If you do choose this option, be aware that ordering the filter, and getting it fitted and certified takes at least three months, so you need to act as early as possible and pay a daily charge if driving within the zone in the meantime.
It's important to fit an approved filter, as this is the only way to get the certificate to prove that your vehicle meets LEZ emissions standards.
Approved suppliers and their contact details can be found in the following document:
Approved equipment lists can be found in the following documents:
Accredited equipment manufacturers can advise you on approved filters for your particular vehicle. We recommend you contact several filter manufacturers and get a minimum of three quotes.
When requesting a filter quotation it's important that you provide (via email or phone):
We recommend that you seek a range of quotes before making a purchase.
We are not responsible for suppliers failing to respond or for the quotations received.
The table below includes details of accredited suppliers and the vehicles they have filters for:
|Lorries, buses, coaches and heavy specialist vehicles||Larger vans, minibuses and specialist diesel vehicles|
+44 1594 887414
|Astra Vehicle Technologies
+44 (0) 151 348 5777
+44 19 25 84 98 49
+44 (0)20 3689 2892
+44 (0)1427 810088
+44 (0) 1786 392 110
|HJS Emission Technology
+44 (0) 1344 566 050
|Pirelli Eco Technology
+44 (0) 1472 208 008
The supplier of your filter should be able to recommend an approved fitter, who will fit the filter into your exhaust system (often replacing the exhaust silencer).
Make sure you keep all the documentation for the engine and filter, as you'll need to provide this to the Driver and Vehicle Standards Agency (DVSA), formerly VOSA, to get a certificate for your filter.
DVSA are the government agency that carries out annual tests on all lorries, buses and coaches, and licences MOT garages. It also tests filters and issues all certificates showing that vehicles meet the LEZ standards.
Once your filter has been fitted, it'll need to be tested so you can get your Reduced Pollution Certificate (RPC) or Low Emission Certificate (LEC) to prove your vehicle meets the LEZ emissions standards. You can get a LEC for all types of vehicle, but RPCs are only issued to certain lorries, buses and coaches.
You can either have your filter tested by an Authorised Examiner or at a DVSA test station.
Each DVSA test costs £32. To find your nearest centre and book your test, call 0300 123 9000.
DVSA will examine your vehicle to confirm that the filter fitted is approved, and will carry out a smoke test to confirm that it's fitted and functioning correctly (the smoke test doesn't measure the particulate matter emissions of your vehicle). Once the test is successfully completed, DVSA will issue either a LEC or RPC and submit this to us automatically.
It may take up to 10 days for our database to be updated, so in the meantime, you'll need to pay the daily charge if you're driving in the LEZ.
You may find that the fitter of your filter is a DVSA Authorised Examiner (AE), which means they will be able to test your vehicle for you (and you won't need to book a separate test with DVSA). A fee of £32 will be charged for the test. If not, your filter supplier may be able to recommend a mobile AE who can carry out the test for you at your premises.
Once the test is successfully completed, the AE will submit documentation to DVSA, which will conduct a quality check on the documentation received.
If everything is in order, DVSA will issue either a LEC or RPC to the vehicle owner by post and will notify us that the certificate has been issued.
It may take up to 10 days for our database to be updated, so in the meantime, you'll need to pay the daily charge if you're driving within the LEZ.
RPCs and LECs are normally valid for 12 months, after which you'll need to get your vehicle re-tested, or pay the daily charge if you're driving within the LEZ.
If you have a lorry, bus or coach, your first RPC or LEC will be valid until your next annual vehicle inspection at DVSA to allow you to schedule the test at the same time.
If you have a larger van or minibus, you will need to get your vehicle re-tested at a DVSA test centre or at any one of the participating non-DVSA LEC testing sites.
Please contact the site directly. This test is separate to your normal annual MOT. Please note that most AEs can only test filters the year they are fitted.
When presenting your vehicle at a DVSA test station or to an AE you must produce the previous original LEC issued to the vehicle.
Please check the current fees for a LEC test by DVSA and for certificates issued following an examination by an AE. Any additional fees incurred for tests carried out at an approved AE site should be discussed with the approved AE directly.
It is very important to: