There are some cars that simply transcend their era, becoming legends in their own right. For many of us, the 99 Honda Civic Si Hatchback, known affectionately by enthusiasts as the EK9 (or more precisely, the US market EM1 coupe often gets the Si badge, while the EK9 is the JDM Type R hatch – but the spirit is the same, and the US market ’99 Si is often what people are thinking of for accessible performance), holds a special place in automotive history. It’s not just a car; it’s a statement of performance, reliability, and sheer driving joy.
Whether you’re an everyday car owner looking for a reliable project, a weekend DIYer craving a rewarding challenge, or an off-road enthusiast (who appreciates a solid platform, even if this Si stays on the tarmac), understanding this iconic machine is key. This comprehensive 99 Honda Civic Si Hatchback guide is designed to arm you with the knowledge you need to buy smart, maintain effectively, troubleshoot confidently, and even upgrade your Si for maximum enjoyment.
We promise to deliver expert insights and actionable advice, ensuring your journey with this legendary Honda is as smooth and exhilarating as possible. By the end of this article, you’ll have a clear roadmap for everything from basic care to advanced performance modifications.
The Legend of the 99 Honda Civic Si Hatchback: Why It Still Matters Today
The 99 Honda Civic Si Hatchback (or its coupe counterpart, the EM1, which is the actual US Si model for ’99 and ’00) isn’t just a nostalgic relic; it’s a testament to Honda’s engineering prowess. Its reputation for being lightweight, agile, and incredibly fun to drive has only grown over time. These cars offer an unparalleled driving experience, especially for those who appreciate a naturally aspirated, high-revving engine.
The benefits of owning a 99 Honda Civic Si Hatchback extend beyond just performance. They’re known for their impressive fuel efficiency, legendary reliability (when properly maintained), and a vibrant aftermarket support scene. It’s a car that truly connects with the driver, offering a visceral experience often missing in modern vehicles.
Unpacking the B16A2: VTEC Power Explained
At the heart of the US-spec 1999-2000 Honda Civic Si (EM1 coupe) is the legendary B16A2 engine. This 1.6-liter DOHC VTEC engine is a marvel of engineering, delivering 160 horsepower at a screaming 7,600 RPM. VTEC, or Variable Valve Timing and Lift Electronic Control, is Honda’s signature technology that allows the engine to have two distinct cam profiles.
Below a certain RPM, the engine uses a milder cam lobe for better fuel economy and low-end torque. Once VTEC engages (around 5,500 RPM in the B16A2), a more aggressive cam lobe takes over, dramatically increasing valve lift and duration for maximum power. This dual personality is what makes the B16A2 so exciting and unique.
Timeless Design and Practicality
While the focus is often on performance, the design of the 99 Honda Civic Si is also a major draw. Its clean lines and compact dimensions give it a timeless appeal. Despite its sporty nature, it remains a practical daily driver, offering decent cargo space (especially if you consider the hatchbacks of this generation) and comfortable seating.
The interior is straightforward and driver-focused, making it easy to live with. This blend of practicality, style, and performance is a significant reason why these cars continue to be highly sought after.
Buying a 99 Honda Civic Si Hatchback: What to Look For
Finding a clean 99 Honda Civic Si Hatchback (or EM1 coupe) today can be a challenge, but it’s a rewarding hunt. When you’re in the market, a thorough inspection is crucial. Don’t rush the process; take your time and bring a friend with some automotive know-how if possible.
Many of these cars have been modified, raced, or simply neglected over the years. Your goal is to find one that has been cared for, or at least one with issues you’re prepared to tackle. Here are some critical points to inspect.
Essential Pre-Purchase Inspection Points
Before you even start the engine, do a walk-around and visual inspection. Look for consistent panel gaps, which can indicate previous accident damage. Check the paint for overspray, which also suggests repairs.
- Chassis & Frame: Inspect the frame rails, especially under the car, for bends, cracks, or signs of repair. This is paramount for safety and structural integrity.
- Suspension: Look for worn bushings, leaky shocks, or aftermarket components that might be poorly installed. Bounce each corner of the car; it should rebound once or twice, not several times.
- Brakes: Check the brake pads and rotors. Uneven wear or deep grooves suggest issues. The Si came with four-wheel disc brakes, a significant upgrade.
- Tires: Look for even tread wear. Uneven wear can indicate alignment problems or worn suspension components.
Rust, Electrical, and Transmission Checks
These older Hondas are susceptible to certain issues. Knowing where to look can save you a lot of headaches and money down the road.
- Rust: This is a major concern. Pay close attention to the rear quarter panels, rocker panels, subframe, and especially the strut towers. Rust can quickly turn a good deal into a money pit.
- Electrical System: Check all lights, windows, power locks, and the sunroof (if equipped). Honda wiring harnesses are generally robust, but aftermarket alarm systems or poorly installed stereos can lead to gremlins. Bring an OBD-II scanner to check for stored codes, even if the Check Engine Light isn’t on.
- Transmission: The B-series transmission is generally strong, but listen for grinding when shifting, especially into 2nd and 3rd gear. This often indicates worn synchros, a common problem with older Hondas. Test drive the car and try shifting quickly and slowly.
- Engine Bay: Look for signs of oil leaks (valve cover, oil pan, VTEC solenoid), coolant leaks, and any suspicious wiring. A clean engine bay can be a good sign, but sometimes it’s too clean, hiding issues.
Essential Maintenance and Care Guide for Your 99 Honda Civic Si Hatchback
Owning a 99 Honda Civic Si Hatchback is a commitment to proper care. Regular maintenance is not just about keeping it running; it’s about preserving its performance and longevity. This 99 Honda Civic Si Hatchback care guide will help you keep your legend in top shape.
Adhering to a strict maintenance schedule and using quality parts are the best practices for sustainable 99 Honda Civic Si Hatchback ownership. Many tasks are well within the scope of a DIY mechanic.
VTEC System TLC: Oil Changes and Valve Adjustments
The B16A2 engine thrives on fresh, clean oil. It’s the lifeblood of the VTEC system. We recommend using a high-quality synthetic 5W-30 oil and changing it every 3,000-5,000 miles, along with a new oil filter. Don’t skimp on oil changes; dirty oil can clog VTEC solenoids and cause premature wear.
Another crucial maintenance item for the B-series engine is regular valve adjustments. Over time, valve clearances can tighten or loosen, affecting performance and potentially causing damage. Aim for a valve adjustment every 30,000-60,000 miles. This is a precise job requiring a feeler gauge set and patience, but it’s a skill any serious DIYer can learn.
Cooling System Vigilance
Overheating can quickly destroy an engine. The cooling system in your 99 Honda Civic Si Hatchback needs consistent attention. Regularly check your coolant level in both the radiator and the overflow reservoir. Look for leaks around hoses, the radiator, and the water pump.
Replace your coolant every 2-3 years or 30,000 miles with a Honda-specific or equivalent silicate-free coolant. Consider replacing the thermostat and radiator cap every 5 years as preventative maintenance. A healthy cooling system is vital, especially if you plan any performance driving.
Brake and Suspension Overhaul
Your Si’s handling and stopping power are key to its fun factor. Inspect your brakes regularly. Check pad thickness and rotor condition. Replace worn components promptly. Bleeding your brake lines every 2-3 years with fresh DOT3 or DOT4 fluid will keep your pedal firm and responsive.
For the suspension, pay attention to any clunking, creaking, or excessive body roll. Worn bushings (especially in the control arms), ball joints, and tie rod ends can severely degrade handling and safety. Replacing these components, even with OEM-style parts, can make a significant difference in how your Si feels on the road.
Troubleshooting Common Problems with Your 99 Honda Civic Si Hatchback
Even with the best care, your 99 Honda Civic Si Hatchback might develop issues. Knowing how to diagnose and address common problems can save you money and keep you on the road. Here are some tips for how to 99 Honda Civic Si Hatchback owners can troubleshoot effectively.
Always prioritize safety. If you’re unsure, consult a professional. But many diagnostic steps are simple and empowering for the DIY mechanic.
Dealing with Check Engine Lights
The Check Engine Light (CEL) is your car’s way of telling you something is wrong. The first step is to connect an OBD-II scanner to read the diagnostic trouble codes (DTCs). Common codes on a 99 Honda Civic Si Hatchback might relate to:
- Oxygen Sensors: These wear out over time and can cause poor fuel economy or a rough idle.
- EVAP System Leaks: A loose gas cap is the simplest fix, but vacuum lines and charcoal canisters can also fail.
- Misfires: Often caused by old spark plugs, faulty ignition coils, or clogged fuel injectors.
Once you have the code, research it specifically for your Honda. Don’t just replace parts based on the code; use it as a starting point for further diagnosis.
Rough Idles and Misfires
A rough idle or engine misfire can be frustrating. Here’s a troubleshooting checklist:
- Spark Plugs & Wires: Check the condition of your spark plugs. Replace them with quality NGK plugs if they’re old or fouled. Inspect the spark plug wires for cracks or damage.
- Distributor: The distributor cap and rotor are wear items. Replace them if corroded or cracked. Also, check the internal igniter (coil) within the distributor, which can fail.
- Fuel System: A clogged fuel filter or dirty fuel injectors can cause misfires. Consider running a fuel system cleaner or testing injector resistance.
- Vacuum Leaks: Hoses degrade over time. Listen for a whistling sound, or spray carb cleaner around vacuum lines (if the idle changes, you’ve found a leak).
- Idle Air Control Valve (IACV): A dirty IACV can cause erratic idle. Cleaning it with throttle body cleaner can often resolve the issue.
Transmission Grinds and Shifting Issues
As mentioned during the buying guide, worn synchros are common in B-series transmissions, leading to grinding, especially in 2nd and 3rd gear. While rebuilding the transmission is the ultimate fix, here are some things to check first:
- Transmission Fluid: Ensure you’re using the correct Honda MTF (Manual Transmission Fluid) and that the level is correct. Old or incorrect fluid can exacerbate shifting issues.
- Clutch Adjustment: A clutch that isn’t fully disengaging can cause grinding. Check the pedal free play and adjust it according to the service manual.
- Clutch Master/Slave Cylinder: Leaks or internal wear in these hydraulic components can prevent proper clutch disengagement.
If grinding persists after these checks, it’s likely a mechanical issue within the transmission. At this point, you might consider a professional transmission rebuild or replacement.
Performance Mods & Setup for Your 99 Honda Civic Si Hatchback
The 99 Honda Civic Si Hatchback is a fantastic platform for performance modifications. Whether you’re aiming for spirited street driving or occasional track days, a thoughtful approach to upgrades will yield the best results. Remember, performance isn’t just about horsepower; it’s about balance.
While “off-road setup” isn’t typically associated with an Si, the principles of enhancing durability, handling, and power translate directly to street and track performance. Focus on improving what’s already great.
Bolt-Ons for More Power
Starting with bolt-on modifications is a common and effective way to extract more power from your B16A2. These upgrades are often reversible and don’t require internal engine work.
- Intake System: A cold air intake (CAI) can help the engine breathe better, providing a slight power bump and a more aggressive intake sound.
- Exhaust System: A quality header, high-flow catalytic converter, and cat-back exhaust system can improve exhaust flow, freeing up a few horsepower and enhancing the exhaust note. Look for systems designed for the B-series engine to ensure proper fitment and performance.
- Engine Management: For more significant gains, especially with multiple bolt-ons, an engine management system (like Hondata S300 or similar) allows for custom tuning. This optimizes fuel and ignition timing for your specific modifications, unlocking true potential. This is where professional tuning becomes crucial.
Suspension Upgrades for Handling Prowess
The Si already handles well, but you can elevate it significantly. These tips for your 99 Honda Civic Si Hatchback will transform its cornering abilities:
- Coilovers or Lowering Springs & Shocks: Upgrading to a quality coilover system or a matched set of lowering springs and performance shocks will reduce body roll, lower the center of gravity, and improve responsiveness. Choose reputable brands that offer adjustable damping for street and track flexibility.
- Sway Bars: Larger front and rear sway bars (anti-roll bars) further reduce body roll, allowing the car to stay flatter through corners. Adjustable sway bars offer fine-tuning capabilities.
- Bushings: Replacing old, soft rubber bushings with stiffer polyurethane or spherical bearings (for track use) throughout the suspension can dramatically tighten up the car’s feel and responsiveness.
- Strut Tower Braces: Front and rear strut tower braces can stiffen the chassis, improving steering response and reducing flex.
Safety First: Brakes and Tires
More power and better handling mean you need superior stopping power and grip. These are non-negotiable safety upgrades.
- Performance Brake Pads & Rotors: Upgrade to higher-performance brake pads (e.g., EBC Redstuff, Hawk HPS) and slotted or drilled rotors for improved fade resistance and stopping power.
- Stainless Steel Brake Lines: These reduce brake pedal flex, providing a firmer, more consistent pedal feel.
- High-Performance Tires: This is arguably the most impactful handling upgrade. Invest in sticky summer performance tires. They are the only contact points with the road and will unlock the full potential of your suspension upgrades. Don’t compromise here.
- Proper Alignment: After any suspension work, get a professional alignment to ensure proper geometry, tire wear, and predictable handling.
Sustainable Ownership: Eco-Friendly 99 Honda Civic Si Hatchback Best Practices
Owning a classic like the 99 Honda Civic Si Hatchback doesn’t mean you can’t be environmentally conscious. Adopting sustainable 99 Honda Civic Si Hatchback and eco-friendly 99 Honda Civic Si Hatchback best practices benefits both your wallet and the planet.
Many simple habits and choices can make a big difference in reducing your car’s environmental footprint.
Fuel Efficiency Tips
The B16A2 is already relatively fuel-efficient for its performance, but you can optimize it further:
- Regular Maintenance: A well-maintained engine runs more efficiently. Keep up with oil changes, spark plug replacements, and air filter checks.
- Proper Tire Pressure: Underinflated tires increase rolling resistance and reduce fuel economy. Check your tire pressure regularly and keep it at the manufacturer’s recommended levels.
- Smooth Driving: Avoid aggressive acceleration and hard braking. Smooth, consistent driving uses less fuel. Anticipate traffic and coast when possible.
- Reduce Weight: Remove unnecessary items from your trunk or interior. Every extra pound reduces efficiency.
Responsible Fluid Disposal and Part Sourcing
Properly disposing of automotive fluids is crucial for environmental protection. Never pour used oil, coolant, or brake fluid down the drain or into the ground.
- Recycle Fluids: Most auto parts stores and many service centers accept used motor oil, coolant, and other fluids for recycling.
- Dispose of Parts Responsibly: When replacing parts, inquire if the old ones can be recycled (e.g., batteries, tires, catalytic converters). Consider sourcing used parts from salvage yards for some components, which extends their life and reduces demand for new manufacturing.
- Long-Lasting Parts: Invest in high-quality, durable replacement parts. They might cost more upfront but last longer, reducing waste and the frequency of replacements.
Frequently Asked Questions About the 99 Honda Civic Si Hatchback
Is the 99 Honda Civic Si a good first car?
While the 99 Honda Civic Si (EM1 coupe) is a fantastic car, its high-revving nature and potential for speed might make it less ideal for a brand-new driver. For someone with some driving experience and a responsible attitude towards performance, it can be a very rewarding first “enthusiast” car. It teaches good driving habits and basic mechanics.
How much horsepower does a stock 99 Honda Civic Si Hatchback have?
The US-spec 1999-2000 Honda Civic Si (EM1 coupe) came with the B16A2 engine, which produced 160 horsepower and 111 lb-ft of torque from the factory. The JDM EK9 Type R hatchback had the B16B engine, which made 185 horsepower.
Are parts still available for the 99 Honda Civic Si?
Yes, parts availability is one of the benefits of 99 Honda Civic Si Hatchback ownership. Many OEM parts are still available from Honda, and the aftermarket support is extensive, ranging from maintenance items to performance upgrades. Used parts are also plentiful due to the car’s popularity.
What’s the typical lifespan of a 99 Honda Civic Si engine?
With proper and consistent maintenance, including regular oil changes and valve adjustments, a B16A2 engine can easily last 200,000 to 300,000 miles or more. Neglect, however, can significantly shorten its lifespan. These engines are incredibly robust when cared for.
What are the common rust spots on a 99 Honda Civic Si?
Common rust spots include the rear quarter panels (especially around the wheel arches), rocker panels, the subframe, and sometimes the front and rear strut towers. Always check thoroughly, particularly if the car has spent its life in areas with harsh winters or coastal climates.
Embrace the Legend: Your Journey with the 99 Honda Civic Si
The 99 Honda Civic Si Hatchback (or its EM1 coupe sibling) is more than just a car; it’s an experience, a project, and a piece of automotive history that continues to inspire. By following this guide, you’re not just maintaining a vehicle; you’re preserving a legend and joining a community of passionate enthusiasts.
From understanding the roar of the VTEC to expertly tackling maintenance and carefully planning your performance upgrades, every step of your journey with this iconic Honda will be rewarding. Remember to always prioritize safety, use the right tools for the job, and don’t be afraid to get your hands dirty.
Embrace the DIY spirit, learn as you go, and enjoy every mile. Your 99 Honda Civic Si Hatchback has a story to tell, and you’re now equipped to write its next exciting chapter. Stay safe and stay comfortable!
- Honda Oil Filter – The Ultimate DIY Guide To Longevity & Performance - December 31, 2025
- Honda Engine Oil Filter – The Ultimate DIY Guide To Cleaner Oil - December 31, 2025
- 1996 Honda Civic Oil Filter – The Ultimate DIY Guide To Selection - December 31, 2025