Renault Ll29 Dci 100 MOT Failures
An analysis of 4,600 real DVSA MOT tests on the Renault Ll29 Dci 100 — what fails, how often, and how that compares to every other car on UK roads. Generations covered: LL29 (2002–2012).
Where the Renault Ll29 Dci 100 fails its MOT
The single biggest MOT failure point on the Renault Ll29 Dci 100 is light unit fault — this model is 21 times more likely to fail on this item than the average car on UK roads. That makes it a significant weak point for anyone buying or owning this model. Across 4,600 MOT tests, 6.55% of all Renault Ll29 Dci 100 tests recorded this as a failure.
Lighting faults are usually straightforward to fix (bulbs, connectors, earth points) but can indicate deeper wiring issues on older cars. Check all lights including fog lamps, number plate lights, and dashboard warning lights.
Other notable weak points include indicator or hazard warning switch inoperative (22x the fleet average), stop lamp missing, inoperative or in the case o... (9.2x the fleet average), suspension pin, bush or joint worn (7.0x the fleet average), and track rod ends worn (6.0x the fleet average). These ratios compare the Renault Ll29 Dci 100's failure rate on each item against the national average for all cars tested — a ratio of 10x means this model fails ten times more often than a typical car.
The failures span 4 categories: Lights & Electrics, Suspension, Steering, Seatbelts & Airbags. If you're inspecting a Renault Ll29 Dci 100 before purchase, these are the areas to focus on — and if any have been flagged as advisories on a previous MOT, they're likely to become failures in the near future.
Found a Renault Ll29 Dci 100 you like?
Check its dealer service history before you commit.
£6.99 · Full refund if no records found
Known issues beyond the MOT
An MOT only tests roadworthiness at a single point in time — it won't catch developing faults, intermittent problems, or issues that haven't yet reached the failure threshold. These are the issues that Renault Ll29 Dci 100 specialists and owners flag most frequently, drawn from manufacturer technical bulletins, workshop data, and verified owner reports.
Subframe corrosion at mounting points (LL29) Dangerous
The rear subframe mounting points on the LL29 suffer from corrosion that weakens the structural connection between the subframe and body shell. Affects LL29; typical independent garage repair cost is £800–£1,500.
Suspension bush and joint wear (LL29) Major
The front and rear suspension bushes and ball joints on the LL29 show accelerated wear compared to similar vehicles. Affects LL29; typical independent garage repair cost is £250–£450.
Steering ball joint wear (LL29) Major
The steering ball joints, particularly the track rod ends, develop excessive wear and free play at high mileage. Affects LL29; typical independent garage repair cost is £120–£250.
Shock absorber failure (LL29) Major
The shock absorbers on the LL29 fail at 3.0 times the fleet average rate, typically through internal seal failure causing oil leakage. Affects LL29; typical independent garage repair cost is £200–£350.
For the complete picture — including repair costs across independent, specialist, and dealer garages — see the full Renault Ll29 Dci 100 common problems breakdown.
What to check before buying a Renault Ll29 Dci 100
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Renault Ll29 Dci 100:
Lights & Electrics — check for light unit fault, indicator or hazard warning switch inoperative, stop lamp missing, inoperative or in the case o.... Suspension — check for suspension pin, bush or joint worn.
Beyond the MOT items, ask specifically about subframe corrosion at mounting points and suspension bush and joint wear. These won't show up on a standard MOT but can be expensive to fix — repairs start from £800. A specialist pre-purchase inspection is worth the investment on this model.
Always check the car's full MOT history for patterns — recurring advisories often become failures within 12 months. And verify the service history to confirm maintenance has been kept up to schedule. Enter any reg into our free car check to see the complete picture.
Check this Renault Ll29 Dci 100's service history
See every franchised dealer visit, dates, mileage readings, and work done. Know whether the maintenance that prevents these MOT failures was actually done.
£6.99 · Full refund if no records found
Renault Ll29 Dci 100 MOT FAQs
What are the most common MOT failures on a Renault Ll29 Dci 100?
Based on 4,600 DVSA MOT tests, the most common failure is light unit fault — at 21x the national fleet average. Other frequent failures include indicator or hazard warning switch inoperative and stop lamp missing, inoperative or in the case o....
Is the Renault Ll29 Dci 100 reliable based on MOT data?
The Renault Ll29 Dci 100 has 6 MOT failure categories above the fleet average. Specialists also flag subframe corrosion at mounting points as a concern. A pre-purchase inspection and service history check are recommended.
What MOT failures should I expect at high mileage?
Above 100,000 miles, the Renault Ll29 Dci 100 most commonly fails on indicator or hazard warning switch inoperative and light unit fault. Under 60,000 miles, the main issues are .
How do I check a Renault Ll29 Dci 100's MOT history?
Enter the registration number into our free car check above. You'll see every MOT test result, advisories and failures, mileage readings, write-off status, and finance checks.
MOT failure data sourced from DVSA bulk test records via data.gov.uk. Ratios compare this model's failure rate against the national fleet average. Known issues sourced from manufacturer bulletins, specialist workshops, and verified owner reports.