The two limitation clocks that apply to diesel claims
Clock 1: 6 years from purchase/agreement date
For breach of statutory duty claims, the clock starts on the date you purchased or leased the vehicle. For a car bought in 2016, the 6-year window expired in 2022. However, Clock 2 may keep you alive.
Clock 2: 3 years from date of knowledge
The clock starts when you first became aware (or should have been aware) that defeat device software falsified your vehicle’s emissions. This is the critical question for many claimants — and courts have not yet definitively resolved when “knowledge” arose.
When does “knowledge” arise for diesel claims?
Defendants argue knowledge arose in September 2015 (Dieselgate headline news) making the 3-year window expire in 2018. Claimants argue knowledge only arose when they specifically learned their vehicle’s specific defeat device affected them — which for many manufacturers was 2019–2022. Courts are still resolving this tension.
The consequence of getting this wrong
If your limitation period has expired and a court agrees, your claim is permanently time-barred. You cannot recover compensation regardless of the merits. This is why acting now — before any further time passes — is critical.
Approximate deadline position by manufacturer
How to protect your diesel emissions claim before the deadline
Register with a specialist solicitor today — free, no commitment
Registering places your claim formally on record. The solicitor will assess your limitation position and advise on next steps. This costs nothing and does not commit you to proceedings.
Gather your vehicle purchase documents
Find your original purchase invoice or registration document, finance agreement if applicable, and the V5C logbook showing first registration date. These establish your purchase date and vehicle specification.
Check if your vehicle was recalled
A recall letter from your manufacturer or an DVSA recall record confirms your vehicle was in the affected batch. This is strong evidence for both eligibility and the knowledge question.
Frequently asked questions
How the limitation clock works in practice
Limitation is the single most misunderstood part of a diesel claim, so a worked example helps. Imagine you bought a Volkswagen Golf diesel in March 2016.
The 6-year clock from purchase
Counting six years from March 2016 gives a deadline of March 2022. On a strict reading of the purchase-date rule, that window has already closed — which is exactly why defendants argue this date applies.
The 3-year clock from knowledge
If you did not personally understand that your specific vehicle was affected until, say, 2021 (when your model was named in UK group litigation), the three-year knowledge clock could run to 2024. The argument turns on when a reasonable person in your position would have had the knowledge needed to bring a claim.
Why the courts haven't settled this
Defendants say the September 2015 Dieselgate headlines gave everyone "knowledge". Claimants say general news is not the same as knowing your own vehicle was affected and that you had a viable claim. UK courts are still working through this distinction, and the answer may differ between manufacturers and even individual claimants.
The practical lesson is simple: do not try to calculate your own deadline and assume you are out of time. The knowledge-based extension is precisely the kind of argument that requires a specialist's assessment of your individual circumstances.
What actually "stops the clock"?
A common misconception is that registering with a claims firm stops the limitation clock. It does not. What legally protects your position is the issue of court proceedings — a Claim Form filed at court in your name, or your inclusion in a Group Litigation Order before the relevant cut-off. Registering with a specialist is the step that gets you assessed and, where appropriate, added to proceedings before any deadline. The registration itself is free and commits you to nothing; it simply ensures you are in the queue to be properly assessed while time remains.