BMW E90 Dashboard Warning Lights Meaning

Rebbeca Jones

Rebbeca Jones

Understanding dashboard warning lights in your BMW E90 is essential for maintaining vehicle safety, as they alert you to potential issues that could lead to breakdowns or accidents if ignored. By recognizing these symbols promptly, you can take appropriate actions to prevent costly repairs and ensure the car operates reliably. This knowledge empowers drivers to address problems early, enhancing overall vehicle longevity and road safety.

BMW E90 Dashboard Warning Lights

Red Warning Lights (Stop Immediately)

These lights indicate serious issues requiring you to stop the vehicle safely and seek immediate assistance to avoid damage or danger.

Engine Oil Pressure

Oil Pressure Warning Light

Low oil pressure can cause engine damage from lack of lubrication. Possible causes include low oil level or pump failure. Stop driving, check oil, and add if needed; consult a mechanic right away.

Brake System Alert

Brake Warning Light

Signals low brake fluid or hydraulic system failure, risking brake loss. Causes may be leaks or worn pads. Pull over safely and call for roadside help without driving further.

Engine Coolant Temperature

Engine Coolant Temperature Warning Light

Engine is overheating, which could lead to severe damage. Causes include low coolant or radiator issues. Stop immediately, let it cool, and check coolant level before proceeding.

Battery Charging System

Battery Warning Light

Battery isn’t charging properly, possibly due to alternator failure. This can cause electrical shutdown. Stop and have the system inspected to prevent stranding.

Airbag Warning

Airbag Deployment Warning Light

Airbag system fault, meaning airbags may not deploy in a crash. Causes include sensor or wiring issues. Stop and get it fixed at a service center for safety.

Transmission Fault

Powertrain Malfunction Light

Transmission overheating or malfunction, risking gear failure. Causes could be low fluid or sensor problems. Stop driving and tow to a repair shop.

Steering System

Power Steering Warning

Power steering failure, making steering difficult and unsafe. Possible causes are fluid leaks or pump issues. Pull over and seek professional help immediately.

Diesel Particulate Filter (DPF)

Diesel Particulate Filter (DPF)

Filter is blocked, potentially causing engine damage in diesel models. Exhaust buildup is the main cause. Stop and visit a service center for cleaning or replacement.

Brake Fluid Low

Brake Fluid

Low brake fluid level, which can lead to brake failure. Leaks or wear are common causes. Stop safely and top up fluid or get it checked.

Seatbelt Reminder

Seatbelt Warning Light And Buzzer

Driver or passenger seatbelt is unbuckled, increasing injury risk in accidents. Simply fasten the belt to resolve; if it persists, check sensors.

Door Ajar

Doors Open Warning Light

A door is not fully closed, posing a safety hazard while driving. Check and secure all doors; if the light stays on, inspect latches.

ABS Failure

ABS

Anti-lock braking system is faulty, reducing braking control. Sensor or module failure is typical. Stop and repair to restore safe braking.

ESP/DSC Failure

ESC Braking Warning Light

Electronic stability program is off or faulty, affecting traction. Wiring or sensor issues cause it. Pull over and diagnose at a shop.

Glow Plug (Diesel Models)

Glow Plug Warning Light

Glow plugs aren’t heating properly for cold starts, risking engine strain. Faulty plugs or wiring. Stop and replace them before further use.

Yellow/Amber Warning Lights (Action Required Soon)

These lights signal issues that need attention soon to prevent escalation, but you can usually continue driving cautiously.

Check Engine

Check Engine Warning Light

Engine or emissions system fault, like sensor issues or misfires. Causes vary from fuel cap to major problems. Schedule a diagnostic check soon.

Tyre Pressure

Tyre Pressure Warning

One or more tires have low pressure, affecting handling and fuel efficiency. Underinflation or punctures cause it. Inflate tires promptly and monitor.

Coolant Level

Coolant Level Warning

Coolant is low, risking overheating if ignored. Leaks or evaporation are causes. Top up coolant and check for leaks soon.

Service Vehicle Soon

Service Due Indicator Light

Vehicle is due or overdue for maintenance. Mileage or time-based reminder. Book a service appointment to address it.

Diesel Exhaust Fluid (DEF)

DEF level is low in diesel models, affecting emissions. Refill the tank soon to avoid reduced engine power.

Bulb Out

Lightbulb Failure

A light bulb, like headlamp or brake light, is faulty. Burnout is the cause. Replace the bulb to ensure visibility and safety.

Fuel Cap

Fuel Cap Warning Light

Gas cap is loose or missing, causing evaporation issues. Tighten or replace it; if light persists, check seals.

Lane Departure

Basic RGB

System detects unintended lane drifting, but may need calibration. Sensor dirt or faults cause it. Clean sensors and recalibrate soon.

Frontal Collision Warning

Collision Prevention Warning Light

Alerts for potential front-end crash risk, but system may be faulty. Clean sensors or have it checked to restore function.

Start/Stop System

Start Stop System Warning

Automatic engine stop/start is malfunctioning. Battery or sensor issues. Service it to regain fuel efficiency benefits.

Air Suspension Fault

Air Suspension Warning

Suspension system has a problem, affecting ride height. Leaks or compressor failure. Get it inspected before long drives.

Water in Fuel Filter (Diesel)

Water In Fuel Warning (Diesel)

Excess water in fuel system, risking engine damage. Contaminated fuel causes it. Drain the filter and refuel from a reliable source.

Engine Air Filter

Cabin Air Filter Warning Light

Air filter is dirty, reducing engine performance. Clogging from dust. Replace the filter during your next service.

Green Warning Lights (Information Only)

These lights provide status updates on active systems or features, requiring no action unless they indicate a problem.

Turn Signal

Turn Signal Active

Indicates turn signals are active for changing direction. Flashes when in use. No action needed unless it fails to turn off.

High Beams

High Beam Indicator

High-beam headlights are engaged for better distance view. Manual or auto activation. Dim them for oncoming traffic.

Daytime Running Lights

Daytime Running Light Failure

Lights are on automatically during daytime for safety. System-controlled. No action; they enhance visibility.

Fog Lamp Indicator

Front Fog Lights

Front or rear fog lamps are active for low visibility. Switch-activated. Turn off in clear conditions.

Automatic Headlamp Dimmer

Automatic Headlights

System is auto-adjusting headlamps for conditions. Sensor-based. No intervention required.

High Beam Assistant

Automatic High Beam Warning Light

Auto high-beam control is on, switching beams as needed. Works with cameras. Override manually if preferred.

Cruise Control

Smart Cruise Control Fault

Cruise control is set and maintaining speed. Driver-activated. Adjust or deactivate as driving changes.

Eco Mode

Eco Mode

Eco driving mode is enabled for better fuel efficiency. Reduces power usage. Switch off for more performance.

Parking Lights

Parking Lights On

Parking lights are on, often with sidelights. Used when parked. Turn off to avoid draining battery.

Indicator Lamp

General system status light, like for accessories. Informs of active features. Monitor for changes.

Short-Beam Headlights

Low Beam Indicator

Low-beam headlights are on for normal driving. Standard operation. No action needed.

When looking at BMW, make sure to check out our guides on models like the BMW X3, BMW X1, BMW 2 Series, and BMW i3. Understanding dashboard warning lights is essential. Our expert reviews break down what each light means, highlighting common alerts for these models and what they could signal about underlying issues, so you’re never left guessing behind the wheel.

Rebbeca Jones
About the author
Rebbeca Jones
Rebbeca Jones leads the detailing department at CarsCounsel, bringing 12 years of experience in automotive aesthetics.

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