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BYD Dolphin Common Problems, Faults & Repair Costs (2026)

Based on official DVSA MOT test data. View the most common MOT failure categories, pass rates, and estimated repair costs for the BYD Dolphin (2023–present).

MOT Pass Rate

90.2%8.2% above national avg (82%)

Reliability rating: Excellent — based on approx. 2,000 tests

Dangerous Defects

0.70%

Low risk

Retest Rate

7.0%

of failed tests need a retest

Top MOT Failure Categories

1

Lamps, reflectors and electrical equipment

Est. repair: £40–£200

10.0%
2

Suspension

Est. repair: £120–£450

8.0%
3

Brakes

Est. repair: £100–£350

7.2%
4

Tyres

Est. repair: £50–£120 per tyre

8.5%
5

Exhaust, fuel and emissions

Est. repair: £40–£200

1.8%

Where Faults Occur

26.0%

Front

24.0%

Rear

18.0%

Offside

Mileage Benchmarks

At 3 years

N/A

At 5 years

N/A

At 10 years

N/A

Significantly higher or lower mileage than these benchmarks may indicate unusual usage patterns. Check the full MOT history for mileage consistency.

Is a BYD Dolphin a Good Buy?

The BYD Dolphin demonstrates above-average reliability based on MOT test data, with a 90.2% pass rate. This places it 8.2% above the national average, suggesting lower ongoing maintenance costs compared to many competitors.

While no car is without faults, lamps, reflectors and electrical equipment issues are the most common concern, affecting approximately 10.0% of failed tests. These tend to be relatively affordable to fix at £30–£150.

BYD Dolphin MOT Check & History

View detailed MOT pass rates by year, mileage benchmarks, and full test history data for the BYD Dolphin.

View BYD Dolphin MOT Data

Check a Specific BYD Dolphin

Enter a registration number to view the full MOT history for any BYD Dolphin.

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Other BYD Models

BYD Atto 3

89.5%

Lamps, reflectors and electrical equipment →

BYD Seal

91.0%

Lamps, reflectors and electrical equipment →

View all BYD models

Frequently Asked Questions

What are the most common MOT faults on a BYD Dolphin?
The top MOT failure on the BYD Dolphin is Lamps, reflectors and electrical equipment, accounting for approximately 10.0% of all failures. Other common issues include suspension and brakes.
What is the BYD Dolphin MOT pass rate?
The BYD Dolphin has an estimated MOT pass rate of 90.2%, which is 8.2% above the national average of 82%. This rates the BYD Dolphin as "Excellent" for MOT reliability.
Is the BYD Dolphin reliable?
Based on DVSA MOT data, the BYD Dolphin has a excellent reliability record with a 90.2% pass rate. It has a dangerous defect rate of 0.70% and a retest rate of 7.0%.
How much does it cost to fix common BYD Dolphin MOT failures?
Typical repair costs for BYD Dolphin MOT failures range from £30–£200 for lamps, reflectors and electrical equipment issues to £120–£450 for suspension problems. Prices are estimates based on typical UK independent garage rates.
What mileage should a BYD Dolphin have?
Based on MOT test data, the average BYD Dolphin covers approximately N/A by 3 years, N/A by 5 years, and N/A by 10 years. Significantly higher or lower mileage may warrant closer inspection.
Should I buy a used BYD Dolphin?
The BYD Dolphin is generally a solid choice based on MOT data. Check the full MOT history of any specific vehicle before purchasing, paying particular attention to lamps, reflectors and electrical equipment issues and mileage consistency.
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