Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions
Where is the ABS control unit located in the Smart 451?
Answer: The Smart 451 has its ABS control unit installed in the engine compartment. It is quite easy to locate, as it is located immediately behind the power ... Read all

Posted on 20-06-2023
How do you unlock the radio on the Smart Fortwo?
Answer: This anomaly usually occurs when the battery is discharged and the vehicle is stationary for a couple of days. In this case, when starting the engine,... Read all

Posted on 18-03-2023
What does it mean when the three lines on the Smart dashboard light up?
Answer: This is a problem that Smart has been dealing with for some years. When the three lines appear on the instrument panel, the gearbox locks up and when ... Read all

Posted on 12-03-2023
What does the Smart Service light indicate?
Answer: When the Service warning light appears on the Smart instrument panel, it means that the period in which to carry out the programmed coupon has been re... Read all

Posted on 2-03-2023
How to reset the service warning light on the Smart 453?
Answer: To reset this light we have to turn on the panel and navigate between the various items using the arrow buttons until you reach the one that mentions ... Read all

Posted on 15-10-2022
How to unlock the automatic transmission of the Smart?
Answer: The unlocking operation of the Smart automatic gearbox is carried out by lifting the cover that surrounds the lever and pressing the button below. In ... Read all

Posted on 26-09-2022
How do you unlock the Smart Fortwo immobilizer?
Answer: In order to unlock the Smart Fortwo immobilizer, you must enter the passenger compartment and close the doors using the remote control. Then you will ... Read all

Posted on 22-09-2022
What to do if you have problems with the throttle body of the Smart 451?
Answer: When the throttle body of your Smart 451 does not work correctly, there can be various anomalous behaviors of the car especially during the accelerati... Read all

Posted on 21-09-2022
How to replace the fuel pump in the Smart?
Answer: We first disassemble the fuel tank, locate the fuel pump and remove the lid. Then we disconnect both the supply hose and the electrical connector, tak... Read all

Posted on 19-08-2022
How much does it cost to replace the starter motor on the Smart ForTwo?
Answer: The replacement of the starter motor of the Smart ForTwo 453 is an operation that must be entrusted to your trusted workshop. Generally, the cost incl... Read all

Posted on 26-06-2022
What to do if the key gets stuck in the Smart?
Answer: When this problem occurs it is advisable not to force the key otherwise it could get stuck; it is advisable to remove the ignition lock and clean it w... Read all

Posted on 13-06-2022
Why did all the lights in the Smart ForTwo come on?
Answer: If all the warning lights remain on in the Smart ForTwo after starting the engine, there is most likely a fault in the control unit located together w... Read all

Posted on 29-05-2022
Where is the control unit located in the Smart 450?
Answer: The engine control unit of your Smart (or SAM control unit) is located inside the passenger compartment of your car. You can find it precisely on the ... Read all

Posted on 27-05-2022
How to remove the door panel in the Smart Fortwo?
Answer: Removing the door panel of the Smart Fortwo 453 is very simple, we need a Torx T20 wrench, a T13 and a plastic removal tool. First we unscrew the scre... Read all

Posted on 17-05-2022
What does the warning light with an exclamation point and a triangle on the Smart 453 mean?
Answer: The warning light with an exclamation point and a yellow triangle, which may appear on the instrument panel of the Smart 453, identifies a fault in th... Read all

Posted on 28-04-2022
Where is the horn of the Smart 450 located?
Answer: The horn of the Smart 450 is located inside the engine compartment, under the steering wheel and near the radiator. To access it, it will therefore be... Read all

Posted on 31-03-2022
What are the problems with the automatic transmission of the Smart 453?
Answer: The problems of the automatic gearbox of the Smart 453 could be due to a malfunction of the actuator, that is the electronic mechanism that allows the... Read all

Posted on 17-03-2022
Where is the gearbox control unit of the Smart 451?
Answer: The Smart 451 gearbox management unit is located inside the passenger compartment, immediately under the driver's seat. In order to access it, it will... Read all

Posted on 1-03-2022
Where is the battery on the Smart 453?
Answer: On the Smart 453 the battery is located under the hood, which you will need to remove, and near the windshield. When extracting it, remember to always... Read all

Posted on 25-12-2021
Where is the spare wheel of a Smart ForFour located?
Answer: The spare wheel of our Smart ForFour is located inside the luggage compartment, under the bottom cover. To reach it, we will only have to open the tai... Read all

Posted on 17-12-2021
Where is the starter motor located on my Smart 453?
Answer: The starter motor on your Smart 453 is positioned exactly under the intake manifold. To reach it you have to remove the muffler and water pipes from t... Read all

Posted on 4-10-2021
Where is the starter motor of a Smart ForTwo located?
Answer: The starter motor of a Smart ForTwo is located inside the engine compartment, near the rear of the engine block. To reach it we will simply have to li... Read all

Posted on 8-09-2021
What does the yellow triangle light with exclamation mark on a Smart ForTwo mean?
Answer: When the yellow triangle-shaped warning light with exclamation mark appears in the instrument panel of our Smart ForTwo, the car wants to inform us th... Read all

Posted on 6-09-2021
Why is the Smart's cooling fan not working?
Answer: If the Smart cooling fan does not work, there could be various causes: the most probable are the relative blown fuse, problems with a relay, the water... Read all

Posted on 21-08-2021
Where is the fuel pump relay on a Smart ForTwo located?
Answer: Our Smart ForTwo's fuel pump relay is located inside the fuse box. In turn, the fuse box is located below the dashboard, near the steering column.... Read all

Posted on 7-08-2021
How much engine oil does a Smart 450 700 need?
Answer: The amount of engine oil required for a Smart 450 is 3 liters. It is also advisable to replace the oil filter so as not to mix the old oil with the ne... Read all

Posted on 24-07-2021
Where is the Smart spare wheel located?
Answer: The spare wheel of the Smart (when present) is normally located in the special compartment inside the rear boot, covered by a removable rigid floor. A... Read all

Posted on 18-07-2021
Where is the wiper water tank located on the Smart?
Answer: To fill your Smart's wiper water tank, simply remove the front air intake grille. In fact, under it you will find the cap of the tank to be filled wit... Read all

Posted on 10-07-2021
Where is the jack on a Smart ForTwo?
Answer: The jack of a Smart ForTwo is positioned inside the luggage compartment, near the spare wheel. To reach it, we will only have to open the tailgate, an... Read all

Posted on 30-03-2021
Where does the Aux cable connect to the Smart 451?
Answer: If you want to install an AUX input on the original car radio, you just need to buy the appropriate cable which has a jack at one end and the socket t... Read all

Posted on 6-12-2018

See also

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Why do the parking sensors of the Volkswagen Golf 8 not work? Answer: 23-06-2023
How to open the trunk of the Opel Astra that remained closed? Answer: 22-06-2023