Guida completa alla manutenzione del veicolo, alla cura stagionale, al monitoraggio del punteggio di salute e alla manutenzione preventiva. Mantieni la tua auto efficiente tutto l'anno.
DPF regeneration is your diesel burning soot out of its filter at over 600C. Here are the three types, the signs it is happening, and whether you can keep driving.
A starter motor replacement costs 200 to 500 euros fitted. The symptoms of a bad starter, how to tell it from the battery, and what is fair to pay.
A thermostat replacement costs 120 to 450 euros at a shop. The part is cheap, the labour is the swing, and the symptoms of a stuck thermostat are easy to read.
A grinding noise when driving usually means brakes, a wheel bearing, a CV joint or a belt pulley. Match when it grinds to the part, and to the repair cost.
A car battery replacement costs 60 to 260 euros depending on type. How to tell whether it is the battery or the alternator, and what is fair to pay.
An alternator replacement costs 200 to 450 euros reconditioned, or 350 to 700 new. The warning signs, how to tell it from a flat battery, and what is fair to pay.
A throttle body clean costs 30 to 90 euros and often fixes a rough idle outright. A full replacement runs 150 to 500 euros. Here is how to tell which you need.
Brake pads cost 100 to 250 euros per axle, or 200 to 450 with discs. The signs you are due, why grinding wrecks the discs, and how to avoid paying for parts you do not need.
Shudder at 30-50 mph, RPM flare without acceleration, and harsh Park-to-Drive shifts point to a failing torque converter. Here are the signs, codes and costs.
An ignition coil replacement costs 40 to 180 euros for one fitted, or 150 to 600 for a full set of four. Here is the price by engine and when to do all four.
A timing belt replacement costs 300 to 700 euros, more with the water pump or on premium engines. Here is what is fair, when it is due, and why skipping it risks the engine.
Una valvola EGR guasta dà minimo irregolare, esitazioni e un P0401. Cosa fa la valvola, i sintomi di bloccata aperta o chiusa, e il costo di riparazione.
A water pump replacement costs 150 to 400 euros alone, or 450 to 900 with the timing belt. The signs it is failing, and why ignoring it can warp the engine.
Coolant vanishing with no puddle, white sweet smoke, and overheating point to a failing EGR cooler. Here are the symptoms, the head-gasket overlap, and the cost.
A head gasket replacement costs 500 to 2,500 euros depending on shop and engine. Read the stored code yourself for 15 euros before you authorise the bill.
Worried your mechanic is overcharging or inventing repairs? Read the fault code yourself first, get an itemised quote, and ask for the old parts back.
Two stored fault codes can be worth several hundred euros off the asking price if you present them right. Here is how to turn a pre-purchase OBD2 scan into a documented discount.
A regas runs 60 to 200 euros, a condenser 150 to 500, a compressor 600 to 1,500. Why your car AC is not cold, and what each repair should fairly cost.
A clutch replacement costs 500 to 1,200 euros, or up to 2,000 with a dual-mass flywheel. Read the codes yourself for 15 euros before you authorise the bill.
A spark plug replacement costs 60 to 250 euros on a four-cylinder petrol. What plugs and labour are worth, the VAG TSI catch, and why diesels have none.
An aftermarket catalytic converter runs 350 to 1,200 euros and an OEM one 1,000 to 2,500 and up, but a P0420 code often means a 100 to 300 euro sensor instead.
A timing chain replacement runs 700 to 2,500 euros on VW and Audi TSI engines. What is fair by engine, why it rattles, and the codes to scan first.
Clean a carboned diesel EGR valve yourself for €10-30. Symptoms, step-by-step removal, when to clean vs replace, and how to verify the fix with OBD2.
Long cranking on cold mornings and a flickering coil light point to glow plugs. Test each one with a multimeter, read the circuit codes, and know when to replace.
Test a lambda sensor with OBD2 live voltage or a multimeter, learn why cleaning is a myth, and see what replacement actually costs. Petrol and diesel covered.
Clean a sooty throttle body in under an hour for around 15 euros, handle the idle-relearn question honestly, and verify the fix with OBD2 live data.
Twelve battery health bars, the LeafSpy SOH number, and the four faults that kill resale on a used Leaf. What to check before paying 5,000 to 22,000 euros.
Three battery generations, REX quirks, and four OBD2 checks that separate a healthy used BMW i3 from a tired one. Before you pay 8,000 to 28,000 euros.
BMS_w015, BMS_a067, BMS_u029 and the rest. What each alert means on a used Model 3, S or Y. Range loss patterns and the four codes that mean walk away.
EGR deletion is the hardest of the three diesel emissions cheats to detect with OBD2. Here is what the scan tool reveals, what it cannot, and three physical checks that close the gap.
Rough idle ranges from a 10-euro vacuum hose to a serious engine fault. Here is how to narrow down the cause systematically before you spend on parts.
Your temperature gauge is climbing into the red. Here is exactly what to do in the next 60 seconds, what causes overheating, and how much each repair costs. Acting fast prevents thousands in engine damage.
Your car won't start. Before you call a tow truck, work through this systematic checklist. Most no-start conditions are caused by a handful of common problems you can diagnose in your driveway.
Seasonal car maintenance organized by system - battery, cooling, tires, brakes, fluids. What to check and when, so nothing gets missed.
Your OBD-II scanner works great on petrol cars, then you plug it into an EV and get almost nothing. Here's what actually works.
Learn which car repairs you can safely DIY, which ones will cost you more if you try, and what EU shops actually charge.
Pulisci il sensore MAF in 15 minuti con meno di 10 euro. Guida passo passo con verifica OBD2 per risolvere esitazioni, minimo irregolare e consumi alti.
Scanner diagnostici professionali per le officine 2026: Autel, Launch, Snap-on, Topdon e Foxwell a confronto con prezzi in euro, costi di abbonamento annuale e TCO a 5 anni. Copertura multimarca per tecnici indipendenti e officine specializzate.
Learn how OBD2 works, find the port in your car, understand diagnostic trouble codes, know which problems you can fix yourself, and when to see a mechanic.
P0420 repair cost runs from 150 euros for an oxygen sensor to 2,500 euros or more for a catalytic converter. Here is how to work out which repair you need.
The 15 most common car problems explained: symptoms, diagnostic steps, DIY vs mechanic guidance, and cost estimates in EUR.