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M4 crash in Swansea on 17 November 2025 at 17:09 involving a BMW 3 Series

A BMW 3 Series and a Mazda CX-5 were involved in a crash on the M4 in Swansea at 17:09 on Monday 17 November 2025. A 31-year-old female passenger in the BMW 3 Series was slightly injured.

It happened in daylight in fine but windy weather on a dry dual carriageway with a 70 mph limit, away from any junction.

Severity
Slight
Date
17 Nov 2025
Monday, 17:09
Vehicles
2
BMW 3 Series and Mazda CX-5
Casualties
1
1 slightly injured

Location of the crash

Police recorded the crash at latitude 51.6776, longitude -3.91094, in the SA6 postcode district. It is one of the crashes that make up the Morriston, Swansea, SA6 6RX area accident hotspot.

Map of where the crash happened in Swansea

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  • 1 crash
  • Slight

Collision details

Basic information

Reference
2025622600010
Council area
Swansea
Police force
South Wales
Police attended the scene
Yes

Road and location details

First road class
Motorway
First road number
4
Road type
Dual carriageway
Speed limit
70 mph
Urban or rural
Rural

Junction information

Junction type
Not at junction or within 20 metres

Pedestrian crossing information

Crossing facilities
No physical crossing facility within 50 m

Environmental conditions

Light conditions
Daylight
Weather
Fine with high winds
Road surface
Dry

Enhanced collision data

How severity was recorded
From injuries recorded by police (CRASH system)
Estimated chance it was serious
0%
Estimated chance it was slight
100%

The 6 nearest recorded crashes

The nearest, 12 metres away, was a slight injury crash on 26 December 2002.

Vehicles involved (2)

  • Vehicle 1: BMW 3 Series

    Car

    Manoeuvre
    Going ahead
    Travelling from
    South East
    Travelling to
    North West
    Position at junction
    Not at or within 20 metres of junction
    First point of impact
    Front
    Left-hand drive
    No
    Driver sex
    Male
    Driver age
    32 years
    Engine capacity
    1,995 cc
    Fuel or propulsion
    Diesel
    Driver home area deprivation
    10% most deprived
    Distance from driver's home
    Within 5 km

  • Vehicle 2: Mazda CX-5

    Car

    Manoeuvre
    Going ahead
    Travelling from
    South East
    Travelling to
    North West
    Position at junction
    Not at or within 20 metres of junction
    First point of impact
    Back
    Left-hand drive
    No
    Driver sex
    Female
    Driver age
    59 years
    Engine capacity
    1,998 cc
    Fuel or propulsion
    Petrol
    Driver home area deprivation
    20 to 30% most deprived
    Distance from driver's home
    20 to 100 km

Casualties (1)

  • Casualty 1: Passenger

    Slight

    Female, aged 31, car occupant, in vehicle 1 (BMW 3 Series)

    Car passenger
    Front seat passenger
    Home area deprivation
    10% most deprived
    Distance from home
    Within 5 km

Data source

This record comes from the Department for Transport’s road safety data (STATS19), in which police forces in Great Britain record every road crash reported to them where someone was injured. It is reference 2025622600010 in the data published on GOV.UK under the Open Government Licence v3.0, and one of the crashes counted in the Swansea road accident statistics for 2025.