Ford
Fiesta ST Line X Edition Turbo
3,683 MOT tests analysed. sits above the UK fleet average — here's where Fiesta ST Line X Edition Turbos pass, fail, and end up on the retest sheet.
That's 8.8 points above the UK fleet average across our 1,984 tracked models — a confident result.
Pass
86.3%
Pass-after-fix
4.3%
Fail
8.9%
Avg miles
29,882
Pass + Pass-after-fix + Fail = 100%
Petrol cars first registered from January 2006 meet Euro 4 — compliant in London ULEZ, Birmingham CAZ, Bristol CAZ, and Glasgow LEZ.
The picture
Fiesta St-Line X Edition Turbo: above-average pass rates, with caveats
Across 2,111 MOT tests, the Fiesta St-Line X Edition Turbo returns 81.3% first-time pass — above the UK fleet average. The single most-logged Major fail is tyre tread under the limit. A seriously damaged tyre and headlamp aim out of spec round out the top three. Average tested mileage sits at 22,426, which is the lens to read those failure rankings through. If you own one and the next test is close, the ranked list below is a sensible pre-test checklist.
ABI Insurance Group
Group 3–19
Below the fleet average — generally reasonable to insure. Lower groups cost less to insure; UK fleet average is around Group 22.
Source: ABI Group Rating Panel · administered by Thatcham Research · groups cover standard variants; performance trims may sit higher. Browse all insurance groups →
3–19
out of 50
Top ten reasons for rejection.
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- 01
Tyre tread depth not in accordance with the requirements
74 occurrences · 2.0% of tests
- 02
A tyre seriously damaged
37 occurrences · 1.0% of tests
- 03
A tyre seriously damaged
35 occurrences · 1.0% of tests
- 04
Windscreen or window damaged or seriously discoloured but not adversely affecting driver's view
25 occurrences · 0.7% of tests
- 05
A tyre cords visible or damaged
24 occurrences · 0.7% of tests
- 06
a brake lining or pad worn below 1.5mm
18 occurrences · 0.5% of tests
- 07
The aim of a headlamp is not within limits laid down in the requirements
16 occurrences · 0.4% of tests
- 08
Lambda coefficient outside the default limits or the range specified by the manufacturer
13 occurrences · 0.4% of tests
- 09
Engine MIL illuminated indicating a malfunction
10 occurrences · 0.3% of tests
- 10
Lamp not securely attached
9 occurrences · 0.2% of tests
Counts cover Major and Dangerous defects logged at test. Advisory items excluded so this shows why a car was rejected, not just what the tester flagged in passing.
Worst-case fix budget · top 2 failures
£120–£190
If every one of this Fiesta ST Line X Edition Turbo's most-logged Major fails hit at the same MOT, that's the real-world UK garage range. Reality is usually one or two items, not all of them. Open the estimator →
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Tools that pre-empt a retest.
Picked against this car's top failure patterns. Affiliate links to Amazon UK — we earn a small cut at no cost to you. Disclosed up-front, doesn't shape the data.
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Parts & supplies for this fix
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Owner reports · Honest John
What owners actually report.
Verbatim faults logged by owners on honestjohn.co.uk over recent years. We didn't summarise — these are the words people typed in.
What's good
The Ford Fiesta is the first car many people ever drive and, for many, it’s all the car they will ever need. Its versatility, low running costs and practicality are all at their best in this generation of Ford’s superlative hatchback.
Where it falls short
Several Fiesta models including Vignale now list at more than £20,000.
Recent owner-reported faults
- 5 Jul 2023
Report of a one year old Ford Fiesta Ecoboost MHEV where the 12v battery keeps running down so the air con will not work.
- 15 Dec 2021
Heater failure on 2017 Ford Fiesta 1.0 EcoBoost The heater fan ceased to work on two occasions in any position except four, the highest. Each time the repair was done by fitting a new resistor. The latest repair failed again. Ford dealer now thinks that to effect a proper repair a new heater motor will have to be fitted. They say that five and a half hours labour will be required as access has to be carried out through the dashboard. The new motor will cost approximately £400 and the total bill will come to just over £1000. Unclear if the dealer or Ford will contribute towards the cost of the repair.
- 6 Dec 2021
Problems reported with 2021 1.0 mHEV Fiesta. After three weeks of ownership there were problems with the passenger door touch sensitive unlocking. Owner took the car back to the dealer who said it was because the 12v battery was low (40 per cent). They suggested that because the owner only does around 100 miles a week and the hybrid system is only really charging the hybrid battery, so the standard one is likely to regularly run down.
- 23 Jul 2020
Report of 2020 Ford Fiesta breaking down on the drive home from the dealership. Engine warning light appeared on the dashboard with the message "low oil pressure". Dealership recovered the car and stated it needed parts to be ordered from Germany and the owner would have the car back in a week. Owner is rejecting the car under the consumer rights act 2015.
- 9 Nov 2019
Complaint about Sync3 not working in a 2018 Ford Fiesta 1.0 Ecoboost ST-Line automatic. The Sync 3 system includes the Sat Nav, yet, even though it has WiFi it doesn’t update. Owner has tried downloading satnav updates to a USB to update but it doesn’t work. Sat nav goes blank, all roads disappear and he can only see the red arrow. This happens just about every day. The car has been back to the dealers and they have applied all available updates but confirm it’s not fixed until Ford provides a permanent fix. Owner having to try to use Apple Carplay and Google Maps.
- 22 Sep 2019
Report of audible warning and light coming on in brand new Ford Fiesta 1.0 Ecoboost, then going off before driver can work out what it is for. It will be the petrol particulate filter warning which then self-cleans so the warning goes off.
- 6 Aug 2019
Report of battery regularly going flat in a 2017 Ford Fiesta.
- 18 Jul 2019
Strange issue reported with June 2018 Ford Fiesta 1.1 Titanium, bought used at 5199 miles in May 2019. Yellow spanner came up on the display (indicating a malfunction) and the engine lost power for about 5-6seconds, then regained full power, carried on for about a quarter of a mile and lost power again.
- 25 Jun 2019
Report of stop-start function of new shape 2017 Fiesta 1.0litre Auto only cutting in on a couple of ocassions since purchase used 12 months previously. Back to the dealer twice but each time they say cannot find anything wrong with diagnostics. Owner says battery cannot be being charged sufficiently or is faulty otherwise the function would work. Does reasonable mileages and have had the battery go flat when car was unused for 4 days.
- 4 Jun 2019
Complaint of 2017/67 Ford Fiesta refusing to unlock with the fob or the spare. Called AA who told her how to open the car manually with the hidden key, but that it's a known Fiesta fault where the keys forget the car and require a "software update". Both keys started working again. Supplying dealer said all they could do was replace both batteries and refused to acknowledge the fact that both keys miraculously started working again. Ford UK has denied any knowledge of an issue or a software update.
- 2 Apr 2019
Report of 2017 new model Fiesta bought new in November 2017 running down its battery after having been left unused for 2-3 weeks.
- 21 Feb 2019
Report of failure of the manual transmission of a 2018 Ford Fiesta 1.1 Zetec bought at 9 months old. On attempting to drive it home the new owner found he could not change gear. The car was then recovered by the AA, returned to the showroom and owner demanded a return of the vehicle and an immediate refund, which he eventually got in full. The Ford dealer subsequently informed him that this was, apparently, an occasional problem on Fiestas.
Source: honestjohn.co.uk · 13 reports indexed, top 12 shown
Buying or keeping a Fiesta ST Line X Edition Turbo?
Use the failure ranking as a pre-test checklist or a haggling lever. Treat the headline pass rate as a fleet-wide trend, not a guarantee on any individual car.
If you own a Fiesta ST Line X Edition Turbo and your last MOT looked nothing like the ranked failures above, that's normal — individual cars vary widely. The ranking shows the patterns testers flag most often across the country.