2009 INFINITI M35
The 2009 Infiniti M35 is a mid-size luxury sedan known for its blend of performance and comfort. It came with two engine options: a 3.5L V6 and a 4.5L V8. The 3.5L V6 engine produced around 270 horsepower and 258 lb-ft of torque. Both engines were paired with a 5-speed automatic transmission. Owners generally appreciate the M35’s stylish design, comfortable interior, and strong acceleration. Common dislikes include the dated technology, fuel economy, and some reliability concerns, especially as the cars age.
Engine
3.5L V6 (VQ35HR)
- Camshaft Position Sensor Failure
- Description/Symptoms: The engine may experience rough idling, stalling, reduced power, and the check engine light may illuminate. Diagnostic codes P0340 and P0345 are commonly associated.
- Solution: Replacement of the faulty camshaft position sensor(s).
- Estimated Cost to Fix: $150 - $300+
- Recalls: None Found
- Valve Cover Gasket Leaks
- Description/Symptoms: Oil leaks around the valve covers, often dripping onto the exhaust manifold causing a burning smell. Low oil levels and visible oil accumulation are also signs.
- Solution: Replacement of the valve cover gaskets.
- Estimated Cost to Fix: $300 - $600+
- Recalls: None Found
4.5L V8 (VK45DE)
- Timing Chain Tensioner Failure
- Description/Symptoms: Rattling noise from the engine, especially on cold start. Can lead to poor engine performance and potential engine damage if not addressed.
- Solution: Replacement of the timing chain tensioners and potentially the timing chain itself if worn.
- Estimated Cost to Fix: $800 - $1500+
- Recalls: None Found
- Oil Consumption
- Description/Symptoms: Noticeable decrease in oil level between oil changes, potentially requiring frequent top-offs. Blue smoke from the exhaust may also be present.
- Solution: The root cause can vary. Piston rings or valve stem seals may be worn. Replacement of the affected components, or in severe cases, engine overhaul or replacement.
- Estimated Cost to Fix: $500 - $4000+ (depending on the cause and extent of repair)
- Recalls: None Found
Transmission
5-Speed Automatic Transmission (RE5R05A)
- Valve Body Issues
- Description/Symptoms: Harsh shifting, slipping between gears, delayed engagement, and difficulty shifting into certain gears.
- Solution: Replacement or rebuild of the valve body. In some cases, a transmission fluid flush and software update might temporarily alleviate the issue.
- Estimated Cost to Fix: $500 - $1500+
- Recalls: None Found
- Torque Converter Failure
- Description/Symptoms: Shuddering or vibration at highway speeds, especially under light acceleration. Possible stalling or difficulty engaging gears.
- Solution: Replacement of the torque converter.
- Estimated Cost to Fix: $800 - $1800+
- Recalls: None Found
Suspension
- Lower Control Arm Bushing Wear
- Description/Symptoms: Clunking or rattling noise from the front suspension, especially when going over bumps. Uneven tire wear and vague steering feel.
- Solution: Replacement of the lower control arm bushings, or the entire lower control arm assembly.
- Estimated Cost to Fix: $300 - $800+ (per side)
- Recalls: None Found
- Shock Absorber Failure
- Description/Symptoms: Bouncy ride, excessive body roll during cornering, and longer stopping distances. Visible leaks from the shock absorber.
- Solution: Replacement of the shock absorbers.
- Estimated Cost to Fix: $200 - $600+ (per pair)
- Recalls: None Found
Electrical
- Battery Drain
- Description/Symptoms: Battery drains overnight or within a short period of time, leading to starting issues.
- Solution: Identifying and repairing the parasitic draw causing the battery drain (common culprits include aftermarket accessories, faulty relays, or wiring issues).
- Estimated Cost to Fix: $100 - $500+ (depending on the complexity of the issue)
- Recalls: None Found
- Navigation/Infotainment Screen Failure
- Description/Symptoms: Blank screen, distorted display, or complete failure of the navigation/infotainment system.
- Solution: Replacement of the screen or the entire navigation/infotainment unit.
- Estimated Cost to Fix: $300 - $1000+
- Recalls: None Found
Exterior
- Headlight Condensation
- Description/Symptoms: Moisture buildup inside the headlight housing, reducing headlight effectiveness and potentially damaging the bulbs.
- Solution: Replacing the headlight housing or attempting to reseal the existing housing (not always effective).
- Estimated Cost to Fix: $200 - $800+ (per headlight)
- Recalls: None Found
Interior
- Power Seat Motor Failure
- Description/Symptoms: Seat unable to move in one or more directions. Grinding noises may be heard from the seat motor.
- Solution: Replacement of the faulty seat motor.
- Estimated Cost to Fix: $200 - $500+ (per motor)
- Recalls: None Found
- Sunroof Issues
- Description/Symptoms: Sunroof failing to open or close properly, getting stuck, or making unusual noises.
- Solution: Cleaning and lubricating the sunroof tracks, or replacing the sunroof motor or regulator.
- Estimated Cost to Fix: $200 - $800+
- Recalls: None Found
Summary
The 2009 Infiniti M35, while offering a luxurious experience, has some common issues as it ages. The most concerning problems relate to the engine (timing chain, oil consumption) and transmission (valve body). Suspension components such as control arm bushings and shock absorbers are also prone to wear. Electrical issues, interior issues, and exterior issues can also occur. Repair costs can range from a few hundred dollars for minor repairs to several thousand dollars for major engine or transmission work. Potential buyers should have a pre-purchase inspection performed by a qualified mechanic to identify any existing or potential problems.