2001 Alfa Romeo 166
Browse our directory of 2001 Alfa Romeo 166 vehicles. Access instant MOT history reports, tax status, and reliability insights for any registration listed below.
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Showing registrations 1–40 of 55 for the 2001 Alfa Romeo 166. Select any plate for an instant vehicle history check.
Common Problems & Reliability
The 2001 Alfa Romeo 166 has 3 known issues. 1 of these are classified as serious faults that could be expensive to repair. 2 are moderate concerns worth inspecting before purchase.
V6 Water Pump Plastic Impeller Failure and Overheating
SeriousThe factory water pump on the 24V Busso V6 engines (2.5, 3.0, and 3.2) features a composite plastic impeller. Over time and thermal cycles, the plastic becomes brittle, developing hairline cracks until it spins loosely on the metal drive shaft. Coolant circulation ceases, causing rapid engine overheating, blown head gaskets, or warped aluminium heads. Specialists fit metal-impeller pumps with cambelt services.
Symptoms: Engine coolant temperature gauge rises past 90°C during low-speed driving or idle, Cabin heater blows lukewarm or cold air despite engine indicating hot temperatures...
Est. repair cost: £450–£850 (water pump and timing belt kit replacement)
Integrated Control System (ICS) and Heater Matrix Leaks
ModerateThe dashboard centre console contains the Integrated Control System (ICS) screen governing climate, audio, and trip functions. Directly above the main electrical modules sits the cabin heater matrix. Ageing plastic matrix end tanks crack, leaking hot ethylene glycol coolant directly into the wiring looms and ECUs. This leads to flickering ICS displays, battery drain, and screen locking if code cards are missing.
Symptoms: Sweet coolant smell in the cabin and greasy fogging on the windscreen interior, Damp, sticky carpet in driver or passenger footwells near the centre console tunnel...
Est. repair cost: £300–£750 (heater matrix replacement, loom cleaning, and code reset)
Front Upper and Lower Suspension Wishbone Bush Wear
ModerateThe heavy executive saloon chassis and front-wheel drive place high loads on the double-wishbone front suspension. In the UK, road salt and potholed tarmac deteriorate the upper wishbone rubber bushes and lower arm rear compliance bushes. This generates loud squeaking over road bumps, steering vagueness, and rapid scrub on the inside shoulders of front tyres.
Symptoms: Loud squeaking noise from front suspension over speed bumps and road humps, Dull metallic clonking when braking or accelerating at low speeds...
Est. repair cost: £250–£550 (front wishbones and alignment)
Buying Tips for the 2001 Alfa Romeo 166
- On Busso V6 engines, verify that the timing belt, idlers, and water pump were changed within 5 years or 60,000 miles, and confirm a metal-impeller pump was fitted.
- Ensure the 4-digit ICS security code card is provided; if battery power is disconnected without this code, the audio, trip, and climate monitor locks permanently.
- Inspect footwell carpets for dampness or sticky coolant residue caused by a leaking heater matrix above the dashboard electronics.
- Listen for front suspension squeaking and clonking over speed humps, and inspect rear multi-link suspension bushes for excessive play.
- On Sportronic automatic models, check for smooth gear shifts across all ratios without harsh engagement or slipping in manual mode.
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