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Legacy Audis of 1987-2000 Are Protected by the K&N 33-2029 Engine Air Filter

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K&N 33-2029 replacement washable air fitler for Audi

The K&N 33-2029 engine air filter will replace the stock air filter and is constructed of a special cotton gauze that presents a greater surface area to trap more dirt and other particles.

Audi owners are part of a storied automotive design and engineering fraternity, and if you own a 20th century example built between 1987 and 2000, you appreciate it as a legacy car, a vehicle at the top of the sporty, sophisticated driving scene of its time. A number of models from that 13-year period have been voted "best of all time" by web entities such as Ranker and Complex.com, which use input from fans and experts, requiring voters to have the car's practicality, reliability, and performance in mind, and their community-based survey results seem quite relatable. Especially appreciated are the A6, the 1989, 1990 and 1991 Audi 80s, the 1986, 1989 and 1990 Audi 100 Sedans, the 1991 Audi 90, and 1996-98 Cabriolets.

Of note are Audi's innovations from that time, such as aerodynamic flush windows in the C3 100 of 1991, and a fully zinc-dipped, galvanized body for the new type 89 in 1987 (also called the 80 and 90, in North America), which are design and manufacturing practices still in use today.

Development of both lightweight, high-performance diesel- and gasoline-powered engines at this time revolved around Audi's in-line four- and five-cylinder motors from 1.9 to 2.3 liters in size, plus new 2.6- and 2.8-liter V6s and a new 1.9-liter TDI (turbocharged direct injection) diesel. It was quite a range that was mostly available only in Europe, but North America did get the V6 and TDI.

The Coupe and Cabriolet came along in 1988, based on the Audi 80 platform, and the 1990 Coupe made it to North America as a Quattro GT car with the 20-valve, 1.3-liter 5-cylinder engine. The Cabriolet, based on the Coupe, and Audi's first convertible since 1959, was powered by the 2.8- and 2.6-liter V6s.

Although emissions and old-car regulations keep many vehicles over a certain age off the roads in Europe and the UK, yours is a survivor, and that is because you've maintained it well and driven it carefully. Among those maintenance details is the engine air filter service which has been made simpler and easier for some time by utilizing the K&N 33-2029 washable, reusable engine air filter.

Box for K&N 33-2029 replacement air filter

An engine air filter service is something you can easily do yourself, or you can order up the K&N 33-2029 filter and 99-5000 cleaning kit for your mechanic, and be assured you are giving your early-generation car the best protection on the planet.

The range of engines for the specific 1987-2000 Audis listed below is varied, but those included all share the same basic air box shape and dimensions that can hold the same open-top, rectangular air filter that can be replaced by the K&N 33-2029. Why keep buying disposable air filters when you're in preservation mode with your elder Audi?

K&N engine air filters are designed and engineered to replace the stock air filter and are constructed of an oiled, cotton gauze filter medium that presents a greater filter surface area to trap particles and bring more air to the engine. The filters are designed to provide more horsepower and torque for crisper throttle response, a plus for any iteration of your favorite marque.

The 33-2029 is recommended to be cleaned at 50,000 mile intervals, depending on driving conditions. It also can be cleaned more often if you wish. The process is very easy and requires only simple hand tools. A set of printed instructions accompany each K&N filter, and depending on your model, there are also videos available online to walk you through the procedure.

The best way to clean this filter is with the K&N 99-5000 filter care service kit. Spray the filter with Power Kleen spray, rinse in clear running water, let it thoroughly air dry, then re-oil it with a few sprays of the air cleaner oil before refitting. Or you can simply specify the K&N 33-2029 filter and 99-5000 cleaning kit to your mechanic for the next scheduled service.

You appreciate what your vintage Audi can do for you daily and what it has done throughout the decades on road and track. The engineering successes and innovations built into your passenger car makes it a superior road-going vehicle that you can love forever. To ensure that your Audi stays reliable, invest in the K&N 33-2029 engine air filter, which is backed by K&N's 10-year, Million Mile warranty.

When you're ready to buy a K&N replacement air filter, first use K&N's online search by vehicle tool, then visit an authorized K&N dealer, who can be found worldwide using the K&N dealer search.

The K&N 33-2029 replaces the following part numbers:

AC Delco A1226C
BMC 11201
Fram CA6545
Mann-Hummel C311521
Napa 6240
Purolator A24409
Ryco A1528
Volkswagen 859129620
Wesfil WCA9267
WIX 46240

The following Audi models can use the K&N 33-2029 Replacement Air Filter:

2000 AUDI CABRIOLET 2.8L V6 F/I
2000 AUDI CABRIOLET 1.9L L4 DIESEL
2000 AUDI CABRIOLET 1.8L L4 F/I
1999 AUDI CABRIOLET 2.8L V6 F/I
1999 AUDI CABRIOLET 1.9L L4 DIESEL
1999 AUDI CABRIOLET 1.8L L4 F/I
1998 AUDI CABRIOLET 2.8L V6 F/I
1998 AUDI CABRIOLET 2.0L L5 F/I
1998 AUDI CABRIOLET 1.9L L4 DIESEL
1998 AUDI CABRIOLET 1.8L L4 F/I
1998 AUDI A6 QUATTRO 2.8L V6 F/I - Wagon
1998 AUDI A6 2.8L V6 F/I - AFC Eng.
1997 AUDI CABRIOLET 2.8L V6 F/I
1997 AUDI CABRIOLET 2.0L L5 F/I
1997 AUDI CABRIOLET 1.9L L4 DIESEL
1997 AUDI CABRIOLET 1.8L L4 F/I
1997 AUDI A6 QUATTRO 2.8L V6 F/I
1997 AUDI A6 2.8L V6 F/I
1997 AUDI A6 2.6L V6 F/I
1997 AUDI A6 2.5L V6 DIESEL - to 6/97
1997 AUDI A6 1.9L L4 DIESEL - to 2/97
1997 AUDI A6 1.8L L4 F/I - to 4/97
1996 AUDI COUPE 2.8L V6 F/I
1996 AUDI COUPE 2.6L V6 F/I
1996 AUDI CABRIOLET 2.8L V6 F/I
1996 AUDI CABRIOLET 2.0L L5 F/I
1996 AUDI CABRIOLET 1.9L L4 DIESEL
1996 AUDI A6 QUATTRO 2.8L V6 F/I
1996 AUDI A6 2.8L V6 F/I
1996 AUDI A6 2.6L V6 F/I
1996 AUDI A6 2.5L V6 DIESEL
1996 AUDI A6 2.0L L4 F/I
1996 AUDI A6 1.9L L4 DIESEL
1996 AUDI A6 1.8L L4 F/I
1995 AUDI S6 2.2L L5 F/I
1995 AUDI S6 2.0L L4 F/I - Turbo
1995 AUDI COUPE 2.8L V6 F/I
1995 AUDI COUPE 2.6L V6 F/I
1995 AUDI CABRIOLET 2.8L V6 F/I
1995 AUDI CABRIOLET 2.0L L5 F/I
1995 AUDI CABRIOLET 1.9L L4 DIESEL
1995 AUDI A6 QUATTRO 2.8L V6 F/I
1995 AUDI A6 2.8L V6 F/I
1995 AUDI A6 2.6L V6 F/I - Al
1995 AUDI A6 2.5L V6 DIESEL
1995 AUDI A6 2.0L L4 F/I
1995 AUDI A6 1.9L L4 DIESEL
1995 AUDI A6 1.8L L4 F/I
1995 AUDI 90 QUATTRO 2.8L V6 F/I
1995 AUDI 90 2.8L V6 F/I
1995 AUDI 80 2.8L V6 F/I
1995 AUDI 80 2.6L V6 F/I
1994 AUDI S4 2.3L L5 F/I - Turbo, 20v
1994 AUDI S4 2.2L L5 F/I
1994 AUDI COUPE 2.8L V6 F/I
1994 AUDI COUPE 2.6L V6 F/I
1994 AUDI CABRIOLET 2.8L V6 F/I
1994 AUDI CABRIOLET 2.0L L5 F/I
1994 AUDI A6 2.8L V6 F/I
1994 AUDI A6 2.6L V6 F/I
1994 AUDI A6 2.5L V6 DIESEL
1994 AUDI A6 2.0L L4 F/I
1994 AUDI A6 1.9L L4 DIESEL
1994 AUDI 90 QUATTRO 2.8L V6 F/I
1994 AUDI 90 2.8L V6 F/I
1994 AUDI 80 2.8L V6 F/I
1994 AUDI 80 2.6L V6 F/I
1994 AUDI 80 2.0L L4 F/I - Exc. 16v
1994 AUDI 100/200 1.9L L4 DIESEL - TDi, 90BHP
1994 AUDI 100 QUATTRO 2.8L V6 F/I
1994 AUDI 100 2.8L V6 F/I
1994 AUDI 100 2.6L V6 F/I
1994 AUDI 100 2.4L L5 DIESEL
1994 AUDI 100 2.5L L5 DIESEL
1994 AUDI 100 2.3L L5 F/I - Non-US
1994 AUDI 100 2.2L L5 F/I
1994 AUDI 100 2.0L L4 F/I
1993 AUDI S4 2.3L L5 F/I - 20v, Turbo
1993 AUDI S4 2.2L L5 F/I
1993 AUDI COUPE 2.8L V6 F/I
1993 AUDI COUPE 2.6L V6 F/I
1993 AUDI CABRIOLET 2.8L V6 F/I
1993 AUDI CABRIOLET 2.0L L5 F/I
1993 AUDI 90 QUATTRO 2.8L V6 F/I
1993 AUDI 90 2.8L V6 F/I
1993 AUDI 80 2.8L V6 F/I
1993 AUDI 80 2.6L V6 F/I
1993 AUDI 80 2.0L L4 F/I - Exc. 16v
1993 AUDI 100/200 1.9L L4 DIESEL - TDi, 90BHP
1993 AUDI 100 QUATTRO 2.8L V6 F/I
1993 AUDI 100 2.8L V6 F/I
1993 AUDI 100 2.6L V6 F/I
1993 AUDI 100 2.5L L5 DIESEL
1993 AUDI 100 2.4L L5 DIESEL
1993 AUDI 100 2.3L L5 F/I
1993 AUDI 100 2.2L L5 F/I
1993 AUDI 100 2.0L L4 F/I
1992 AUDI S4 2.2L L5 F/I
1992 AUDI COUPE 2.8L V6 F/I
1992 AUDI COUPE 2.6L V6 F/I
1992 AUDI CABRIOLET 2.8L V6 F/I
1992 AUDI 80 2.8L V6 F/I
1992 AUDI 80 2.6L V6 F/I
1992 AUDI 80 2.0L L4 F/I
1992 AUDI 100/200 1.9L L4 DIESEL - TDi, 90BHP
1992 AUDI 100 QUATTRO 2.8L V6 F/I
1992 AUDI 100 2.8L V6 F/I
1992 AUDI 100 2.6L V6 F/I
1992 AUDI 100 2.5L L5 DIESEL
1992 AUDI 100 2.4L L5 DIESEL
1992 AUDI 100 2.3L L5 F/I
1992 AUDI 100 2.2L L5 F/I
1992 AUDI 100 2.0L L4 F/I
1991 AUDI COUPE 2.8L V6 F/I
1991 AUDI 80 2.8L V6 F/I
1991 AUDI 80 2.0L L4 F/I - from 9/91
1991 AUDI 80 1.9L L5 DIESEL
1991 AUDI 100/200 1.9L L4 DIESEL - TDi, 90BHP
1991 AUDI 100 2.8L V6 F/I
1991 AUDI 100 2.6L V6 F/I
1991 AUDI 100 2.5L L5 DIESEL
1991 AUDI 100 2.4L L5 DIESEL - from 6/91
1991 AUDI 100 2.3L L5 F/I - Non-US
1991 AUDI 100 2.2L L5 F/I
1991 AUDI 100 2.0L L4 F/I
1990 AUDI 80 1.9L L5 DIESEL
1990 AUDI 100 2.2L L5 F/I
1989 AUDI 80 1.9L L5 DIESEL
1989 AUDI 100 2.2L L5 F/I - from 4/89, Exc. 120/200BHP
1988 AUDI 80 1.9L L5 DIESEL
1987 AUDI 80 1.9L L5 DIESEL


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K&N Engineering in Riverside California is the world's leading manufacturer of washable performance air filters and air intake systems. K&N invented the reusable high flow cotton air filter in 1969 and has been perfecting the technology ever since. K&N is a world class filtration company selling air filters, oil filters, and intakes in over 50 countries. K&N sells over 5,000 products designed for cars, trucks, motorcycles, engines, and industrial applications. From their Million Mile Warranty to their Consumer Protection Pledge, K&N stands behind their products and their consumers 100%. The distinctive K&N logo represents performance from one of the original performance companies. For more information, visit knfilters.com.