Generations
S4 — Series IV
1956–1993
1.6L Ford CVH, 1.8L Ford Zetec, 2.0L Ford
S5 — Series V
1993–2018
1.6L Ford Sigma, 1.8L Ford Zetec
Top issues to watch for
The most serious Morgan 4/4 problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.
Dangerous
Front wheel bearing failure
Morgan 4/4 models suffer from premature front wheel bearing wear at extraordinarily high rates compared to conventional cars. MOT data shows failure rates 55.6 times higher than the national fleet average on 1.6L models, with failures occurring from very low mileages. The traditional front suspension design with sliding stub axles places unusual stresses on the wheel bearings, and the exposed nature of the running gear allows contamination from road debris and moisture. This is a safety-critical failure that can cause wheel detachment.
What happens if ignoredA collapsed wheel bearing can cause the wheel to detach from the vehicle while driving, resulting in total loss of control and potentially fatal accident. Early intervention allows bearing replacement for £200-400 per side. Complete bearing collapse may damage the hub, stub axle, or suspension components, increasing repair costs to £600-1,000 per corner.
Independent garage
£180–£350
Specialist
£250–£450
Main dealer
£400–£650
Parts only
£80–£150
Major
Brake binding and caliper seizure
Morgan 4/4 models show brake caliper binding at 14.8 times the national fleet average, with failures recorded across all mileage bands from new. The exposed brake components are subject to corrosion from road spray and seasonal storage conditions typical of these cars. Brake calipers seize due to corrosion of the piston and caliper bore, or failure of the sliding mechanism on floating calipers. This creates uneven braking, brake drag, and potential brake fade under heavy use.
What happens if ignoredBinding brakes cause rapid pad and disc wear, brake fade under heavy use, and potential loss of braking effectiveness. Seized calipers require replacement or refurbishment. Complete caliper failure can result in brake fluid loss and partial brake system failure. Repair costs range from £150-300 per caliper for refurbishment to £300-500 for replacement.
Independent garage
£200–£400
Specialist
£300–£500
Main dealer
£450–£700
Parts only
£120–£250
Major
Stub axle wear
The Morgan 4/4 uses a traditional sliding pillar front suspension with stub axles that pivot on bronze bushes. MOT data shows stub axle and bush wear at 9.5 times the fleet average on 1.8L models. The bronze bushes wear due to road contamination and insufficient lubrication, allowing excessive play in the stub axle assembly. This affects steering precision, wheel alignment, and tyre wear patterns. The design is fundamentally different from conventional ball joint systems and requires specialist knowledge for proper adjustment.
What happens if ignoredWorn stub axle bushes cause vague steering, rapid tyre wear, and compromised handling. Left uncorrected, severe wear can affect braking stability and steering control under emergency conditions. Bush replacement requires specialist knowledge of Morgan suspension geometry. Costs range from £300-600 per side including geometry setup.
Independent garage
£400–£700
Specialist
£500–£800
Main dealer
£700–£1,200
Parts only
£150–£300
Minor
Steering rack gaiter damage
Morgan 4/4 models show steering rack gaiter and ball joint dust cover failures at up to 34.7 times the fleet average, particularly on 1.6L models from low mileages. The exposed nature of the steering components and traditional construction methods make the rubber gaiters vulnerable to damage from road debris, UV degradation, and physical contact during maintenance. Failed gaiters allow dirt and moisture into the steering rack, accelerating wear of internal components.
What happens if ignoredDamaged gaiters allow water and dirt into the steering rack, causing premature wear of internal seals and rack mechanism. Early replacement of gaiters costs £50-150. If left until internal damage occurs, steering rack replacement or refurbishment costs £400-800. The steering remains safe in the short term but will deteriorate rapidly once contaminated.
Independent garage
£80–£150
Specialist
£120–£200
Main dealer
£180–£280
Parts only
£25–£60
1 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 Morgan 4/4 fails at a significantly higher rate than the average car.
Emissions failure
Exhaust & Emissions · 20-40k miles
MOT failure rate: 469x the fleet average
Sample: 380 tests
Free play in the steering, measured at the rim ...
Steering · 60-80k miles
MOT failure rate: 411x the fleet average
Sample: 130 tests
Steering rack wear
Steering · 20-40k miles
MOT failure rate: 80x the fleet average
Sample: 1,204 tests
Brake pedal anti-slip provision missing, loose ...
Brakes · 0-20k miles
MOT failure rate: 73x the fleet average
Sample: 711 tests
Brakes imbalance across an axle
Brakes · 40-60k miles
MOT failure rate: 46x the fleet average
Sample: 157 tests
Stop lamps all missing or inoperative
Lights & Electrics · 0-20k miles
MOT failure rate: 43x the fleet average
Sample: 1,074 tests
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Related
Morgan 4/4 reliability FAQs
What are the most common problems with the Morgan 4/4?
The Morgan 4/4 has 5 known issues across 3 severity levels. The most serious are: Front wheel bearing failure.
Is the Morgan 4/4 reliable?
The Morgan 4/4 has 1 dangerous and 2 major known issues. Most can be avoided with a thorough pre-purchase check and full service history.
How much does it cost to fix Morgan 4/4 problems?
Repair costs range widely. The most significant issue (Front wheel bearing failure) costs £180–£350 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.
Which Morgan 4/4 generation is most reliable?
The S4 (1956–1993) has the fewest dangerous issues (1). However, condition and service history matter more than generation — a well-maintained earlier car can be more reliable than a neglected newer one.