The SEAT Leon 3 (5F1) 1.0 TSI 86 hp (63 kW petrol) is covered by 1 exchange-standard reference(s). Check output before displacement: it determines the part.
Engine specification: 999 cm³, petrol, built from 09/2018 to 08/2020. Matching part number: 1633 988 0027 (BorgWarner - KKK). Compare with the code stamped on your part.
A remanufactured turbocharger for the SEAT Leon 1.0 TSI 86 CV starts at €416.67. This engine takes a single reference, 1633 988 0027: the price shown is the one part that fits your vehicle, with no variant to compare.
The reference is 1633 988 0027. It is what settles the match on a SEAT 3 (5F1) with the 1.0 TSI 86 CV engine — not the vehicle's trade name, nor its year.
Because this engine was built with a single turbocharger. Other Leon engines carry several references depending on the production period; here the choice is unique, which rules out any risk of error.
It is on the riveted plate of the centre housing, on the compressor side. The plate holds the marking even on a part coated with oil and soot. It is the only reading that confirms the match with 1633 988 0027.
Part 1633 988 0027 is sold as an exchange unit: it has already been remanufactured and balanced, and the turbocharger you remove goes back into the reconditioning circuit. Return terms are stated at checkout.
An exchange turbocharger is an original part restored to working order: wear parts are replaced and the rotating assembly is rebalanced. It carries the same reference, 1633 988 0027, and fits in place of the part removed.
No: it matches 3 (5F1) models fitted with the 1.0 TSI 86 CV engine. A 3 (5F1) running on diesel, or at a different petrol power output, takes another reference.
No. Two Leon of the same year can take different turbochargers depending on their engine. It is the engine-and-power pairing — here 1.0 TSI 86 CV — that determines the reference, and the code on the removed part that confirms it.
On this petrol engine, a turbocharger nearing the end of its life shows up as a loss of power under acceleration, smoke at the exhaust, a whistle rising with engine speed and a drop into limp mode. These signs overlap with other intake faults: diagnosis is a job for a qualified technician.
On this 1.0 TSI 86 CV, the ECU limits the engine when it no longer finds the boost pressure expected for the 86 CV rated output. A turbocharger that no longer regulates pressure correctly is one possible cause, alongside an air leak or a faulty pressure sensor.
On this 1.0 TSI 86 CV petrol engine, blue smoke means oil is passing, as on a diesel — turbocharger sealing is one candidate among other parts; white smoke points instead to an ignition fault, specific to petrol engines. Colour guides the diagnosis, it does not replace it.
No. The whistle can come from the turbocharger itself, but equally from a leak on an intake hose, the intercooler or the wastegate. Noise alone is not enough to condemn the part.
That depends on the reference fitted from the factory: a twin-scroll turbocharger separates the exhaust flows to limit interference between cylinders, an architecture more common on sporting petrol engines. The listing for reference 1633 988 0027 states the architecture used on this 1.0 TSI 86 CV.
By a fault code read and a boost pressure check, carried out by a qualified technician, before any order of reference 1633 988 0027. That check separates a failed turbocharger from an air leak or a faulty sensor — three faults with similar symptoms but different remedies.
Yes: reference 1633 988 0027 is the original fitment for a SEAT 3 (5F1) with the 1.0 TSI 86 CV engine. It keeps the dimensions, the mounting and the connections of the part removed. Fitting is a job for a qualified automotive technician.
