, a faulty ABS module can be more costly to repair or replace, potentially running into the hundreds of dollars.
Suspension and Steering Woes (Sport Model Specific)
Being the "Sport" model, your M35 boasts a tighter suspension. Over time, this can lead to wear and tear on certain components.
Worn Bushings and Ball Joints
You might notice clunking noises when going over bumps, or imprecise steering, if your suspension bushings or ball joints are worn. These are common wear items on any car, but the Sport model's stiffer suspension can accelerate their deterioration.
Solution: A thorough inspection of the suspension components is crucial. Replacing worn bushings and ball joints is a common repair. Depending on the location and complexity, the cost can range from a few hundred dollars to over a thousand dollars, especially if multiple components need replacing. Consider replacing control arms as complete units, as pressing out and pressing in new bushings can be challenging without the right tools.
Power Steering Issues
The M35 Sport has a speed-sensitive power steering system. You might experience stiff steering at low speeds or a lack of assist at higher speeds if there's a problem with the power steering pump, rack, or related sensors.
Solution: Check the power steering fluid level first. If it's low, add the correct type of fluid. If the problem persists, inspect the power steering pump and rack for leaks. A faulty power steering pump can be replaced for a few hundred dollars, while a leaking or damaged power steering rack may require replacement or rebuild, which is a more expensive repair (ranging from $500 to $1000 or more). Also, have the power steering pressure sensor checked, as a faulty sensor can also cause steering issues.
General Maintenance Tips for Long-Term Reliability
Preventative maintenance is key to keeping your 2006 Infiniti M35 Sport running smoothly for years to come. Here are a few essential tips:
- Follow the recommended maintenance schedule: Consult your owner's manual for the recommended intervals for oil changes, filter replacements, spark plug replacement, and other essential services.
- Use high-quality fluids: Using the correct type of oil, transmission fluid, coolant, and brake fluid is crucial. Refer to your owner's manual for the specific requirements.
- Inspect your tires regularly: Check the tire pressure and tread depth regularly. Proper tire inflation improves fuel economy and handling, while adequate tread depth ensures safe braking.
- Address problems promptly: Don't ignore warning lights or unusual noises. Addressing problems early can prevent them from escalating into more costly repairs.
By staying proactive with maintenance and addressing issues promptly, you can continue to enjoy the performance and luxury of your 2006 Infiniti M35 Sport for many years to come. Remember, this article is intended as a general guide. Always consult a qualified mechanic for diagnosis and repairs, especially for complex issues.