Generations
GM1 — First Generation Grand Modus
2005–2012
1.1 16v, 1.5 dCi, 1.6 16v
Top issues to watch for
The most serious Renault Grand Modus problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.
Major
Excessive smoke emissions (1.5 dCi diesel)
This indicates problems with the diesel particulate filter (DPF) system, exhaust gas recirculation (EGR) valve contamination, or injector wear causing incomplete combustion. The issue worsens with age and affects all diesel variants across the production run.
What happens if ignoredMOT failure is certain until resolved. DPF blockage requires professional cleaning or replacement costing £800-£1,500. EGR valve replacement typically costs £300-£600. Injector refurbishment or replacement costs £600-£1,200 for a full set. Continued driving with excessive smoke damages the turbocharger and exhaust system.
Independent garage
£300–£800
Specialist
£400–£1,000
Main dealer
£600–£1,500
Parts only
£150–£600
Major
Premature ball joint wear
Steering ball joints on Grand Modus models fail at rates up to 26.2 times higher than the national fleet average, with failures documented from as low as 20,000 miles. The issue affects all engine variants and appears to be a design weakness rather than wear-related. Ball joint failure creates dangerous steering play and can cause loss of control.
What happens if ignoredComplete ball joint failure causes loss of steering control and presents an immediate safety risk. The vehicle should not be driven if ball joint wear is severe. Replacement of both sides typically costs £200-£400 but failure to address the issue risks a dangerous accident.
Independent garage
£120–£200
Specialist
£150–£250
Main dealer
£200–£350
Parts only
£60–£120
Major
Coil spring failure
Coil springs fail at rates up to 13.3 times higher than the national average, with documented failures from 20,000 miles across all variants. Spring failure typically occurs at the bottom coil where road salt and debris collect, causing corrosion and metal fatigue. This is a common problem on French superminis of this era.
What happens if ignoredBroken springs affect vehicle stability, braking performance, and tyre wear. A completely failed spring can damage the shock absorber, brake lines, or ABS sensors. The car remains drivable with caution but should be repaired promptly. Replacement typically costs £150-£300 per pair.
Independent garage
£80–£150
Specialist
£100–£180
Main dealer
£150–£250
Parts only
£40–£80
Major
Suspension component corrosion
Suspension components show corrosion damage at rates up to 13.5 times higher than the fleet average. This typically affects control arms, subframe mounting points, and suspension links where road salt and moisture collect. The problem is exacerbated by poor corrosion protection on steel suspension components and affects structural safety.
What happens if ignoredSevere corrosion can cause suspension component failure resulting in loss of vehicle control. Components weakened by corrosion may fail suddenly under load. Professional inspection is essential to assess structural integrity. Repair costs vary widely depending on which components are affected but can reach £500-£800 for multiple items.
Independent garage
£150–£400
Specialist
£200–£500
Main dealer
£300–£800
Parts only
£80–£250
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 Renault Grand Modus fails at a significantly higher rate than the average car.
Emissions failure
Exhaust & Emissions · 40-60k miles
MOT failure rate: 95x the fleet average
Sample: 1,114 tests
Light unit fault
Lights & Electrics · 60-80k miles
MOT failure rate: 47x the fleet average
Sample: 1,182 tests
Seat mounting fault
Seatbelts & Airbags · 60-80k miles
MOT failure rate: 32x the fleet average
Sample: 5,584 tests
Stop lamp missing, inoperative or in the case o...
Lights & Electrics · 20-40k miles
MOT failure rate: 30x the fleet average
Sample: 1,388 tests
Track rod ends worn
Steering · 20-40k miles
MOT failure rate: 21x the fleet average
Sample: 2,388 tests
Stop lamp adversely affected by the operation o...
Lights & Electrics · 100-120k miles
MOT failure rate: 21x the fleet average
Sample: 711 tests
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Related
- Renault Grand Modus buyer's guide
- Renault Grand Modus service history check
- Renault Grand Modus service schedule & costs
- Renault Grand Modus MOT failure rates
- How to check Renault service history
- Buying a car without service history
- Renault Grand Modus car check £7.49
- Free car faults check
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Renault Grand Modus reliability FAQs
What are the most common problems with the Renault Grand Modus?
The Renault Grand Modus has 5 known issues across 1 severity levels. The most common problems relate to Excessive smoke emissions (1.5 dCi diesel) and Premature ball joint wear.
Is the Renault Grand Modus reliable?
The Renault Grand Modus has 0 dangerous and 5 major known issues. No dangerous issues are tracked, which is a positive sign.
How much does it cost to fix Renault Grand Modus problems?
Repair costs range widely. The most significant issue (Excessive smoke emissions (1.5 dCi diesel)) costs £300–£800 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.