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How to Claim for Diesel Emissions Mis-Selling

Guide to claiming for mis-sold diesel vehicles, emissions misrepresentation, and Clean Air Zone charge disputes.

8 min read
Updated 2 February 2026

Step-by-Step Guide

1

Check if your vehicle is affected

15 mins

Determine if your vehicle was part of emissions recalls or is subject to Clean Air Zone charges contrary to what you were told.

Tip: Check manufacturer recall notices and CAZ checker tools for your vehicle.

2

Gather purchase documentation

15 mins

Collect sales documents, marketing materials, and any claims made about emissions or charges when you bought.

3

Calculate your loss

15 mins

Work out the financial impact: CAZ charges paid, reduced resale value, fix costs.

4

Contact the dealer

10 mins

Write to the dealer who sold you the vehicle explaining the misrepresentation.

5

Send letter before claim

10 mins

Send formal letter before claim with your calculated losses.

6

File your claim

15 mins

File via Money Claim Online against the dealer (not manufacturer for small claims).

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Understanding Diesel Emissions Claims

If you were sold a diesel vehicle with misrepresentations about its emissions, charges, or environmental classification, you may have a claim for the difference in value or costs incurred.

Common scenarios: - Misrepresentation of emissions or vehicle classification - Clean Air Zone charges you were told would not apply - Vehicle affected by emissions scandal ("dieselgate") - Environmental claims that turned out to be false

Types of claim: - Against the dealer who sold you the car (misrepresentation) - Against the manufacturer (product liability - usually group actions) - Finance company if bought on credit

Evidence You Need

Essential evidence: - Purchase documentation - Marketing materials at time of sale - Technical specifications claimed - Evidence of actual emissions/charges

Helpful evidence: - Financial agreements - CAZ charge receipts - Expert reports on emissions - Recall notices from manufacturer

Tips: - Screenshot any online claims made about the vehicle - Keep records of all CAZ charges paid - Note any representations made by the salesperson

What You Can Claim

Typical claim value: £1,000 - £10,000

You can claim: - Difference in vehicle value (what you paid vs actual value) - Clean Air Zone charges incurred - Cost of emissions-related repairs or fixes - Consequential losses (e.g., having to change vehicle)

Limitation: Small claims limit is £10,000. Larger claims exist in group actions against manufacturers, but these are separate from individual dealer claims.

Clean Air Zone Claims

What is a CAZ? Clean Air Zones charge polluting vehicles to enter certain cities. Charges vary but can be £8-12.50 per day.

When you can claim: - You were told the vehicle would not incur charges - You were told it met a certain emissions standard but it does not - The classification changed after purchase due to manufacturer issues

Evidence needed: - What you were told at purchase - Actual vehicle classification - CAZ charges paid - Any attempts to get manufacturer fix

Frequently Asked Questions

Group actions against manufacturers can recover larger sums but take years and you lose control. Individual claims against dealers are faster, you control the process, but are limited to £10,000 in small claims. Consider both options.

Legal Disclaimer

This guide provides general information about UK small claims court procedures and is for educational purposes only. It does not constitute legal advice. CourtPilot is not a law firm and is not regulated by the Solicitors Regulation Authority. The law may have changed since this guide was last updated. For advice specific to your situation, please consult a qualified solicitor or seek help from Citizens Advice.

Related Guides

Industry-Specific Guidance

We have detailed guides tailored for specific industries facing these types of disputes.

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NOT A LAW FIRM | NOT REGULATED BY THE SRA | NOT PROVIDING LEGAL SERVICES

CourtPilot provides AI-powered information tools to help you understand UK small claims procedures. We are NOT qualified solicitors, NOT regulated by the Solicitors Regulation Authority, and do NOT provide legal advice or reserved legal services. All information is for educational and planning purposes only. You are responsible for your own legal decisions.

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