The picture
Rio Passes 75% — Electrical Faults on Early 1.0 Turbos
From 121,121 tests, the Kia Rio passes first time 74.97% of the time at an average test mileage of 62,906. Rear plate lamp failures, low tyre tread, and worn steering ball joints are the standard failure causes — typical for a small hatchback in this mileage range. Owners of the 1.0T-GDI variant introduced in 2017 have reported a pattern of electrical misbehaviour: phone connectivity dropping out, the radio losing clock memory, and lights activating in daylight. One car was returned to the dealer and no fault was found.
Steering ball joint wear is worth monitoring closely as the car ages past 60,000 miles. Otherwise the Rio has a broadly solid track record for a car in its class.
Top ten reasons for rejection.
- 01
A rear registration plate lamp or light source missing or inoperative in the case of multiple lamps or light sources
4,776 occurrences · 3.9% of tests
- 02
Tyre tread depth not in accordance with the requirements
3,754 occurrences · 3.1% of tests
- 03
A steering ball joint with excessive wear or free play
3,418 occurrences · 2.8% of tests
- 04
A suspension joint dust cover severely deteriorated
3,193 occurrences · 2.6% of tests
- 05
A suspension joint dust cover missing or no longer prevents the ingress of dirt etc
2,812 occurrences · 2.3% of tests
- 06
Wiper blade missing or obviously not clearing the windscreen
2,688 occurrences · 2.2% of tests
- 07
a brake lining or pad worn below 1.5mm
2,452 occurrences · 2.0% of tests
- 08
A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning
2,335 occurrences · 1.9% of tests
- 09
A suspension pin, bush or joint excessively worn
2,319 occurrences · 1.9% of tests
- 10
Wiper blade defective
2,220 occurrences · 1.8% 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 5 failures
£308–£850
If every one of this Rio'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.
Item 01 · Amazon UK
H7 / W21W bulb pack
A spare-bulb kit lives in the boot. Test morning is not the time to find your stop-lamp's gone.
Search Amazon UK
Item 02 · Amazon UK
Digital tyre-tread depth gauge
Five quid for a gauge beats £150 for a retest. UK MOT minimum is 1.6mm — most testers fail anything below 2mm to be safe.
Search Amazon UK
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.
Recent owner-reported faults
- 1 Jan 0001
Electrical problems reported with new Kia Rio 1.0T-GDI purchased August 2017. Faults have appeared with phone communication, radio clock memory and now with lights going on even though not dark. Returned end of October 2017 and car "looked at" with no fault found. Probably bettery related because car is not being regularly driven far enough. Friday: The IRS Is Forgiving Millions in Tax Debt Before the May Deadline freshstartinfo.org Ask a Pro: "How Long Does $1.5M Last in Retirement?"This quiz matches nearly 50,000 people each month with vetted financial advisors.SmartAsset Learn More North Charleston: AudioNova is giving free 30-minute hearing checks complete this short quiz to schedule your free hearing test AudioNova Top 5 Mouse Repellents for 2026 Expert Product Review Learn More People Born 1941-1971 Are Due A Large Surprise TheConsumerGuide Learn More Stop Wasting Groceries: The Fridge Mistake Most Households Make Consumer Check Sponsored IRS Cuts Millions in Tax Debt Before April 30th Deadline Learn More As the tax relief deadline nears, thousands of Americans are rushing to resolve their tax debts before the IRS imposes hefty penalties.Fresh Start Information Sponsored Why AI Brings Speech Clarity That Old Hearing Aids Just Can’t Match Understand speech in noise effortlessly AudioNova [![Image 32: Find Senior Women Who Bring The Spark [See Who's Online]](https://images.outbrainimg.com/transform/v3/eyJpdSI6IjIwN2QxY2ZhOGRlODY3YzNmZjc0N2Y0NDgxODc0MzJiMGE4MDEzODg0ZTZiMDIwY2MzZWQyYWNmMjViMDRjZTEiLCJ3Ijo0MDAsImgiOjMwMCwiZCI6MS4wLCJjaCI6MjAzNzE1NzAwNSwiY3MiOjAsImYiOjR9.webp)Sponsored Find Senior Women Who Bring The Spark [See Who's Online]It all starts with a message.amorelation.com Read more](https://amorelation.com/land/sp/17f2ebbb?utm_source=Outbrain&utm_medium=ua&utm_campaign=OBN_Amorelation_USA_All_Native_EU2_NewU_aOBX25_WL-exclude2_Creo-t_Text-t_mua_20Apr&campaign_id=004aea76c4e6e4694169bd0cc89a5ab731&utm_content=Find+Senior+Women+Who+Bring+The+Spark+%5BSee+Who%27s+Online%5D&partner=outbrain_datingsmatch&OutbrainClickId={{ob_click_id}}&subid={{ob_click_id}}&ad_id=00cb476e93938ef6545123d4a0ca2f0577&publisher_name={{publisher_name}}§ion_name={{section_name}}&publisher_id={{publisher_id}}&ad_name={{ad_name}}&obOrigUrl=true) Sponsored Has Hyundai hit the mark with the new Palisade? Take a look!caffeinecommons.com Click Here Sponsored The Ingredient Plumbers Use to Clear Clogged Drains Instantly Trending Deal Journal * Terms and Conditions * Privacy * Cookies * Advertise on this site * Contact * Mobile) Website of the Year 2016, 2017 & 2018
Source: honestjohn.co.uk · 1 reports indexed
Buying or keeping a Rio?
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 Rio 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.