Nissan Infiniti 1999: Common Issues & Fixes

Hey car enthusiasts! Today, we're diving deep into a classic: the 1999 Nissan Infiniti. If you're a proud owner of this vintage beauty, or maybe you're considering buying one, then you're in the right place. We're going to break down some of the most common problems that owners face, and, importantly, how to fix them. Think of this as your go-to guide for keeping your 1999 Nissan Infiniti running smoothly and looking sharp. Let's get started!

Understanding the 1999 Nissan Infiniti

Before we jump into the nitty-gritty, let's take a moment to appreciate the 1999 Nissan Infiniti. This was a pivotal year for the brand, offering a blend of luxury and performance that was pretty impressive for its time. You had a choice of different models, each with its own quirks and charms. The Infiniti G20 was a compact sedan, the Infiniti I30 offered a bit more space and comfort, and the Infiniti Q45 was the flagship, loaded with features and power. The Infiniti QX4 was also a solid SUV choice in this lineup. Knowing which model you have is the first step in understanding the specific issues you might encounter. Each model had its strengths and weaknesses, so the problems you face could vary depending on which one you drive. It's like, if you've got a G20, you might be dealing with something different than someone with a Q45. But the good news is that many of the core issues are shared across the board, so this guide should be helpful no matter which Infiniti you're rocking. Whether you're a seasoned mechanic or just a car enthusiast, this guide will provide valuable insights into the common problems and how to get them fixed. Remember, taking care of your car is an investment, so let's make sure you're well-equipped to keep your 1999 Nissan Infiniti in top shape! And hey, if you're not afraid of getting your hands dirty, you'll be able to save a lot of money by doing some of the repairs yourself. So, are you ready to learn about the issues that often plague this classic car? Let's begin the deep dive into the 1999 Nissan Infiniti!

Engine Troubles: A Deep Dive

Alright, let's talk about the heart of your Infiniti: the engine. Engine problems can be some of the most frustrating and costly issues you'll face. In the 1999 models, you'll find different engines depending on the model. For instance, the G20 often had a 2.0-liter inline-four, while the I30 might have a 3.0-liter V6. The Q45 usually sported a powerful V8. Each engine has its own set of potential problems. One of the most common issues across these engines is the potential for oil leaks. This is especially true as these cars get older, and seals and gaskets start to degrade. Keep an eye out for oil stains under your car. Check your oil level regularly, and if you notice a drop, it's time to investigate. Another common issue is with the ignition system, specifically the ignition coils. Over time, these coils can fail, leading to misfires, rough idling, and reduced performance. If you notice your engine running poorly, check your spark plugs and coils. Replacing them can often solve the problem. Overheating is another area to watch out for. This can be caused by a variety of issues, from a faulty water pump to a clogged radiator. Keep an eye on your temperature gauge, and if it starts to climb, pull over and investigate immediately. Ignoring overheating can lead to serious engine damage. The 1999 Infiniti models, as they age, might also experience issues with sensors, like the oxygen sensor or the mass airflow sensor. A faulty sensor can throw off your engine's performance and fuel efficiency. If your check engine light comes on, it's a good idea to get your car scanned to identify any potential sensor problems. Regular maintenance, such as changing your oil and coolant, will go a long way in preventing many of these engine problems. Let’s not forget the importance of replacing your timing belt at the recommended intervals, as this is critical to avoid catastrophic engine damage. You will also be looking to replace belts and hoses. Your car will thank you for this!

Transmission Woes and Solutions

Next up, let's tackle the transmission. This is another area where problems can be both annoying and expensive. The 1999 Nissan Infiniti models typically came with either automatic or manual transmissions, depending on the model and trim. Automatic transmissions, in particular, can be prone to issues as the car ages. One common problem is slipping gears. This happens when the transmission fails to engage the gears properly, causing the engine to rev without a corresponding increase in speed. If you notice this, it could be due to low transmission fluid, worn clutches, or a more serious internal problem. Another issue to watch out for is harsh shifting. This is when the transmission shifts gears abruptly, causing a jolt or a clunk. This can be caused by several factors, including a faulty valve body or worn-out transmission mounts. Transmission fluid leaks are another concern. Check under your car for red fluid (transmission fluid is often red) and if you see any, get it checked out. Low fluid levels can lead to serious transmission damage. For manual transmissions, you might encounter issues like difficulty shifting gears or a clutch that fails to disengage properly. Clutch problems can often be traced back to a worn-out clutch disc, pressure plate, or release bearing. Regular transmission maintenance is critical. This includes changing your transmission fluid at the recommended intervals. Make sure you use the correct type of fluid for your specific transmission, as using the wrong fluid can cause damage. Also, keep an eye on your transmission for any signs of trouble, like unusual noises or changes in performance. Addressing transmission problems early can save you a lot of money and headaches down the road. It's also important to remember that driving habits can affect your transmission's lifespan. Avoid harsh acceleration and deceleration, and don't ride the clutch if you have a manual transmission. Your transmission will thank you for it!

Electrical System Glitches

Now, let's shed some light on the electrical system of your 1999 Nissan Infiniti. Electrical issues can be tricky to diagnose, but they can cause a wide range of problems, from minor inconveniences to major malfunctions. One common problem in older cars is the degradation of wiring and connectors. Over time, wires can become brittle and crack, and connectors can corrode, leading to shorts, open circuits, and intermittent problems. Keep an eye out for any unusual electrical behavior, such as flickering lights, non-functioning accessories, or a car that won't start. The battery is another area of concern. Batteries have a limited lifespan, and as they age, they can lose their ability to hold a charge. If your car is slow to start, or if the battery keeps dying, it might be time for a replacement. Make sure your battery terminals are clean and free of corrosion, as this can interfere with the flow of electricity. Fuses are another critical component of the electrical system. A blown fuse can shut down an entire circuit, leaving you with a non-functioning accessory. Keep a spare set of fuses in your car, and consult your owner's manual to identify the correct fuse for each circuit. You might encounter issues with the car's computer system, known as the ECU or ECM. These computers control many of the car's functions, and if they malfunction, it can lead to all sorts of problems. If you suspect an ECU issue, it's best to have a professional diagnose the problem. The 1999 models may also experience problems with their alternators. An alternator generates power for the car’s electrical system and charges the battery. If your alternator fails, your car will eventually die. The car's dashboard lights and gauges are another area to keep an eye on. Issues with these can indicate problems with sensors or other components. If you notice a warning light or an unusual reading on a gauge, it's important to investigate. Regular maintenance and careful observation can help you catch electrical problems early and prevent them from becoming major headaches.

Suspension and Steering Troubles

Let's get into the suspension and steering systems of the 1999 Nissan Infiniti. These systems are crucial for ride quality, handling, and safety. Over time, components in these systems can wear out, leading to various issues. A common problem is worn suspension components, such as shocks, struts, and bushings. These components absorb bumps and vibrations, and when they wear out, the ride quality can suffer. You might experience a bouncy ride, excessive noise, or a feeling that your car is unstable. You'll likely need to replace these components eventually, especially if you're driving on rough roads. Another issue to watch out for is steering problems. This includes issues like steering wheel vibration, difficulty steering, or unusual noises when turning. These problems can be caused by worn tie rods, ball joints, or a failing power steering pump. The power steering system itself can be a source of problems. Leaks in the power steering lines or a failing pump can lead to a loss of power assist, making the steering heavy and difficult. Regularly check your power steering fluid level and look for any signs of leaks. Alignment issues are also common. Hitting potholes or bumps can knock your car out of alignment, causing uneven tire wear and pulling to one side. If your car feels like it's pulling to one side, or if your tires are wearing unevenly, it's time for an alignment. The wheels and tires themselves can cause problems. Make sure your tires are properly inflated and that they have adequate tread. Worn tires can reduce handling and increase the risk of accidents. Regularly check your tire pressure and inspect your tires for any signs of damage. Regular maintenance and inspection are key to keeping your suspension and steering systems in good shape. This includes getting your car aligned, checking your tire pressure, and inspecting suspension components for wear and tear. Addressing these problems early can improve your car's ride quality, handling, and safety.

Interior and Exterior Concerns

Finally, let's talk about the interior and exterior of your 1999 Nissan Infiniti. While these issues might not be as critical as engine or transmission problems, they can still impact your car's appearance, comfort, and resale value. Inside the car, you might encounter issues with the interior trim, such as cracked dashboards, worn seats, or malfunctioning power windows. These problems are often due to age and wear. You may have to deal with cracking or peeling from the sun damage. Exterior, you might notice paint problems. Paint can fade, chip, or peel over time, especially if the car is exposed to the elements. Regular waxing and detailing can help protect your car's paint. You might also encounter issues with lights, such as burnt-out headlights or taillights. Make sure all your lights are working properly, as they are critical for safety. You might see issues with rust, which is more likely to develop in certain climates or if the car has been exposed to salt or other corrosive materials. Keep an eye out for rust spots and address them promptly to prevent them from spreading. Air conditioning and heating systems may develop problems over time. You might experience a loss of cooling or heating, or a musty smell from the vents. A regular inspection of these systems, including the replacement of filters, can help keep them in good working order. Regular maintenance, such as cleaning and detailing, can help keep your car looking its best. Addressing these cosmetic issues can improve your car's appearance and help retain its value. Plus, a clean and well-maintained car is just more enjoyable to drive. Make sure the body is in good condition, and that all parts are fitted properly. This is especially important for the older models!

Conclusion: Keeping Your 1999 Nissan Infiniti Alive

So, there you have it, folks! A comprehensive look at the common problems and solutions for your 1999 Nissan Infiniti. Remember, owning a classic car is a labor of love. These cars were built to last, but they require a little extra care and attention as they age. By knowing the common issues and how to address them, you can keep your Infiniti running smoothly and looking great for years to come. Regular maintenance, proactive repairs, and a little bit of DIY spirit can go a long way. And hey, don't be afraid to ask for help from fellow Infiniti enthusiasts or a trusted mechanic when you need it. Driving a 1999 Nissan Infiniti is a unique experience. With a little care and attention, you can keep your classic car on the road and enjoy it for many years to come. Happy driving!