Vehicle summary
ULEZ status is estimated based on fuel type and registration year. It may not reflect the actual emission standard of this vehicle. Check with TfL for a definitive answer.
At a glance
This 2003 Bmw 3 Series Petrol 2494cc has had 14 MOT tests on record, passing 9 and failing 5 (64% pass rate). It has 144,160 miles on the clock, averaging 16,680 miles per year, above the UK average of 7,400. The 2.5i engine is known for m54b25. Common Bmw 3 Series issues include rear subframe mount cracking (racp failure) and front lower control arm bushings.
MOT & Mileage History for KB03 NBZ
Data from DVSA. Last updated August 2026. Check gov.uk for the latest.
MOT failures recorded
Average miles/year
Gap in MOT history
Mileage Analysis
Above average| Latest reading | 144,160 miles |
| Reading date | |
| Miles last year | 1,473 |
| Average per year | 16,680 |
| Mileage consistency | Consistent |
Check KB03 NBZ
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Full MOT Test History 14 tests on record
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Reported issues for this Bmw 3 Series
These are the most commonly reported problems on Bmw 3 Series models (1998–2006), based on owner reports and workshop data across the UK.
Rear Subframe Mount Cracking (RACP Failure)
Fatigue cracks develop at the mounting points due to corrosion and stress; BMW's foam injection "fix" often fails, leading to subframe tearing. Affects **ALL body styles** (saloon, estate, coupe, convertible). · Typical repair: £800-£2,000 (reinforcement plates + welding at indie BMW specialist; foam fix £300 but inadequate).
Front Lower Control Arm Bushings
Rubber cracks/splits, causing excessive movement. Affects **ALL body styles**. · Typical repair: £200-£400 (bush press + alignment at indie).
Window Regulators
Cables fray or pulleys break, jamming mechanism. Affects **ALL body styles** (worse on coupes/convertibles with frameless windows). · Typical repair: £150-£300 per door (regulator + motor at indie).
Cooling System Leaks (Non-Engine Specific)
Plastic cracks from age/heat cycles; excludes water pump (engine-related). Affects **ALL body styles**. · Typical repair: £150-£350 (tank + hoses).
M54B25
Diaphragm ruptures or hoses clog, pressurising crankcase and pushing oil into intake.
Common faults, what to check, and what to pay
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Vehicle Details
| Registration | KB03 NBZ |
| Make | Bmw |
| Model | 3 Series |
| Colour | Silver |
| Fuel type | Petrol |
| Engine | 2494cc |
| Year | 2003 |
| First registered | |
| Area code | KB — Northampton, Luton and Northampton |
| Age identifier | 03 — March 2003 to August 2003 |
More KB03 N plates
Browse all KB03 N registrations from Northampton.
About KB03 NBZ
What car is KB03 NBZ?
KB03 NBZ is a silver Bmw 3 Series, petrol (2494cc). First registered in Northampton in 2003.
What is the mileage of KB03 NBZ?
The last recorded mileage for KB03 NBZ was 144,160 miles, recorded on 12 Mar 2013 during its most recent MOT test.
Has KB03 NBZ passed its MOT?
KB03 NBZ has had 14 MOT tests with a 64% pass rate (9 passes, 5 failures). It last passed on 12 Mar 2013.
Is KB03 NBZ ULEZ compliant?
Based on its fuel type and registration year, KB03 NBZ is likely not ULEZ compliant. As a petrol vehicle registered in 2003, it typically does not meet the Euro 4 emission standard required. This is an estimate — confirm with TfL's ULEZ checker.
How old is KB03 NBZ?
KB03 NBZ is approximately 23 years old. Age identifier 03 means registered between 1 March 2003 and 31 August 2003.