1998 Daewoo Lanos 1.6L Petrol · R321 MDM

Exposed underside sheet metal around the front subframe anchor bolts, rear trailing arm attachment brackets, and floorpan seams suffers from advanced rust perforation under UK winter road salt exposure. The thin factory primer and sealant crack over time, allowing moisture to wick between welded body seams. Corrosion progresses unseen until structural rigidity is severely compromised, resulting in immediate MOT test failure and requiring substantial fabricated steel repair plates.

The hydraulic wheel cylinders inside the rear drum brake assemblies are prone to internal corrosion and fluid weeping past rubber piston seals. Over time, road salt and brake dust cause the internal pistons to seize inside their cast iron bores. This causes the rear brake shoes to drag continuously against the drums, overheating the rear hubs, accelerating shoe friction lining wear, creating uneven handbrake holding, and failing MOT brake roller tests.

The magnetic crankshaft position sensor mounted low on the engine block adjacent to the front crankshaft pulley is exposed to extreme thermal cycling from the exhaust system. As the internal fine copper windings degrade, thermal expansion breaks electrical continuity when the engine bay reaches full operating temperature. This causes sudden engine cutting out while driving, extended starter motor cranking on warm restart, and check engine lamp illumination.