✓ The faults of this engine were checked against sources (10/2026). Each item has at least two independent sources or an official recall or parts-maker technical note.
Big-end (con-rod) bearing failure (105 PS BXE / BLS / BKC)
usually 100,000–250,000 km · High risk
engine codes: BXE, BLS, BKC
Signs: Quiet knocking from the bottom end that gets louder, oil pressure warning; can end in a seized engine or broken con-rod
Fix: At the first knocking stop driving and have the bearings checked; replace bearing shells (and crankshaft if damaged) or the engine; change oil to VW 505.01 / 507.00 about every 10,000-15,000 km
€800–3,500
Camshaft, injector rockers and lifters wear (PD engines)
usually 150,000–280,000 km · Medium risk
engine codes: AJM, ATD, ASZ, ARL, AXR, AUY
Signs: Ticking from the cylinder head, rough running, loss of power and more smoke
Fix: Inspect the cam lobes under the valve cover; replace camshaft, lifters and worn rockers as a set; always use oil to VW 505.01 (507.00 with DPF)
€400–1,000
Unit injector wear or leak (PD engines)
usually 150,000–280,000 km · Medium risk
engine codes: AJM, ATD, ASZ, ARL, AXR, AUY
Signs: Black smoke, hard starting, rough idle, higher fuel use, misfire on one cylinder
Fix: Check injector deviations in live data and coil resistance; recondition or replace the faulty injector with new seals and a new retaining bolt
€250–1,500
Unit injector wiring loom / connectors in the head (PD engines)
usually 150,000–300,000 km · Wear part
engine codes: AJM, ATD, ASZ, ARL, AXR, AUY
Signs: Random, intermittent misfire codes on one or more cylinders, rough running that comes and goes
Fix: Wiggle-test the main and injector connectors with a continuity check before condemning injectors; replace the injector loom
€150–400
Turbo vanes (VNT) sticking from soot
usually 150,000–250,000 km · Medium risk
Signs: Limp mode under load, uneven power, overboost / underboost codes
Fix: Check the actuator, vacuum lines and boost in live data; clean the vanes or recondition the turbo
€250–900
EGR valve and intake manifold soot build-up
usually 120,000–250,000 km · Wear part
Signs: Loss of power, poor throttle response, black smoke, EGR or air-mass fault codes
Fix: Check the EGR valve and the MAF sensor in live data; clean or replace the EGR valve, and clean the intake manifold if deposits are heavy
€100–500
Tandem (fuel / vacuum) pump leak (PD engines)
usually 150,000–300,000 km · Wear part
engine codes: AJM, ATD, ASZ, ARL, AXR, AUY
Signs: Diesel smell or wet spot at the back of the cylinder head, hard starting, weak brake servo
Fix: Reseal or replace the tandem pump; check the camshaft drive slot if the pump has failed
€150–450
Injection pump seal leaks (older VE-pump engines)
usually 150,000–350,000 km · Wear part
engine codes: 1Z, AHU, AFN, AVG, AHH, ALH
Signs: Diesel weeping from the top of the injection pump, diesel smell, sometimes hard starting
Fix: Replace the quantity adjuster and pump top seals; have the pump overhauled by a diesel shop if it also runs badly
€100–700