2009 Proton Savvy 1.1L Petrol · PO58 HNV

Optional automated Savvy models utilize a Magneti Marelli Quickshift automated manual transmission (AMT), which employs an electro-hydraulic robotized actuator to operate a conventional clutch and shift forks. Over time, internal high-pressure hydraulic seals degrade, causing fluid bypass and hydraulic pressure loss within the accumulator sphere. This results in prolonged hesitation, violent jerking when attempting to pull away from standstill, sudden roll-back on UK hills, refusal to select reverse or first gear, and total gearbox limp-mode shutdown. Sourcing replacement AMT solenoids and specialists in the UK is exceptionally difficult, often rendering repairs uneconomical.

The Proton Savvy exhibits a disproportionately high failure rate for front wheel hub bearings on UK roads. The factory-fitted sealed double-row ball bearings suffer from poor water sealing and insufficient high-pressure grease retention. Ingress of salty road spray and repeated pothole impacts pit the internal hardened bearing raceways. This produces a loud, intrusive droning and humming noise that penetrates the lightweight cabin at speeds above 30 mph. Left unresolved, the bearing develops excessive lateral hub play, triggering an MOT failure and risking brake caliper misalignment.

The 1.2-litre 16V D4F engine utilizes an inductive top dead centre (TDC) crankshaft position sensor mounted on the flywheel bellhousing. A well-documented issue on this Renault powerplant, heat cycles from the engine block and oil vapour cause the internal fine copper windings to develop microscopic open circuits when warm. The sensor's electrical resistance climbs out of specification, preventing the Siemens ECU from detecting engine speed and flywheel timing. This causes sudden engine cutting out while driving, extended cranking without firing, and warm starting refusal until the engine bay cools.