EXPERT IN AUTO PARTS
16 January 2026 (updated) Table of Contents
A clean air filter is the heart of a healthy engine. The best air filters offer maximum filtration performance (99% and above), protect sensitive engine components, such as the mass air flow sensor, from dirt and dust, and increase engine performance by optimising the air supply. Our experts at AUTODOC have selected 5 top products based on customer ratings and technical data – from inexpensive paper filters to washable sports air filters made of cotton. In our range of car air filters, you will find over 50,000 filter variants for all vehicle models.
|
1
Motor protection
MANN-FILTER C 35 154
£10.99
|
|
2
Value for money
BOSCH 1 987 429 404
£8.29
|
|
3
Longevity
K and N Filters 33-3005
£63.99
|
|
4
Filtration efficiency
RIDEX 8A0004
£6.99
|
|
5
Tuning
PIPERCROSS PP1895
£31.99
|
*The ratings are based on customer experiences at AUTODOC
Advantages
Disadvantages
The MANN-FILTER C 35 154 is a multi-layer paper filter that filters up to 99% of contaminant particles out of the air. The filter medium is designed to maintain the perfect balance between filtration efficiency and air permeability. The rectangular shape with a length of 345 mm fits into many common vehicle models. As an original spare part, this filter fulfils the vehicle manufacturer's specifications and guarantees a long service life for the engine. MANN-FILTER has been supplying car manufacturers for decades and has established itself as a quality brand.
Technical data
| Specification | Value |
|---|---|
| Filter design | Filter insert |
| Length | 345 mm |
| Width | 136 mm |
| Height | 70 mm |
| Article number | C 35 154 |
Reasons to buy
Advantages
Disadvantages
For the 1 987 429 404 model, BOSCH relies on tried and tested paper filter technology with a multi-layer structure. The filtration element effectively removes dust, pollen, soot, and other particles from the intake air. With dimensions of 344.5 x 135.5 x 70.3 mm, it fits into numerous vehicles of different makes. The rectangular shape of the insert enables a quick replacement without special tools – ideal for non-professionals. As one of the world’s largest automotive suppliers, BOSCH produces millions of filters annually and also supplies OEMs directly from the factory.
Technical data
| Specification | Value |
|---|---|
| Filter design | Filter insert |
| Length | 344.5 mm |
| Width | 135.5 mm |
| Height | 70.3 mm |
| Quantity | 1 |
| Article number | 1987429404 |
Reasons to buy
Advantages
Disadvantages
K&N has a real classic in its portfolio with this filter. The multi-layered cotton is treated with a special oil that traps even the smallest particles but still allows more air to pass through than normal paper. The square shape with a base area of 294 x 178 mm and a height of just 32 mm makes it compact. After around 80,000 km or when visibly dirty, the filter is simply washed with the K&N cleaning set and re-oiled, then it is ready for use again. Many motorsport teams rely on K&N sports air filters because they improve the air supply to the cylinders and thus optimise combustion.
Technical data
| Specification | Value |
|---|---|
| Filter design | Long-term filter |
| Shape | square |
| Length | 294 mm |
| Width | 178 mm |
| Height | 32 mm |
| Article number | 33-3005 |
| Manufacturer | K&N Filters |
| Price | €64.99 |
Reasons to buy
Advantages
Disadvantages
RIDEX is positioning itself as a high-quality alternative to expensive original parts, thereby striking a chord with price-conscious motorists. The 8A0004 uses a multi-layer paper medium in a rectangular shape with standard dimensions: 344.5 x 135.5 x 70 mm. As an intake air filter, it filters the air that flows from the air filter box to the engine. Its high filtration efficiency of over 99% means that virtually all harmful particles are captured before they can cause damage to pistons, cylinders, or valves. The replacement takes just a few minutes and requires no special tools.
Technical data
| Specification | Value |
|---|---|
| Filter design | Intake filter |
| Shape | rectangular |
| Length | 344.5 mm |
| Width | 135.5 mm |
| Height | 70 mm |
| Article number | 8A0004 |
Reasons to buy
Advantages
Disadvantages
PIPERCROSS uses a special foam technology that was developed for motorsport. The PP1895 filters have a combination of synthetic materials that offer both high filtration and good air flow. With dimensions of 292 x 177 mm, it is somewhat more compact than standard rectangular filters. The brand from Great Britain has made a name for itself by supplying rally and racing teams. Many tuners rely on PIPERCROSS because the filters allow noticeably more air to reach the engine cylinders and thus increase performance. The filter can make a difference in sports cars, especially Audi, VW, and other European brands.
Technical data
| Specification | Value |
|---|---|
| Length | 292 mm |
| Width | 177 mm |
| Article number | PP1895 |
Reasons to buy
There are different filter types depending on the intended use, budget, and filter performance requirements. The right choice of air filter depends on whether you prioritise maximum performance, long service life, or low costs.
| Filter type | Advantages | Disadvantages |
|---|---|---|
| Paper filter | Inexpensive to purchase, high filter performance, suitable for most vehicles, fulfils all manufacturer specifications | Air permeability decreases when contaminated, not washable, must be replaced regularly, higher follow-up costs |
| Cotton filter | Washable and reusable, better air permeability, durable, often includes warranty, environmentally friendly | Higher purchase price, requires special oil for cleaning, regular maintenance necessary |
| Foam filter | Very robust when dirty, ideal for dusty environments, good for off-road vehicles, versatile | Less common in road vehicles, may require more maintenance |
| Metal mesh filter | Extremely durable, designed for demanding conditions, often used in racing, practically unlimited service life | Very expensive, not suitable for all vehicles, special cleaning required |
| Sports air filter | Maximum air permeability, significantly increases engine performance, often washable, sporty sound | More expensive than standard filters, may affect warranty, not suitable for every type of driver |
You can find more details on the advantages and disadvantages of sports air filters in our detailed guide. It is also important to know the signs you should look for in air filters in order to recognise defects at an early stage and avoid expensive engine damage.
Tip from AUTODOC mechanics: Change the air filter at least once every 30,000 km or once a year. A clogged filter increases fuel consumption by up to 10% and noticeably robs the engine of power. In dusty driving conditions or after frequent short journeys, you should check the filter condition more often.
Sold by AUTODOC Sold by AUTODOC Sold by AUTODOC Sold by AUTODOC Sold by AUTODOC
-15%
K&N Filters Air filter
Length: 283 mm, Square, Long-life Filter
Article number: 33-2221
compared to
RRP
£51.90
£43.99price incl. 20% VAT, excl. delivery costs
-44%
MANN-FILTER Air filter
Ø 133 mm, Filter Insert
Article number: C 16 134/2
compared to
RRP
£22.55
£12.49price incl. 20% VAT, excl. delivery costs
DPA Air Filter Housing Cover
Article number: 11290662502
£54.99price incl. 20% VAT, excl. delivery costs
-10%
Article number: 33-2940
compared to
RRP
£138.42
£124.49price incl. 20% VAT, excl. delivery costs
-17%
K&N Filters Air filter
Length: 356 mm, Square, Long-life Filter
Article number: 33-3028
compared to
RRP
£86.52
£70.99price incl. 20% VAT, excl. delivery costs
Choosing the right brand guarantees quality, a perfect fit, and a long service life. These manufacturers have proven themselves over the years and supply both the automotive industry and the aftermarket.
The selection of the right air filter depends heavily on the vehicle model. Here, you will find specially tailored filters for the most popular car brands in Germany.
Expert tips from AUTODOC: Always invest in high-quality air filters for turbo engines. An inferior filter can allow fine dust to pass through and damage the turbocharger. The repair costs of a defective turbocharger are far higher than the savings you get by buying a cheap filter. In 15 years, our mechanics have seen countless turbos that have worn out prematurely due to poor filtration.
The best choice of air filter depends on your specific requirements. For maximum engine protection at a good price, our AUTODOC experts recommend the MANN-FILTER C 35 154 or BOSCH 1 987 429 404 – both offer original equipment quality at fair prices. If you want to save money in the long term and value performance, go for the washable K&N filter 33-3005, even if it is more expensive to buy. The RIDEX 8A0004 is the perfect option for price-conscious car owners who still want 99% filtration efficiency. Tuning fans will find the PIPERCROSS PP1895 a solid sports air filter at a reasonable price.
All five tested filters offer reliable protection against dust, dirt, and particles. Regular filter changes are one of the most important car maintenance tasks, so don't neglect them. The few euros spent on a new filter are nothing compared to the cost of an engine repair due to inadequate filtration. At AUTODOC, Europe's largest e-commerce platform for car parts, you will find over 6.7 million spare parts from 2,500 brands. Order your air filter now and protect your engine from premature wear.
Sold by AUTODOC Sold by AUTODOC Sold by AUTODOC Sold by AUTODOC Sold by AUTODOC
-22%
FAST Air Filter Housing Cover
Article number: FT37701
compared to
RRP
£91.15
£70.49price incl. 20% VAT, excl. delivery costs
Article number: PP1683
£31.99price incl. 20% VAT, excl. delivery costs
BOSCH Air filter
Length: 505 mm, Filter Insert
Article number: F 026 400 365
£35.99price incl. 20% VAT, excl. delivery costs
-11%
FEBI BILSTEIN Air filter
Length: 260 mm, Filter Insert
Article number: 49658
compared to
RRP
£20.99
£18.49price incl. 20% VAT, excl. delivery costs
-50%
MANN-FILTER Air filter
Length: 367 mm, Filter Insert
Article number: C 37 009
compared to
RRP
£76.31
£37.49price incl. 20% VAT, excl. delivery costs
Most manufacturers recommend a filter change every 30,000 to 60,000 kilometres or every 1–2 years. You should check the component more often in dusty conditions or when taking frequent short journeys. A clogged filter is characterised by increased fuel consumption and reduced performance.
Yes, changing the filter is one of the easiest car maintenance tasks. On most vehicles, you simply open the air filter box, remove the old filter, and insert the new one. This usually only takes 5 to 10 minutes and you don't need any special tools. Our step-by-step guide to changing the air filter shows you exactly how this works.
A dirty or damaged air filter allows dust and dirt to enter the engine. This leads to increased wear on pistons, cylinders, and valves. In addition, fuel consumption increases because the engine can no longer burn it optimally. In the worst case, a filter with holes in it can spoil the mass air flow sensor.
For frequent drivers and tuning fans, yes. A K&N filter may cost more, but you may save money in the long run because you can wash it up to 50 times instead of having to constantly buy new paper filters. It also delivers measurably more power. A normal paper filter is sufficient for infrequent drivers with a standard engine. This detailed guide on how to clean the car air filter properly will help you maintain washable filters.
The engine air filter cleans the air flowing into the engine and thus protects the engine components. The cabin air filter (also known as the pollen filter) cleans the air for the air conditioning system and filters out pollen, dust, and odours for the passengers. Both need to be changed regularly, but fulfil completely different tasks.
A useful video on this topic:
MAHLE Air filter
Length: 266,3 mm, Filter Insert
Sold by AUTODOC
MAHLE Air filter
Length: 344,5 mm, Filter Insert
Sold by AUTODOC
K&N Filters Air filter
Length: 210 mm, round, Long-life Filter
Sold by AUTODOC
MANN-FILTER Air filter
Ø 153 mm, Filter Insert
Sold by AUTODOC
HENGST FILTER Air filter
Length: 301, 306 mm, Filter Insert
Sold by AUTODOC
MANN-FILTER Air filter
Length: 241, 293 mm, Filter Insert
Sold by AUTODOC
VALEO Air filter
Length: 200 mm, Filter Insert
Sold by AUTODOC
K&N Filters Air filter
Length: 152 mm, round, Long-life Filter
Sold by AUTODOC
BOSCH Air filter
Length: 291 mm, Filter Insert
Sold by AUTODOC
MAHLE Air filter
Length: 377,4 mm, Filter Insert
Sold by AUTODOC