Audi Replacement Front




AUDI SEAT SKODA VW 1.9 TDi CATALYTIC CONVERTER. AUDI A3 1.9 TDi (AHF, ASV, ASZ engines) 01/1997-05/2003. SEAT LEON 1.9 TDi (AHF, ALH, ARL, ASV, ASZ engines) 09/1999-07/2006. SEAT TOLEDO 1.9 TDi (AHF, ALH, ARL, ASV, ASZ engines) 06/1999-10/2005.

SKODA OCTAVIA 1.9 TDi (AHF, ASV, ASZ engines) 06/1998-01/2006. VW BEETLE 1.9 TDi (ALH, ATD engines) 09/2001-07/2005. VW BORA 1.9 TDi (AHF, AJM, ARL, ASV, ASZ, ATD, AUY engines) 09/1998-06/2005.

VW GOLF 1.9 TDi Mk. 4 (AHF, AJM, ALH, ARL, ASV, ASZ, ATD, AUY engines) 10/1997-06/2005. Type Approved Catalytic Converter (Euro 2). PLEASE ALSO SUPPLY YOUR TELEPHONE NUMBER SO WE CAN GIVE THIS TO THE COURIERS.

Fitment & Listing Information Please be aware that whilst we make every effort to ensure this listing is as accurate as possible, there may be alternative parts that fit your vehicle. There may be other factors that can determine if a part will or will not fit your vehicle. These factors can include, but are not limited to, Engine Number, Engine Code, Chassis Number, Production Date, Registration Date, Transmission Type or Country of Origin. Whilst the compatibility guide may say this fits the same vehicle as the one you have, it doesn't confirm 100% suitability for your vehicle.

We do ask for the customer to check fitment prior to ordering. We also ask for the UK registration number or chassis number of the vehicle if purchasing from outside the UK to be provided on checkout (even if fitment has been checked beforehand). If no vehicle information is provided on checkout, we will dispatch the item you have ordered.

Please see the bullet points below: The quantity of items available is correct at the time of uploading this listing. The prices shown are inclusive of VAT.

Due to the size of some our products the amount charged may be insufficient. Orders placed before 4pm on Friday will be delivered on Monday.

" Goods" Means the articles or things described in the Order. A Acceptance of Terms & Conditions.

Nothing in these Terms & Conditions shall be construed as affecting the statutory rights of the Customer. We reserve the right to correct any errors, inaccuracies or omissions, and to change or update the information or cancel Orders if any information is inaccurate at any time without prior notice (including after you have submitted your Order). F Supply of vehicle identification details. You must supply the vehicle registration number or chassis number when placing your Order. You must request the return within a period of 14 days, beginning with the day on which the item was delivered. The item must me unused, undamaged and packed securely in the original packaging. Please note that you will be responsible for the cost of returning the Goods. We will not accept any responsibility for items lost or damaged during return transit.

In the absence of such emailed notification of claims, within the periods aforementioned, the Goods shall be deemed to have been delivered in accordance with the contract. The aforementioned warranties do not apply to damage to the Goods caused by misuse, faulty workmanship, faulty vehicle, operation beyond the limits of rated capacity, neglect or default in the use or application of the Goods. A DPF is only covered for structural failure. All conditions and warranties whether expressed or implied are hereby excluded save only those which by statute may not be excluded. Whilst endeavouring to be competitive, our price beater policy is subject to our discretion, and we reserve the right to decline an offer to beat a competitor's price.

Diesel Particulate Filter Guide to Installation & Fault Finding. IMPORTANT NOTE: If you are replacing your Diesel Particulate Filter it is highly likely that either a fault occurring elsewhere on the vehicle or the driving style has caused it to fail. A full fault diagnosis must be carried out by a fully trained technician with the appropriate diagnostic equipment to establish if the DPF needs to be replaced. The checks listed in this guide should be carried out prior to replacement to ensure the new DPF operates correctly when fitted.

By not carrying out these checks the new DPF could fail shortly after it is replaced. Unlike a catalytic converter a DPF is not a flow through device, it is a soot trap that collects particulates from exhaust emissions. The exhaust gasses flow into the DPF but cannot exit down the same channel as the exit is blocked.

The gasses escape through the porous cell walls, but the particulate matter is too large to escape so is trapped within the DPF. The DPF disposes of this soot during a process called "regeneration" when the particulates are burnt off. On a properly functioning vehicle regeneration will occur approximately every 500 miles (this is very substantially dependent on the vehicle and driving conditions).

The most common reason for the failure of a DPF is that it has become too "clogged" with soot to be able to regenerate. It is easy in this instance to simply assume the DPF is at fault and replace it, but if no diagnostic work is carried out it is likely the new DPF will fail quickly (within 300 miles). The best source of information is the vehicle owner/driver. The information they provide can be invaluable in identifying the fault.

What type of driving does the car do? If the car does mostly town or city driving it is likely that the DPF has not reached the optimum temperature to regenerate and has become "clogged".

If the car does a lot of motorway driving and the car has 6 gears and the engine revs are sometimes so low that the exhaust temperature does not get high enough for regeneration to occur. Occasional harder driving in low gears should be enough to burn off the soot in these cases. How long has the DPF warning light been illuminated.

Many DPF problems are caused by simply ignoring the warning lights that advise that the DPF needs to be regenerated. Once the DPF is around 45% full the vehicles Electronic Control Unit makes changes to the fuel injection timing to increase the exhaust temperature to burn off the particulates. If the journeys completed at this point are stop/start the conditions required for regeneration may not be met and the warning light will be illuminated indicating that the DPF is starting to become blocked. It should be possible to clear this warning by driving at speeds greater than 50mph for around 20 minutes (the engine must be running at a minimum of 2500 rpm). If the warning light continues to be ignored or conditions for regeneration are not met the level of soot in the DPF will continue to increase, and at around 75% full the DPF will have to be regenerated by a dealer or specialist garage.

You can expect other dashboard lights to be illuminated as well. If the warnings are still ignored and the soot levels increase to around 95% you can expect the vehicle to be put into "limp mode" by the ECU in order to protect the engine from damage due to the increased back pressure caused by the blocked DPF. At this point the DPF cannot be regenerated and will need to be replaced. Has the vehicle been serviced recently or has the oil been changed? If the vehicle has recently been serviced it is worth checking that the correct type of oil has been used.

Most DPF vehicles require a special type of low ash oil, and using the incorrect oil can lead to problems during the regeneration process. If the vehicle uses a fuel additive system to aid regeneration it should be checked that the additive tank has been filled. The additive tank is normally located near the fuel tank. § Diagnostic Checks & Installation. Before fitting the DPF diagnostic checks should be carried out with an appropriate fault code reader to establish any codes held within the ECU. Comprehensive testing of the components listed below should also be carried out as a fault with one of them either alone or in combination could lead to DPF failure. Be aware that an unresolved fault with the vehicle that illuminates the engine management light will usually prevent the regeneration process from initiating and therefore the DPF will become blocked. DPF Pressure Pipes & Sensors - checks should be made to ensure all pipes are free from damage or blockages and the differential pressure sensor is working correctly. It is best practice to replace the differential pressure sensor when fitting a new DPF. Oil Level - if the oil level is high this is a sign that it has been contaminated with fuel from failed regeneration attempts. The extra fuel intended to increase the exhaust temperature can find its way into the engine sump, contaminating the lube oil and sometimes leading to a breakdown as the engine can start to run uncontrollably on its sump oil. An oil change will be necessary. Oil Specification - check that the correct low ash oil has been used. Fuel Additive (where applicable) - check the level of the fuel additive, and fill the additive tank as required. Sensor Checks - check all sensors (exhaust gas temperature & oxygen sensors) to ensure that they are operating correctly. EGR System - check the Exhaust Gas Recirculation valve is working correctly and is not blocked. As a minimum the EGR valve must be removed, checked and cleaned before replacing the DPF. Glow Plug System - check all glow plugs and the glow plug controller/relay are working correctly.

It is very common that when one or more glow plug fail the controller/relay also fails possibly due to a surge in voltage. Alternatively the controller/relay may have failed first allowing the glow plugs to run continuously which causes them to burn out. Either way when you have a glow plug fault you should replace all the glow plugs and the glow plug controller/relay.

A failed glow plug controller/relay very often does not trigger a fault code. On a BMW the regeneration system will not initiate if the glow plug system is not working correctly and the glow/plug controller/relay has failed leading to the DPF becoming blocked. Engine Thermostat - check the engine thermostat or thermostats are working correctly as correct engine temperature is one of the set parameters that must be reached to allow the regeneration process to initiate. If the thermostat is stuck open and therefore the engine is running too cool the regeneration process will not initiate and the DPF will become blocked.

Many BMW's have 2 thermostats (main & EGR) and both are required to be working correctly to allow the correct engine temperature to be reached for regeneration of the DPF. Fuel Vaporiser - some cars (all Euro 5 Fords, Peugeot Boxer, Fiat Ducato, Citroen Jumper, Citroen Relay to name just a few) are fitted with a fuel vaporiser that injects diesel directly into the exhaust to aid the regeneration of the DPF. Should the vaporiser stop working or the injector become clogged with soot the temperature achieved within the DPF during the regeneration process will be insufficient causing the regeneration to fail and ultimately the DPF to become blocked.

The Following Items Must be Checked - engine and turbo wear, air flow meter/air mass sensor, fuel injectors (in case they are leaking or over fuelling) turbo hoses/inter-cooler must be checked for leaks and the main engine ECU should also be checked for any malfunctions. § DPF Installation & Set Up. Once the fault that caused the previous DPF to fail has been rectified the new DPF can be fitted.

The new DPF should be fitted loosely to line it up correctly with the rest of the exhaust system before tightening it up. This includes telling the car that a new DPF has been fitted, resetting the ash counter and calibrating the differential pressure sensor.

Failure to complete the setup procedure correctly will cause the new DPF to become blocked as the vehicle is unaware that a new DPF has been fitted and therefore the regeneration system will not have been reset. A forced regeneration may be part of the reset procedure and if all guidelines have followed a new aftermarket DPF will work in the same way as the O. Specification unit did prior to failure. If the procedures set out in this guide have not been followed the new DPF could become blocked within a very short space of time and may not be able to be regenerated.

Although every effort is made to ensure our catalytic converters will not fail, sometimes a problem with the vehicle will cause them to break down. Road Damage This is external damage caused to the catalytic converter by hitting solid objects in the road, i. Speed ramps, large rock etc.

If the catalytic converter suffers road damage the monolith inside can be cracked due to it being crushed by movement of the steel can. Plugged or Contaminated Plugged or contaminated catalytic converters are caused by using the wrong sort of fuel in your car. Using leaded or lead replacement fuel will plug up the monolith and cause it to stop working. A similar thing will happen if fuel additives are used that are not suitable for use with a catalytic converter. Oil Fouled This is caused by oil getting into the exhaust system and contaminating the catalytic converter. The most likely causes would be a failing turbo charger, worn engine or oil seals. Broken Monolith/Substrate The use of exhaust paste before a catalytic converter or diesel particulate filter can cause the monolith/substrate to be damaged. When the exhaust paste has hardened small pellets may break away and shoot into the catalytic converter or diesel particulate filter. The monolith/substrate will gradually be destroyed by these pellets and break down.

There are many problems that can cause the catalytic converter to overheat or fail. The most common causes are below. Faulty spark plugs, ignition coils or HT leads will cause the engine to misfire sending unburnt fuel into the exhaust system causing the catalytic converter to overheat and fail.

This will also cause a high HC reading on the MOT emissions test. An oxygen sensor collects readings and sends information to the electronic control unit. This information is used to control the air/fuel mix. If the oxygen sensor is faulty the air/fuel mix will not be corrected and excess fuel will enter the catalytic converter causing it to overheat and fail. C Fuel Injection Systems If a fuel injector is leaking internally or dribbling fuel into the engine the excess fuel will enter the exhaust system causing the catalytic converter to overheat and fail. D Map Sensors Map Sensors tell the electronic control unit the load the engine is under and the amount of fuel entering it. If a map sensor fails it allows the engine to run too rich which causes the catalytic converter to overheat and fail. If your vehicle has failed the MOT emissions test you will need to include a scanned copy of the engine emissions test failure report. The most common causes of a blocked DPF are listed below. A newly fitted DPF will block if the fault that caused the original filter to block was not rectified prior to fitting the replacement.

After installation the main Electronic Control Unit must be readapted to the new DPF. If the correct setup process is not completed the regeneration process will not initiate and the DPF will become blocked. A fault with an associated component i. Differential pressure sensor, exhaust gas temperature sensor, exhaust gas recirculation valve will prevent the regeneration process from initiating and the DPF will become blocked.

When the DPF light illuminates you must follow the instructions in the owners hand book, failure to comply could result in a blocked DPF. A DPF that uses an additive to assist in the regeneration process must never be driven without this fluid as this could result in a blocked DPF. On most vehicles the regeneration will not take place when the fuel light is on or if there is less than 10 litres of fuel in the tank.

The use of the incorrect grade and type of engine oil can cause a DPF to become blocked. It is not advisable to run a DPF equipped vehicle on Bio-Diesel fuel as this can block a DPF. The style of driving or type of journeys covered that do not allow the vehicle to meet the correct parameters for active regeneration will cause a DPF to become blocked.