SEAT Leon 1.9 TDI Turbo

1.9 TDI 90 hp or 150 hp: every turbo available here is new — none are reconditioned

Every turbo in this collection is sold new, regardless of the power output — 90, 105, 110, 115, 130 or 150 hp. There is no reconditioned option here. A new turbo is supplied directly, with no old unit to return.

Six power outputs, distinct engine codes

The 1.9 TDI in the Leon covers a wide range, and the stated power output alone is not enough to identify the correct turbo: it is the engine code stamped on the block that matters. The codes AGR and ALH correspond to the 90 hp in its original version. The 90–105 hp group covers a much broader set of codes: AGR, AHF, AJM, ALH, ASV, ATD, AVQ, BEW, BJB, BKC, BLS, BRU, BXE, BXF, BXJ — each may point to a different reference. The 110–115 hp is covered by AJM, AUY, BVK; the 130 hp by ASZ; the 150 hp by ARL. A 90 hp version carrying the code BXE does not use the same turbo as a 90 hp version carrying AGR: cross-referencing the power output with the engine code is essential before placing any order.

Failure causes to address before replacement

On this diesel engine, turbo failure most commonly follows identifiable patterns: degraded oil or a blocked lubrication circuit, EGR fouling carrying soot into the intake, or a foreign body ingested on the compressor side. The usual symptoms are persistent blue or black smoke, a characteristic whistling noise under acceleration, a noticeable loss of power, or the engine entering limp mode. Fitting a new turbo without having diagnosed and resolved the root cause will invariably lead to another premature failure.