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J4 UNT

2009 Mercedes-benz B-class

White Diesel 1991cc
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MOT Status

Valid
Expires29 Dec 2026
Tests19 (14 pass, 5 fail)
Pass rate73.7%

Mileage

82,562 mi
Last recorded82,562 miles
Recorded on16 Dec 2025
Typical for 2009 Mercedes-benz B-class63,922 mi

Above average mileage for this year

4 checks still locked for this Mercedes-benz
Stolen
Finance
Write-off
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Vehicle Details

RegistrationJ4 UNT
MakeMercedes-benz
ModelB-class
Year2009
ColourWhite
Fuel typeDiesel
Engine1,991cc

All premium checks include

50+ data points
Finance Check (Experian) Insurance Write-off Salvage Auction Stolen Check Previous Owners Ex-Taxi, Police, NHS Mileage Anomaly Import / Export Scrapped Check Plate Changes

MOT History

14 pass 5 fail
Pass 16 Dec 2025 82,562 miles

Nearside Rear Brake pipe corroded, covered in grease or other material (1.1.11 (c))

Offside Front Play in steering rack inner joint(s) ()

Offside Front Shock absorbers has light misting of oil (5.3.2 (b))

Rear Brake pipe corroded, covered in grease or other material N/S to O/S (1.1.11 (c))

Pass 16 Dec 2024 74,792 miles

Front Service brake binding but not excessively both sides (1.2.1 (f))

Nearside Front Brake pad(s) wearing thin (1.1.13 (a) (ii))

Nearside Rear Brake pipe corroded, covered in grease or other material corroded (1.1.11 (c))

Rear Brake pipe corroded, covered in grease or other material n/s to o/s - corroded (1.1.11 (c))

Fail 16 Dec 2024 74,790 miles

Nearside Front Shock absorbers has a serious fluid leak (5.3.2 (b))

Front Service brake binding but not excessively both sides (1.2.1 (f))

Nearside Front Brake pad(s) wearing thin (1.1.13 (a) (ii))

Nearside Rear Brake pipe corroded, covered in grease or other material corroded (1.1.11 (c))

Rear Brake pipe corroded, covered in grease or other material n/s to o/s - corroded (1.1.11 (c))

Pass 19 Dec 2023 63,355 miles

Rear Brake pipe corroded, covered in grease or other material both sides (1.1.11 (c))

Fail 13 Dec 2023 63,351 miles

Front Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt both sides inner drive shaft boot split (6.1.7 (g) (ii))

Offside Front Suspension arm ball joint excessively worn lower arm (5.3.4 (a) (i))

Rear Brake pipe corroded, covered in grease or other material both sides (1.1.11 (c))

Pass 7 Dec 2022 52,420 miles

Nearside Front Tyre slightly damaged tyre kerb damaged/split outer sidewall area (5.2.3 (d) (ii))

Offside Front Inner Drive shaft joint constant velocity boot severely deteriorated evidence of grease splatter around boot - suspect split boot - unable to fully inspect as under covers fitted - advise diagnostic/repair (6.1.7 (g) (i))

Offside Rear Tyre worn close to legal limit/worn on edge tyre worn inner edge very close to allowed limits - tread across tyre @2mm - advise change asap (5.2.3 (e))

Pass 30 Dec 2021 39,289 miles

Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))

Fail 29 Dec 2021 39,289 miles

Nearside Front Tyre tread depth below requirements of 1.6mm 215/40/18 (5.2.3 (e)) DANGEROUS

Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))

Pass 9 Oct 2020 27,343 miles
Fail 9 Oct 2020 27,343 miles

Nearside Rear Coil spring fractured or broken (5.3.1 (b) (i))

Pass 11 Apr 2019 14,889 miles
Fail 11 Apr 2019 14,889 miles

Front Suspension arm ball joint excessively worn both suspension arm bottom ball joints worn to excess (5.3.4 (a) (i))

Pass 3 Apr 2018 11,305 miles
Pass 22 Mar 2017 10,761 miles
Pass 17 Mar 2016 10,117 miles
Pass 27 Mar 2015 9,511 miles
Pass 8 Apr 2014 8,354 miles
Pass 16 Apr 2013 7,585 miles
Pass 16 Apr 2012 6,495 miles

How Reliable is the Mercedes-benz B-class?

Based on 984,871 MOT tests across 77,700 vehicles.

79.4%
Pass Rate
5,590
Miles/Year
21
Year Lifespan
77,700
On UK Roads

Top MOT Failure Points

Tyre tread depth below requirements of 1.6mm 6,159
coil spring broken 5,250
Full Mercedes-benz B-class reliability report

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J4 UNT is a 2009 Mercedes-benz B-class in White with a 1,991cc diesel engine. This vehicle has been through 19 MOT tests with a personal pass rate of 73.7%.

Across all 2009 Mercedes-benz B-class models, the average MOT pass rate is 76.4% with a typical mileage of 63,922 miles. This particular vehicle has a lower pass rate than the average for its year, which may indicate maintenance issues worth investigating.

The most common reason a Mercedes-benz B-class fails its MOT is tyre tread depth below requirements of 1.6mm, accounting for 6,159 recorded failures. If you're considering buying J4 UNT, it's worth having these areas checked by a mechanic before committing.

The Mercedes-benz B-class typically stays on UK roads for around 21 years. At 17 years old, this Mercedes-benz B-class is approaching the upper end of the typical lifespan for this model.

Frequently Asked Questions

How do I check the history of J4 UNT?

You can check the full history of J4 UNT by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was J4 UNT registered?

J4 UNT is a 2009 Mercedes-benz B-class, first registered on 16 April 2009.

Is J4 UNT safe to buy?

The MOT history for J4 UNT shows 19 tests with a 73.7% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does J4 UNT have outstanding finance?

Finance checks require a premium vehicle report. This checks against all major UK finance providers to see if there is any outstanding finance on J4 UNT. If you buy a car with outstanding finance, the finance company can repossess it.

No warranty or guarantee of accuracy is provided for any free data on this page. The data guarantee applies only to information obtained through the purchase of a full check.