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Alfa Romeo 159 Problems & Known Issues

The most common Alfa Romeo 159 problems ranked by severity — what to watch for, what it costs to fix, and what happens if you ignore it.

Generations

159 — Alfa Romeo 159
2005–2011
1.75 TBi, 1.9 JTDm, 2.2 JTS, 2.4 JTDm, 1.8 MPI

Top issues to watch for

The most serious Alfa Romeo 159 problems ranked by severity. We track 15 known issues — here are the ones you need to know about first.

Dangerous
Swirl flap failure (JTDm diesel)
1592005–201180k–180k miles
The intake manifold swirl flaps on JTDm diesel engines can fracture and be ingested into the engine, causing catastrophic damage. The plastic flap arms become brittle with heat cycling and can break away from the manifold.
What happens if ignoredIf a swirl flap fragment enters a cylinder, it can cause catastrophic piston, valve, and bore damage requiring engine replacement. Preventive removal or blanking is the recommended approach.
Independent garage
£200–£400
Specialist
£250–£450
Main dealer
£350–£600
Parts only
£50–£150
Dangerous
Timing belt service (1.9 and 2.4 JTDm diesel)
1592005–20110k–60k miles
The 1.9 and 2.4 JTDm diesel engines require a timing belt change every 60,000 miles or 4 years, whichever comes first. The water pump and tensioners should be replaced at the same time. This is an interference engine; belt failure causes catastrophic valve and piston damage.
What happens if ignoredBelt failure destroys the engine. Replacement belt, tensioner, and water pump is the standard service.
Independent garage
£350–£500
Specialist
£450–£650
Main dealer
£550–£800
Parts only
£120–£250
Major
Steering rack failure
1592005–201160k–150k miles
The 159 is prone to steering rack failure. This is a common and expensive issue, often requiring a complete rack replacement rather than a repair.
What happens if ignoredA failing rack worsens progressively. Complete failure results in very heavy steering. Rack replacement is labour-intensive due to the 159's engine bay layout.
Independent garage
£600–£1,000
Specialist
£800–£1,300
Main dealer
£1,000–£1,800
Parts only
£300–£700
Major
Coil spring fracture
1592005–201150k–150k miles
The 159 is a heavy car, which places high stress on the front coil springs. Springs are known to fracture, particularly at the lower coil. Upgraded aftermarket springs are available and recommended when replacing.
What happens if ignoredA fractured spring is an MOT failure and affects handling and braking stability. A separated spring section can damage the tyre or brake lines.
Independent garage
£150–£300
Specialist
£200–£400
Main dealer
£300–£500
Parts only
£60–£140

11 more known issues tracked

Including wear items, electrical niggles, and generation-specific problems.

MOT failure hotspots

Based on DVSA MOT test data. These are the items where the Alfa Romeo 159 fails at a significantly higher rate than the average car.

Structural corrosion
Bodywork · 60-80k miles
MOT failure rate: 27x the fleet average
Sample: 306 tests
Stop lamps remain on when the brakes are released
Lights & Electrics · 120-150k miles
MOT failure rate: 21x the fleet average
Sample: 1,910 tests
Emissions failure
Exhaust & Emissions · 80-100k miles
MOT failure rate: 18x the fleet average
Sample: 568 tests
Suspension component damaged or corroded
Suspension · 120-150k miles
MOT failure rate: 16x the fleet average
Sample: 1,910 tests
Light unit fault
Lights & Electrics · 60-80k miles
MOT failure rate: 14x the fleet average
Sample: 1,421 tests
Subframe bushes or mounts worn
Suspension · 40-60k miles
MOT failure rate: 13x the fleet average
Sample: 385 tests

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Related

Alfa Romeo 159 reliability FAQs

What are the most common problems with the Alfa Romeo 159?

The Alfa Romeo 159 has 15 known issues across 3 severity levels. The most serious are: Swirl flap failure (JTDm diesel), Timing belt service (1.9 and 2.4 JTDm diesel).

Is the Alfa Romeo 159 reliable?

The Alfa Romeo 159 has 2 dangerous and 7 major known issues. Most can be avoided with a thorough pre-purchase check and full service history.

How much does it cost to fix Alfa Romeo 159 problems?

Repair costs range widely. The most significant issue (Swirl flap failure (JTDm diesel)) costs £200–£400 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.