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KN09 UNZ

2009 Mercedes-benz B-class

Silver Diesel 1991cc
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MOT Status

Valid
Expires22 Jul 2027
Tests18 (15 pass, 3 fail)
Pass rate83.3%

Mileage

135,844 mi
Last recorded135,844 miles
Recorded on17 Jul 2026
Typical for 2009 Mercedes-benz B-class63,922 mi

Significantly above average — investigate

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

RegistrationKN09 UNZ
MakeMercedes-benz
ModelB-class
Year2009
ColourSilver
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

15 pass 3 fail
Pass 17 Jul 2026 135,844 miles
Fail 15 Jul 2026 135,842 miles

Brake lever has insufficient reserve travel (1.1.2 (a))

Front Brake disc significantly and obviously worn Both (1.1.14 (a) (i))

Nearside Rear Parking brake inoperative on one side (1.4.1 (a))

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

Offside Rear Parking brake inoperative on one side (1.4.1 (a))

Rear Brakes imbalanced across an axle (1.2.1 (b) (i))

Rear Brakes imbalanced across an axle Axle 2 (1.2.1 (b) (i))

Supplementary restraint system warning lamp indicates a fault (7.1.6 (a))

Front Brake pad(s) less than 1.5 mm thick (1.1.13 (a) (ii)) DANGEROUS

Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) DANGEROUS

Pass 23 Jul 2025 128,655 miles

N/S/F Wing mirror casing damaged

Fail 14 Jul 2025 128,640 miles

Exhaust has a major leak of exhaust gases (6.1.2 (a))

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

Offside Front Coil spring fractured or broken (5.3.1 (b) (i))

Fuel system component leaking excessively or a risk of fire Filler (6.1.3 (b) (ii)) DANGEROUS

N/S/F Wing mirror casing damaged

Pass 12 Jul 2024 117,008 miles

Central Exhaust has a minor leak of exhaust gases (6.1.2 (a))

Fuel Pipe/s corroded Tank

Pass 14 Jul 2023 101,755 miles

Brake pipe corroded, covered in grease or other material all brake pipes (1.1.11 (c))

Central Exhaust has a minor leak of exhaust gases silencer corroded (6.1.2 (a))

Nearside Rear Coil spring corroded (5.3.1 (b) (i))

Offside Front Side repeater with a multiple light source up to 1/2 not functioning (4.4.1 (a) (i))

Offside Rear Fuel hose deteriorated fuel filler hose/pipes corroded (6.1.3 (c) (ii))

Oil leak, but not excessive engine (8.4.1 (a) (i))

Pass 14 Jul 2022 89,015 miles

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

Nearside Rear Coil spring corroded (5.3.1 (b) (i))

Offside Rear Fuel hose deteriorated fuel filler hose corroded (6.1.3 (c) (ii))

Pass 2 Jul 2021 75,507 miles

Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))

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

Fail 2 Jul 2021 75,507 miles

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

Rear Brake disc significantly and obviously worn (1.1.14 (a) (i))

Rear Brake pad(s) less than 1.5 mm thick (1.1.13 (a) (ii)) DANGEROUS

Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))

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

Pass 1 Jul 2020 69,132 miles
Pass 11 Jul 2019 61,637 miles

Nearside Nail in tyre

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

Nearside Rear Tyre slightly damaged misshaped (5.2.3 (d) (ii))

Offside Rear Tyre slightly damaged misshaped (5.2.3 (d) (ii))

Pass 18 Jun 2018 52,079 miles
Pass 22 Jun 2017 45,070 miles
Pass 1 Jul 2016 41,995 miles
Pass 7 Jul 2015 38,816 miles

corrsion exhaust.

corrsion suspension components.

slight play steering rack.

Pass 15 Jul 2014 35,916 miles

body damage.

corrsion to exhaust.

Pass 5 Jul 2013 29,288 miles

corrosion suspension components

corrosion to all brake discs

rear tyres 3mm

Pass 16 Jul 2012 23,602 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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KN09 UNZ is a 2009 Mercedes-benz B-class in Silver with a 1,991cc diesel engine. This vehicle has been through 18 MOT tests with a personal pass rate of 83.3%.

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 performed better than the average for its year.

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 KN09 UNZ, 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 KN09 UNZ?

You can check the full history of KN09 UNZ by running a full vehicle check. This shows you finance, stolen, write-off, MOT history, mileage records and more.

What year was KN09 UNZ registered?

KN09 UNZ is a 2009 Mercedes-benz B-class, first registered on 31 March 2009.

Is KN09 UNZ safe to buy?

The MOT history for KN09 UNZ shows 18 tests with a 83.3% pass rate. To check for outstanding finance, stolen markers, write-off history and mileage discrepancies, run a full vehicle check.

Does KN09 UNZ 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 KN09 UNZ. 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.