1999 Nissan Infiniti: Common Issues And Fixes

Nov 8, 2025 by Admin 46 views

Hey car enthusiasts! Ever wondered about the quirks and features of the 1999 Nissan Infiniti? Well, you're in for a treat! Today, we're diving deep into the world of this classic car, exploring its common problems and how you can fix them. This guide is your ultimate companion for understanding the 1999 Nissan Infiniti, whether you're a proud owner, a potential buyer, or just a curious gearhead. Let's get started, shall we?

Overview of the 1999 Nissan Infiniti

The 1999 Nissan Infiniti models, particularly the G20, I30, and Q45, were known for their blend of luxury and performance. These cars were a hit back in the day, offering a premium driving experience that was a step above the competition. But like any car, the 1999 Nissan Infiniti had its share of issues. Before we jump into the nitty-gritty, let's take a quick look at each model.

The G20 was the entry-level sedan, prized for its sporty handling and compact size. It was a favorite among those who wanted a bit of luxury without breaking the bank. Then there's the I30, a mid-size sedan that offered a more spacious interior and a more refined ride. The I30 was designed to cater to those who desired a more comfortable and luxurious experience. Finally, the Q45 was the flagship sedan, boasting a powerful engine, a wealth of features, and a commanding presence on the road. The Q45 was all about luxury and performance, designed to compete with the best in the market. Each model had its strengths and weaknesses, but they all shared a common heritage of Nissan engineering and Infiniti luxury. Over time, these cars have shown some typical problems, which we will analyze to see how to solve them.

Now, let's explore some of the most common problems you might encounter with the 1999 Nissan Infiniti models, and how you can address them. This information will be invaluable whether you own one of these classics or are considering buying one. Knowing these potential issues will help you make informed decisions and keep your Infiniti running smoothly for years to come. Remember, proper maintenance and timely repairs are key to enjoying your classic Infiniti.

Common Problems and Solutions

Engine Issues

Engine problems are, unfortunately, a frequent concern with the 1999 Nissan Infiniti, specifically with models like the G20, I30, and Q45. One of the most common issues is oil consumption. You might notice your engine burning oil, which can lead to low oil levels and potential engine damage if not addressed. The main causes include worn valve seals and piston rings, which allow oil to seep into the combustion chamber. Also, internal engine oil leaks are frequent, especially on models with high mileage. Solutions: Regularly check your oil level and top it up as needed. If oil consumption is excessive, you might need to rebuild the engine, which can be costly. Consider using a thicker oil to help reduce consumption or adding an oil additive. Regular oil changes and using high-quality oil can also help mitigate this issue.

Another prevalent problem is engine misfires. This can be caused by various factors, including faulty spark plugs, ignition coils, or vacuum leaks. Misfires will cause rough engine running and reduced performance. Solutions: Inspect and replace spark plugs and ignition coils as necessary. Check for vacuum leaks by listening for hissing sounds or using a smoke test. A mechanic can diagnose the issue with an OBD-II scanner. Additionally, make sure the fuel injectors are clean and functioning correctly, as this can also cause misfires. These issues can often be resolved with routine maintenance and the replacement of worn parts.

Finally, some owners report idle problems. This can manifest as a rough idle, stalling, or inconsistent engine speed. Common causes include a dirty or faulty idle air control valve (IACV), a vacuum leak, or a faulty mass airflow sensor (MAF). Solutions: Clean the IACV, check for vacuum leaks, and clean or replace the MAF sensor. Use a diagnostic tool to check for error codes that might provide clues to the problem. Fixing these issues will significantly improve the overall engine performance and drivability of your 1999 Nissan Infiniti.

Transmission Problems

Transmission issues are a common headache in the 1999 Nissan Infiniti models. Transmission failure is a significant concern. This can manifest as slipping gears, harsh shifting, or complete transmission failure. The main causes include overheating, low fluid levels, and internal wear and tear. Solutions: Regularly check and maintain the transmission fluid levels, and change the fluid according to the manufacturer's recommendations. Avoid aggressive driving, which can overheat the transmission. If the transmission is failing, a rebuild or replacement may be necessary, which can be expensive. Catching the issue early can save you money, as you may be able to repair it instead of replacing it entirely.

Harsh shifting and slipping gears are also common. These can be caused by worn clutch packs, solenoid issues, or low transmission fluid. Solutions: Get your transmission fluid flushed and replaced regularly. If the problem persists, you might need to rebuild or replace the transmission. Regular maintenance is key to avoiding these issues. Also, consider the driving conditions; frequent stop-and-go traffic can accelerate the wear and tear on your transmission components.

Another related issue is transmission overheating. This can cause significant damage to internal components. Solutions: Ensure the transmission cooler is functioning correctly and is not blocked. Use a high-quality transmission fluid, and avoid excessive towing or heavy loads if your car is not equipped to handle them. Monitoring the transmission temperature can also help you avoid overheating problems.

Electrical Problems

Electrical issues can be frustrating and can affect various systems in your 1999 Nissan Infiniti. A common problem is electrical shorts. These can cause various issues, such as blown fuses, malfunctioning lights, and non-functional accessories. The main causes include damaged wiring, corroded connectors, and faulty components. Solutions: Inspect the wiring harness for damage or corrosion. Replace blown fuses and trace the source of the short. A skilled technician can use a multimeter to diagnose electrical problems accurately. Often, electrical problems are the result of wear and tear, and replacing the faulty components can resolve the issues quickly.

Problems with the car's electronics are also frequent. This includes issues with the instrument cluster, power windows, power locks, and the audio system. Solutions: Check the fuses, wiring, and connectors for any problems. Sometimes, a simple reset can resolve the issue. If the problem persists, you might need to replace the faulty components. Professional diagnostics can help to pinpoint the exact location of the issue. A common cause is wear and tear, and sometimes, simply replacing an old part can fix the problem. Always remember to disconnect the battery before working on electrical components.

Battery drain is another annoying issue. This can be caused by faulty relays, parasitic drains, or leaving lights or accessories on. Solutions: Use a multimeter to check for parasitic drain. Make sure all lights and accessories are turned off when the car is not in use. Replacing the battery and checking the alternator output can also help. Electrical problems often require careful troubleshooting, so it is best to consult with a qualified technician if you're not comfortable working with electrical systems.

Suspension and Steering Problems

Suspension and steering problems can significantly impact the driving experience of your 1999 Nissan Infiniti. Worn suspension components are a common issue. This includes worn shocks, struts, ball joints, and bushings. This can lead to a bumpy ride, poor handling, and unusual noises. Solutions: Inspect the suspension components for wear and tear. Replace worn parts as needed. A proper alignment is essential after replacing suspension components. Regular inspections can help catch these issues early before they become major problems. Also, consider the driving conditions, as rough roads can accelerate the wear and tear of suspension components.

Steering problems are also common, such as a loose or unresponsive steering feel. This can be caused by worn tie rod ends, a faulty steering rack, or a power steering pump issue. Solutions: Inspect the steering components for wear and tear. Replace any worn parts. Check the power steering fluid level and condition. A proper alignment is also essential. Regular maintenance and inspections can help to prevent these problems. If the steering feels heavy or unresponsive, it's best to have a mechanic inspect the system.

Unusual noises coming from the suspension are another symptom. This can include clunking, squeaking, or rattling sounds. Solutions: Identify the source of the noise. Inspect all suspension components for wear and tear. Replace any worn parts. Lubricate the bushings if necessary. Ignoring these noises can lead to more significant and expensive repairs down the road. Addressing these issues will significantly improve the handling and comfort of your classic Infiniti.

Maintenance Tips for Your 1999 Nissan Infiniti

To keep your 1999 Nissan Infiniti running smoothly and to minimize problems, proper maintenance is key. Here are some essential tips:

Regular Oil Changes: Change the oil and filter every 3,000 to 5,000 miles or as recommended by the manufacturer. Use high-quality oil to protect the engine. This is one of the most important things you can do to keep your Infiniti running great.
Fluid Checks: Regularly check and top off all fluids, including coolant, transmission fluid, brake fluid, and power steering fluid. Ensure you are using the correct fluids for your model.
Tire Maintenance: Regularly check tire pressure and tread depth. Rotate tires as recommended. Proper tire maintenance ensures safe and efficient driving. Replace tires when needed.
Brake Inspection: Have your brakes inspected regularly. Replace brake pads and rotors as needed. Ensure the brake system is functioning correctly for safety.
Tune-Ups: Perform regular tune-ups, including replacing spark plugs, air filters, and fuel filters. This improves engine performance and fuel efficiency.
Check Belts and Hoses: Inspect belts and hoses for cracks or wear. Replace them as needed to prevent breakdowns.
Regular Inspections: Have your car inspected regularly by a qualified mechanic. This can help identify potential problems before they become serious.

Following these tips will help extend the life of your 1999 Nissan Infiniti and keep it running in top condition.

Conclusion

Well, there you have it, guys! We've covered the common problems and solutions for the 1999 Nissan Infiniti. From engine and transmission issues to electrical and suspension problems, being informed can help you keep your Infiniti running smoothly for years to come. Remember, regular maintenance, timely repairs, and a little bit of care will keep your classic Infiniti a joy to own and drive. Whether you're a seasoned owner or a new enthusiast, we hope this guide has been helpful. Drive safe, and enjoy your classic Infiniti!