Guide complet de l'achat de voiture d'occasion, de l'inspection avant achat, de la detection de fraude et de la protection de l'acheteur. Apprends a eviter les arnaques et a acheter en toute connaissance de cause.
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.
Most used-car checklists cover paint and a test drive but skip the one check sellers fear: a 5-minute OBD2 scan that reads the faults the eye cannot see.
A car can fail its emissions test for incomplete readiness monitors even with nothing wrong. Check them yourself for 15 euros before you book the test.
Clearing a code before inspection resets the readiness monitors, and stations check those. Here are the OBD2 codes that fail, and why a fresh clear fails anyway.
A used car that scans clean can still have its codes wiped minutes before you arrived. Readiness monitors are how you catch it. Here is the check.
A 210,000 km imported diesel that looks too clean hides its faults in the OBD2 data. Here are the red flags a scan catches before you wire the money.
Decode the VIN to confirm the car is the spec the ad claims, then run an OBD2 scan to read its condition. Two steps, fifteen minutes, before you pay.
M57 vs M57N vs M57N2 across E60/E61. Swirl flap delete, twin-turbo wastegate on the 535d, ZF 6HP mechatronic. Five OBD2 checks before 3,000-12,000 EUR.
1.9 PD vs 2.0 TDI CR EA189 vs EA288 across Mk5/6/7/8. Dieselgate fix legacy, DSG mechatronic, DPF on short trips. Five OBD2 checks before 5,000-22,000 EUR.
EA189 B8 dieselgate legacy, EA288 B9, S tronic mechatronic, Quattro Haldex sludge. The 5 OBD2 checks before you pay 9,000 to 35,000 euros for a used A4 TDI.
OM651 balance shaft wear, injector failures, AdBlue countdown, DPF on stop-start duty. The 5 OBD2 checks before you pay 8,000-45,000 EUR for a used Sprinter.
N47 rear timing chain vs B47 front chain. ZF 8HP mechatronic. DPF, EGR, AdBlue. The 5 checks before you pay 8,000 to 28,000 euros for a used BMW 320d.
EA189 vs EA288 vs EA288 evo. The dieselgate fix that still matters. DSG mechatronic, DPF, AdBlue and the five checks before you pay 8,000 to 22,000 euros.
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.
An AdBlue emulator or SCR delete is invisible on the dashboard but leaves stored DEF codes a generic OBD2 scan catches in five minutes. A specialist NOx read confirms the rest.
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.
A removed diesel particulate filter is illegal across the EU and costs EUR 1,500 to 3,500 to refit. Six checks (three visual, three OBD2) catch it before you pay.
A 15-minute pre-purchase OBD2 scan tells you most of what the seller of an imported German used car would rather you didn't ask. Here is the exact checklist.
Your check engine light just came on. Can you keep driving? It depends on whether the light is steady or flashing, and how the car actually feels.
Odometer fraud costs EU buyers billions annually. Learn how to detect mileage rollback using physical evidence, OBD2 scans, and vehicle history checks before you buy.
Complete used car inspection checklist. Readiness monitors, pending codes, live data, physical checks, and how to negotiate with documented findings. EU buyer protection included.