Before starting any journey, it's vital to ensure your vehicle is roadworthy. This lesson, part of the 'Vehicle Safety Systems and Basic Mechanics' unit, covers the mandatory pre-drive safety checks (säkerhetskontroll) that every driver must know for the Swedish Category B theory exam.

Driving a vehicle is not just about mastering traffic rules and maneuvers; it also involves ensuring your vehicle is in a safe and roadworthy condition. In Sweden, this crucial responsibility is enshrined in law through what is known as the säkerhetskontroll (safety control). This lesson will guide you through the vital pre-drive checks required for Category B passenger cars, helping you understand their importance for your safety and the safety of other road users.
Regularly performing these basic maintenance checks can prevent mechanical failures that might lead to loss of control, reduced stopping ability, or visibility problems, all of which significantly increase the risk of accidents. By understanding and implementing these procedures, you will fulfill your legal obligations and contribute to a safer road environment.
Under Swedish traffic law, specifically Trafikförordning (1998:1276) 2 kap. 9 §, every driver has a clear legal duty: before starting the vehicle, you must ensure that it is in a condition that does not jeopardise traffic safety. This makes the säkerhetskontroll a mandatory part of preparing for any journey.
This legal framework aims to minimise preventable accidents caused by vehicle defects, placing the responsibility squarely on the driver as the "last line of defence." Failure to comply can result in fines and potential liability in the event of an accident. Therefore, a systematic pre-drive inspection is not merely a recommendation; it is a statutory obligation that underpins road safety in Sweden.
A säkerhetskontroll is a systematic, brief inspection, typically taking around five minutes. It should be performed before every journey, especially after a long idle period, before long trips, or when adverse weather conditions are expected. This section details the key components you must check.
Initial Walk-Around Inspection: Before even entering the car, walk around the vehicle. Look for any obvious damage, flat tires, fluid leaks, or objects caught under the car. Ensure all windows and mirrors are clean.
Check Tire Condition: Examine tire pressure and tread depth. Look for any signs of damage like bulges, cracks, or embedded objects.
Verify All Lights: Test all exterior and interior lights for functionality. This includes headlights (dipped and main beam), tail lights, brake lights, turn signals, reverse lights, and hazard warning lights.
Inspect Critical Fluid Levels: Check engine oil, coolant, brake fluid, and windshield washer fluid. Top up any fluids that are below the minimum recommended level.
Evaluate Windshield Wipers and Washer System: Ensure wiper blades are not cracked or stiff and clean the windshield effectively. Confirm the washer fluid reservoir is full and the nozzles spray correctly.
Check Seat Belts and Restraint Systems: Verify that all seat belts retract smoothly, latch securely, and show no signs of damage.
Dashboard Warnings: Once the ignition is on, ensure no critical warning lights remain illuminated after the initial self-check.
Tires are your vehicle's only contact with the road. Their condition directly impacts handling, braking, and fuel efficiency.
Tire pressure refers to the amount of air inside a tire, typically measured in bar or pounds per square inch (psi). The correct pressure, specified by your vehicle's manufacturer, is crucial for optimal performance. You can usually find these recommendations on a placard inside the driver's door jamb, in the glove compartment, or in the owner's manual.
This is the tire pressure measured after the vehicle has been stationary for at least three hours or has been driven for less than a few kilometres at moderate speed. It's the most accurate reading.
Why it matters: Incorrect tire pressure, whether too high or too low, can lead to uneven tire wear, reduced grip, longer braking distances, and increased fuel consumption. Under-inflated tires generate excessive heat, increasing the risk of a tire blow-out.
Always check your tire pressure when the tires are cold. If you must check them when warm (e.g., at a service station after driving), expect the pressure to be slightly higher, and adjust only if significantly over-inflated, rechecking when cold as soon as possible.
Tread depth is the vertical distance between the deepest part of the tire's tread groove and the top of the tread rubber. It is measured in millimetres (mm) and is essential for evacuating water and maintaining traction, especially on wet or icy surfaces.
Under Swedish law, the minimum legal tread depth for passenger cars is 1.6 mm across the entire tread width for all tires. However, for safe driving, particularly during winter conditions, a greater tread depth is highly recommended. For winter tires, a minimum of 3 mm is often advised.
How to check: A simple visual inspection is often insufficient. You should use a tread-depth gauge, which can be purchased cheaply. Many tires also have tread wear indicators (small bars embedded in the grooves) that become flush with the tread surface when the depth reaches the legal minimum.
Beyond pressure and depth, visually inspect the entire tire for cuts, bulges, cracks in the sidewall, or foreign objects (like nails or screws) embedded in the tread. Any significant damage warrants immediate attention from a professional.
Functional lights are critical for both seeing and being seen, especially in low light conditions, tunnels, or adverse weather. Vägmärkningsförordning (1998:254) 4 kap. 8-9 §§ mandates that all required lighting devices must be functional and correctly adjusted.
Headlights: Test both the dipped beam (low beam) for normal night driving and the main beam (high beam) for long-range illumination. Ensure they are clean and free of condensation.
Tail Lights: Verify that both rear tail lights illuminate when the headlights are on.
Brake Lights: Ask someone to observe or use a reflective surface to ensure all three brake lights (two main, one high-mounted) illuminate when you press the brake pedal.
Turn Signals: Check all four turn signals (front, rear, and side repeaters) by activating them individually and then as hazard warning lights (emergency flashers). Listen for the rhythmic clicking sound.
Reverse Lights: Ensure reverse lights illuminate when reverse gear is selected.
Fog Lights: If your vehicle is equipped with front and/or rear fog lights, check their operation. Remember that rear fog lights are very bright and should only be used when visibility is severely reduced (e.g., less than 50 metres).
License Plate Lights: Verify that the light illuminating your rear license plate is working.
Interior Dashboard Illumination: Briefly check that your dashboard lights are functioning.
Common Misunderstanding: Many modern cars have Daytime Running Lights (DRL) that automatically activate. While these are sufficient during daylight, they are not adequate for nighttime driving or in tunnels, as they often don't activate tail lights. Always switch to dipped beam in these situations to ensure full visibility of your vehicle.
Proper fluid levels are vital for your vehicle's mechanical reliability. Low levels can lead to severe damage or sudden system failures.
A lubricating fluid that reduces friction between moving engine parts, prevents wear, cools the engine, and cleans internal components.
Check your engine oil level using the dipstick. This should be done on a level surface when the engine is cold (or at least 10-15 minutes after it's been turned off to allow oil to drain back into the sump). The level should be between the "min" and "max" marks. If it's below "min," add the manufacturer-recommended type and grade of oil.
Coolant, a mixture of antifreeze and water, dissipates heat from the engine. Check the level in the translucent coolant reservoir (not the radiator itself) when the engine is cold. The fluid level should be between the "min" and "max" lines. If low, top up with the appropriate coolant mixture. Ensure the mixture ratio is suitable for the current climate to prevent freezing in winter.
A hydraulic fluid that transmits pressure from the brake pedal to the brake calipers or pistons, engaging the braking mechanism.
Check the brake fluid level in its reservoir, usually a small transparent plastic tank under the bonnet on the driver's side. The level should be between the "min" and "max" marks. A significant drop in brake fluid level often indicates a leak in the brake system or severely worn brake pads, requiring immediate professional inspection. Brake fluid also darkens over time, indicating contamination, and needs periodic replacement.
This fluid (often water with cleaning agents and antifreeze) is sprayed onto the windshield to clear debris, dirt, and insects. Regularly check the level in the washer fluid reservoir and top it up. In winter, use a winter-grade solution to prevent it from freezing.
Clear visibility through the windshield is non-negotiable for safe driving.
Inspect the wiper blades for signs of wear, such as cracks, tears, stiffness, or missing pieces of rubber. Worn blades leave streaks, skip across the windshield, or fail to clear water effectively, drastically reducing visibility. Replace them if they show any of these signs. Test their operation by spraying washer fluid and observing their sweep.
Ensure the washer fluid nozzles are not clogged and spray adequately across the windshield. A simple test by activating the washer system will confirm this. In winter, make sure the nozzles are not frozen.
While not a daily check, a quick visual inspection of the battery terminals during your säkerhetskontroll is good practice. Look for corrosion (a white or greenish powdery substance) or loose connections. Corroded terminals can impede electrical flow, leading to starting problems, dim lights, or intermittent electronic issues.
Seat belts are your primary safety device. Before driving, particularly if you have passengers, quickly check that all seat belts are in good condition.
Inspect Webbing: Look for any cuts, fraying, or twists in the belt webbing.
Test Retraction: Pull the belt out and then let it go to ensure it retracts smoothly and completely into its housing.
Verify Latch: Insert the metal tongue into the buckle to ensure it clicks securely into place.
Test Pretensioner (if safe): While difficult to fully test during a pre-drive check, a functional seat-belt pretensioner instantly tightens the belt during a collision to improve occupant positioning. Visually, ensure the belt components look intact.
Any defect in a seat belt requires immediate attention and repair.
The thoroughness and focus of your säkerhetskontroll should adapt to various driving conditions and vehicle states.
In urban areas with pedestrians and cyclists, well-maintained and clean headlights, taillights, and functional turn signals are essential to communicate your presence and intentions clearly, preventing misunderstandings and collisions.
Ignoring your säkerhetskontroll and other basic vehicle maintenance can lead to a range of severe consequences:
Ignoring a dashboard warning light for engine oil pressure or brake system failure is extremely dangerous. These indicate critical faults that require immediate attention. Stop the vehicle safely and investigate.
The knowledge gained in this lesson is foundational for many other aspects of safe and responsible driving:
By diligently performing your basic maintenance checks, you actively contribute to making roads safer for everyone, ensure your vehicle operates efficiently, and fulfil your legal obligations as a driver in Sweden.
Lesson content overview
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Find clear answers to common questions learners have about Basic Maintenance Checks. Learn how the lesson is structured, which driving theory objectives it supports, and how it fits into the overall learning path of units and curriculum progression in Sweden. These explanations help you understand key concepts, lesson flow, and exam focused study goals.
A 'säkerhetskontroll' is a mandatory pre-drive safety check that you, as the driver, are responsible for performing. It involves systematically inspecting key components of your vehicle to ensure it's safe to drive. This includes checking tires, lights, fluid levels, and other critical safety elements.
While a quick check of lights and tires before every journey is good practice, a more thorough 'säkerhetskontroll' should ideally be performed regularly, perhaps weekly or before longer trips. The Swedish theory exam expects you to know how and why these checks are done.
The recommended tire pressure is usually found on a sticker inside the driver's side doorjamb, in the glove compartment, or in the vehicle's owner's manual. It's important to check this information for your specific vehicle model.
Yes, you need to ensure all exterior lights are working correctly, including headlights (low and high beam), indicator lights (front, rear, and side), brake lights (front and rear), tail lights, and reverse lights. Having a second person to help check brake lights and reverse lights is often the easiest method.
For the theory test, you primarily need to know how to check the levels of engine oil, coolant, brake fluid, and windshield washer fluid. You should also understand why these fluids are important for vehicle operation and safety.