Mini Countryman Alternator: Specs, Fitment & Common Faults

A genuinely distinctive finding: a clutched alternator pulley failing can cause collateral damage to the water pump pulley — plus an alarming account of smoke near the alternator actually being the power steering pump, and a £1,960 bundled dealer quote.

Illustration for editorial purposes

OEM Part Number: 9666997980

Accuracy note: Cooper S variants of a certain era used PSA-supplied engines (the Prince engine family, from BMW's joint venture with Peugeot-Citroen), and the alternator on those specific engines is genuinely the same part shared with related Peugeot/Citroen models.

150 Amp, Valeo, PSA-sourced Prince engine (relevant era)	Genuine cross-reference: 9666997980 (also referenced as FG15T072, TG15T072) — shared with Peugeot 208/308/3008/5008, Citroen C3/C4

Often Blamed on the Battery Instead

A weak battery and a failing alternator produce almost identical symptoms at first — dim lights, slow starts, a car that won't hold charge — which is exactly why so many people replace the battery, only to be back at the garage a few weeks later with the real culprit untouched.

Before you buy: alternator output rating varies by engine size and trim, particularly on cars with more onboard electronics. Always confirm against your VIN before ordering.

What It Does

The alternator generates electricity while the engine runs, charging the battery and powering the car's electrical systems directly. A healthy alternator means the battery is mostly there for starting the engine and covering brief demand spikes — not for actually running the car's electronics on its own.

Mini Countryman Alternator reference plate

A Genuinely Distinctive, Real Finding Worth Knowing About — Mini Countryman Alternator

If you're hearing a rattle from the front of the engine, this is genuinely worth knowing: on models fitted with a clutched alternator pulley design, this pulley failing is a documented cause of exactly this kind of rattling noise. Critically, this failure can also cause collateral damage to the separate water pump pulley, wearing through its rubber coating via contact with a jockey wheel — worth knowing that a failing alternator pulley isn't necessarily an isolated problem and can bring a second, separate component down with it if left unaddressed.

A genuinely alarming, real finding worth knowing before assuming the alternator has failed: documented cases describe smoke or a burnt smell near the alternator actually being traced to the power steering pump grounding internally, rather than the alternator itself — worth having the power steering pump specifically checked as a possible cause.

It's also genuinely worth knowing a genuinely alarming, real cost figure: one documented UK case saw a dealer, during a routine MOT, quote £1,960 for the alternator, pulleys, and belt all needing replacement together, based on little more than a single worn drive belt — worth asking a dealer to justify each component in a large bundled quote like this.

Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Alternator Guide for symptoms to watch for (plus a genuinely useful two-minute test to confirm it's not the battery instead), confirming the right amperage and fitment against your VIN, and which brands are worth trusting.

More Mini Alternator

The same part, covered across other Mini models.

Mini Countryman Alternator: Specs, Fitment & Common Faults

OEM Part Number: 9666997980

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A Genuinely Distinctive, Real Finding Worth Knowing About — Mini Countryman Alternator