Description

1 125 045 045 Scania 2 series truck stator Restore Full Three-Phase Output the Right Way

The alternator is on your bench. Resistance checks on the stator windings show an open circuit, a short to ground, or burnt insulation on one or more phases. So, you already know what failed — now you need the correct replacement to finish the job properly. The 1 125 045 045 Scania 2 series truck stator by Bosch is a brand-new three-phase winding assembly built to the exact specification of the original unit inside Bosch alternator reference 9 120 080 114. Therefore, at just £39.99, you restore your Scania 2 series alternator to full factory output — without the cost of a complete alternator replacement.

Why the Scania 2 Series Alternator Stator Fails — And Why It Matters

The stator generates all the electrical power your Scania 2 series alternator produces. However, it is also the component most vulnerable to heat cycling, vibration, moisture ingress, and insulation breakdown over time.

Scania alternators use three stator windings of three-phase type, with alternating current generated across three phase leads as the rotor turns. Bison Parts So, when even one phase winding fails — through an inter-turn short, open circuit, or earth fault — the alternator loses a significant portion of its rated output. Stator winding faults result in reduced voltage output, overheating, and voltage fluctuations. Truckpages As a result, batteries fail to charge, sensitive cab electronics produce unexplained fault codes, and the remaining two healthy phases carry excess current load — accelerating their own failure.

Furthermore, a stator fault left unrepaired destroys the rectifier diodes faster. Therefore, catching and fixing a winding fault early saves the cost of replacing multiple components at once.

Three Confirmed Signs Your Scania 2 Series Stator Needs Replacing

You do not need specialist equipment to confirm a stator fault on the bench. So, run these three checks before ordering:

Unequal resistance across the three phases — set your multimeter to ohms and measure resistance between each pair of stator leads. All three readings should be identical.

AC voltage imbalance across phases — with the alternator running on a test bench, measure AC voltage between each pair of output leads. Winding to winding shorts or opens will cause low stator voltage. John Whiting Ltd Therefore, unequal readings across the three phases confirm a winding fault rather than a rectifier or rotor problem.

 using a 12-volt test light, connect the ground clip to a known good earth and probe each stator lead individually. If the bulb lights when connected between any of the stator plug pins and ground, the stator is shorted and needs to be replaced. John Whiting Ltd So, run this check before condemning the rectifier — a grounded stator produces identical symptoms to a failed diode pack.

1 125 045 045 Scania 2 series truck stator — Full Part Details

Always cross-reference your existing alternator unit number against Bosch reference 9 120 080 114 before ordering. For full technical winding data and phase configuration, check the Bosch automotive parts database before fitting.

Bosch OEM Stator vs Pattern Rewound Winding — The Difference That Matters

Pattern stator windings and rewound cores exist at lower price points. However, the Scania 2 series alternator runs sustained 24-volt commercial loads — cab electronics, lighting, dual battery systems, and ancillary equipment — for full working shifts without rest.

A rewound stator may use lower-grade copper wire, cheaper slot insulation, and inadequate impregnation varnish. As a result, thermal cycling breaks down the insulation faster than a factory-wound unit — and you end up replacing the stator again within months. So, the £39.99 Bosch OEM price is not a premium over pattern alternatives — it is the cost of a winding that survives the thermal environment your Scania 2 series alternator actually operates in.

Furthermore, this stator ships brand new in original Bosch packaging. Therefore, you know exactly what you are fitting — not a rewound unknown with no verifiable service history.

Complete the Rebuild With 1 125 045 045 Scania 2 series truck stator

The 1 125 045 045 stator sits in Bosch alternator unit 9 120 080 114 alongside rectifier 1 127 320 541 and rotor 9 122 080 731. So, if your rebuild requires more than the stator alone, all three matched components are available together.

Fitting matched Bosch components ensures all parts operate within the same design tolerances. As a result, your rebuilt alternator produces correct output from the first start and avoids the compatibility issues that arise when mixing OEM and pattern components in the same unit.

Get Your

1 125 045 045 Scania 2 series truck stator Rebuilt Today — £39.99, In Stock

The 1 125 045 045 Scania 2 series truck stator is in stock now at just £39.99 — brand new Bosch OEM, three-phase winding, exact fitment for alternator reference 9 120 080 114, and ready to dispatch today. Therefore, your rebuild can start the moment it arrives. And Check out our BOSCH 9 121 080 703 Fan, alternator

Add to cart now and restore your Scania 2 series alternator to full factory output.