Generations
936 — Type 936
1997–2007
1.6 Twin Spark, 1.75 Twin Spark, 1.9 JTD, 2.0 Twin Spark, 2.4 JTD, 2.5 V6
Top issues to watch for
The most serious Alfa Romeo 156 problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.
Dangerous
Structural corrosion reducing rigidity
The 156 suffers from severe structural corrosion that compromises the vehicle's structural integrity. The corrosion typically affects sills, floor pans, and areas around suspension mounting points. This is a progressive failure that worsens significantly with age and mileage, particularly affecting 1.7 petrol and 1.9 diesel variants. The issue is structural, not cosmetic surface rust.
What happens if ignoredStructural corrosion compromises occupant safety in an accident and makes the vehicle unroadworthy. Repair typically requires extensive welding of new metal sections and may cost £2,000-£5,000 depending on extent. Many examples are written off as beyond economical repair when structural corrosion is discovered.
Independent garage
£1,500–£3,000
Specialist
£2,000–£4,000
Main dealer
£3,000–£6,000
Parts only
£200–£800
Dangerous
Flexible brake hose deterioration
The 156 has a documented problem with premature flexible brake hose failure, with MOT data showing failure rates of 15.4x the fleet average. The rubber brake hoses connecting the rigid brake lines to the brake calipers deteriorate, becoming cracked, twisted, or internally collapsed. This affects braking performance and can lead to complete brake failure. The problem is most severe on 2.0 petrol variants and worsens with age, affecting all mileage bands from 60,000 miles upward.
What happens if ignoredFailed brake hoses can cause complete loss of braking on the affected circuit or wheel. Internal collapse restricts brake fluid flow, reducing braking effectiveness. External failure causes brake fluid loss and brake system failure. The car should not be driven with suspected brake hose problems.
Independent garage
£200–£400
Specialist
£250–£450
Main dealer
£350–£600
Parts only
£80–£150
Dangerous
Suspension mounting point corrosion
The 156 suffers from corrosion in the prescribed areas within 30cm of suspension mounting points, with MOT data showing 5.9x higher failure rates than average. This affects the structural integrity of areas where suspension components attach to the body shell. The corrosion weakens load-bearing structures critical for suspension geometry and vehicle safety. This is distinct from general body corrosion and specifically affects the mechanical mounting points that carry suspension loads.
What happens if ignoredCorroded suspension mounting points can fail completely, causing loss of vehicle control and potential wheel detachment. The structural damage compromises occupant safety and typically requires extensive welding repairs. Many vehicles are written off when significant mounting point corrosion is discovered.
Independent garage
£1,000–£2,500
Specialist
£1,500–£3,500
Main dealer
£2,500–£5,000
Parts only
£200–£600
Major
Coil spring fracture
The 156 suffers from premature coil spring failure with MOT data showing 7.7x higher failure rates than the fleet average. Springs can fracture or seriously weaken, typically at the bottom coils where corrosion is worst. The problem affects all engine variants and begins as early as 40,000 miles. Failed springs cause the car to sit lower on the affected corner, alter handling characteristics, and can damage tyres through uneven contact with the road surface.
What happens if ignoredA fractured spring reduces vehicle stability, causes uneven tyre wear, and can fail completely without warning. Complete failure results in loss of vehicle control and potential damage to brake lines, CV joints, and wheel arch liners. Typical repair involves replacing springs in pairs per axle.
Independent garage
£300–£500
Specialist
£350–£600
Main dealer
£500–£800
Parts only
£150–£300
1 more known issues tracked
Including wear items, electrical niggles, and generation-specific problems. Check a specific car to see which issues apply to its age and mileage.
Check a specific car →MOT failure hotspots
Based on DVSA MOT test data. These are the items where the Alfa Romeo 156 fails at a significantly higher rate than the average car.
Subframe bushes or mounts worn
Suspension · 100-120k miles
MOT failure rate: 23x the fleet average
Sample: 135 tests
Emissions failure
Exhaust & Emissions · 120-150k miles
MOT failure rate: 20x the fleet average
Sample: 311 tests
Light unit fault
Lights & Electrics · 150k+ miles
MOT failure rate: 18x the fleet average
Sample: 349 tests
Structural corrosion
Bodywork · 60-80k miles
MOT failure rate: 18x the fleet average
Sample: 211 tests
Brake hoses perished or damaged
Brakes · 40-60k miles
MOT failure rate: 18x the fleet average
Sample: 236 tests
Anti-roll bar links worn
Suspension · 60-80k miles
MOT failure rate: 14x the fleet average
Sample: 171 tests
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Related
Alfa Romeo 156 reliability FAQs
What are the most common problems with the Alfa Romeo 156?
The Alfa Romeo 156 has 5 known issues across 3 severity levels. The most serious are: Structural corrosion reducing rigidity, Flexible brake hose deterioration, Suspension mounting point corrosion.
Is the Alfa Romeo 156 reliable?
The Alfa Romeo 156 has 3 dangerous and 1 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 156 problems?
Repair costs range widely. The most significant issue (Structural corrosion reducing rigidity) costs £1,500–£3,000 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.