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The exhaust system ensures good air


The exhaust is an often underestimated part on the vehicle. The main tasks of the exhaust system are to dissipate the exhaust gases, dampen the noise of the engine and filter environmentally harmful residues. If the exhaust system has a defect, it can already have a big impact. Increased fuel consumption, pollution and noise pollution are the consequences when damage occurs. The exhaust system is constantly subjected to a high load in order to protect us and our environment. Every combustion in the engine produces loud banging noises, and the exhaust system must contain these noises. Added to this is the immensely high temperature of the exhaust gases. Vibrations from the outside of the vehicle also have an effect on the exhaust system, as do liquids or road salt from the road. In the lower section of the page, we go into more detail on the following topics:

Structure of an exhaust system
Detect defects in the exhaust system

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NOx-Sensor Lambdasonde OPEL Zafira Tourer C 1.6 CDTI 855608 / 55487677

vom OPEL Erstausrüster

Item No.: A16214W585
Manufacturer: OPEL
part number: 55501897
Mengeneinheit: Stück
Baugruppe: Abgasanlage
Verwendung: NOx-Wert (Harnstoffeinspritzung)
instead of 495,06 EUR 267,95 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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IMASAF Endschalldämpfer SMART ForTwo Coupe + Cabrio (451) 1.0 61 / 71 PS ab 2007

für Fahrzeuge mit EURO 5b-Norm | mit E-Prüfzeichen

Item No.: A13813W100
Manufacturer: IMASAF
part number: 32.56.07
Mengeneinheit: Stück
Gewicht_kg: 8,36
Einbauseite: hinten
Laenge_mm: 980
Baugruppe: Abgasanlage
Verwendung: Endschalldämpfer
64380027:
185,95 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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KATALYSATOR AUDI A3 8L SEAT Leon SKODA Octavia VW Bora Golf 4 1.6 100-102 PS

inkl. MONTAGEMATERIAL | VAG-Nr: 1J0253058DX

Item No.: UNI813W025
Manufacturer: BM CATALYSTS
part number: BM90529H
???item.ean.code???: 5052746039870
64374267: mit Anbaumaterial
Pruefzeichen: E9-103R
Mengeneinheit: Satz
Baugruppe: Abgasanlage
110,95 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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IMASAF Rohrschelle Bandschelle Ø 66 mm für MERCEDES W203 W204 W205 W211 W212

MERCEDES BENZ OE-Nr. 210 490 11 41 | mit E-Prüfzeichen

Item No.: A12813W333
Manufacturer: IMASAF
part number: 02.70.66
Mengeneinheit: Stück
Durchmesser_1_mm: 66
Rohrverbinder: Bandschelle
Baugruppe: Abgasanlage
Durchmesser_mm: 66
8,95 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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ELRING Abgaskrümmerdichtung für BMW 1er 3er 5er 7er M47 N47 M57 11627798177

Item No.: A02313W926
Manufacturer: ELRING
part number: 171.480
???item.ean.code???: 4041248453575
Verwendung: Abgaskrümmer
Mengeneinheit: Stück
Baugruppe: Zylinderkopf
10,04 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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KATALYSATOR für SEAT AROSA (6H) VW LUPO POLO (6N2) 1.0 ALD + 1.4 AKK AUD AKP

inkl. MONTAGEMATERIAL | VAG-Nr: 6X0253058DX

Item No.: UNI813W026
Manufacturer: BM CATALYSTS
part number: BM90821H
???item.ean.code???: 5052746044126
64374267: mit Anbaumaterial
Pruefzeichen: E9-103R
Mengeneinheit: Satz
Baugruppe: Abgasanlage
103,95 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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Hosenrohr Flexrohr + Montagesatz HYUNDAI i30 FD KIA Cee'D ED 1.4 1.6 mitte

bis EURO 4-Norm | HYUNDAI bis 02.2010 | KIA bis 07.2009

Item No.: PKT862W310
Manufacturer: BM CATALYSTS
part number: BM50308, FK50308C
???item.ean.code???: 5052746105636
Delivery:

  • 1x Exhaust Pipe Piece - BM CATALYSTS BM50308
  • 1x Mounting Kit, exhaust pipe Piece - BM CATALYSTS FK50308C
44,95 EUR

incl. VAT, excl. shipping costs

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WAHLER AGR Ventil 710327D für BMW 1er 3er 5er X1 X3 X5 6er 7er 11717810871

für alle neueren 2l u. 3l Dieselmotoren (1995/2993ccm)

Item No.: A02213W337
Manufacturer: WAHLER
part number: 710327D
???item.ean.code???: 4029783011238
Mengeneinheit: Stück
64374267: with seal
Verwendung: Abgasrückführung
Baugruppe: Abgasrückführung
101,95 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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BOSCH 0258003477 Lambdasonde VOR KAT für BMW E46 320-330i E39 E60 E61 E38 E65

auch für X3 E83 X5 E53 Z3 Z4 | BMW OE Nr. 11781742050

Item No.: UNI564W007
Manufacturer: BOSCH
part number: 0 258 003 477
???item.ean.code???: 3165142800189
Mengeneinheit: Stück
Verwendung: Lambdawert
64375388: 160000
Leiteranzahl: 4
Baugruppe: Gemischaufbereitung
Laenge_Ueber_Alles_mm: 320
48,95 EUR

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IMASAF 09.44.14 Dichtung Abgasrohr SMART Fortwo 451 1.0 ALFA ROMEO 164 3.0 V6 / i.e.

Einschränkung beachten! | mit E-Prüfzeichen

Item No.: A13313W900
Manufacturer: IMASAF
part number: 09.44.14
???item.ean.code???: 8033434011634
Mengeneinheit: Stück
Lochanzahl_2: 2
Durchmesser_2_mm: 9
Durchmesser_1_mm: 49
Baugruppe: Abgasanlage
Lochanzahl_1: 1
Verwendung: Abgasrohr
5,95 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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Rohrverbinder Doppelschelle Auspuff Abgasanlage Ø 65 mm x Länge 90 mm

Item No.: UNI813W010
Manufacturer: FA1
part number: 114-966
Mengeneinheit: Stück
Baugruppe: Abgasanlage
Laenge_mm: 90
Rohrverbinder: Doppelschelle
Durchmesser_mm: 65
7,94 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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TRUCKTEC Dichtung Turbolader Ölleitung SMART Cabrio City-Coupe 450 1600970080

Item No.: UNI313W036
Manufacturer: TRUCKTEC AUTOMOTIVE
part number: 02.14.002
Fuer_Oe_Nummer: 160 097 0080
Mengeneinheit: Stück
Aufladungsart: Turbo
Verwendung: Lader
Baugruppe: Luftversorgung
5,55 EUR

incl. VAT, excl. shipping costs

available / 1-2 working days
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The structure of the exhaust system

The exhaust system starts with the exhaust manifold and the associated manifold gasket. An exhaust manifold usually lasts the life of a car. From the manifold, the exhaust gases are directed through the individual openings into the so-called Y-pipe. Installed on or in the Y-pipe is the flex pipe, which consists of a wire mesh. It can move easily and thus absorb and cushion the vibrations of the engine block. At the same time, it is also susceptible to damage and corrosion. In most vehicles, the Y-pipe also houses the lambda sensor. This reports the composition of the exhaust gases and so the mixing ratio of air and fuel can be optimized.

In gasoline engines, the catalytic converter now follows and serves as a filter, which filters out large parts of the toxins. In diesel engines, this is usually followed by the soot particle filter. In both diesel and gasoline engines, the AGR valve is also installed between the exhaust system and the intake tract. In the case of diesel, exhaust gas recirculation serves to reduce nitrogen oxide by lowering the combustion temperature. Gasoline engines benefit from EGR because the admixture of exhaust gases reduces fuel consumption.

A brief overview of the exhaust gas purification of the two engines:

Gasoline engines:
The formation of carbon dioxide cannot be prevented in gasoline engines. The catalytic converter, however, reduces the pollutants by converting carbon monoxide into carbon dioxide and nitrogen oxides into nitrogen. The catalytic converter contains a body made of ceramic, which is constructed in the form of a honeycomb. The precious metals platinum, rhodium and palladium are built into the ceramic, which additionally bind the harmful substances.

Diesel engines:
Soot formation is the biggest problem in diesel engines. The soot particle filter or diesel particulate filter (DPF) filters the particles out of the exhaust gas. A sensor determines the regeneration phase. Then the DPF heats up and the fine dust particles are burned off.

The catalytic converter or diesel particulate filter is followed by the pre- and mid-silencer, where mainly the vibrations are reduced and the exhaust gas flow is reduced. The final component in the exhaust system is the final muffler. Here, vibrations are further reduced by damping material and the exhaust gases are divided into several chambers, reducing each other's sound waves. Condensation collects in the exhaust system, which is spewed out at the end together with the exhaust gases.

How can defects in the exhaust system be detected and what are they?

The high loads on the exhaust system can lead to defects. These are either broken components such as the lambda sensor, soot particle filter or catalytic converter, or leaks in the exhaust pipe and exhaust. The latter is noticeable by louder noises at the exhaust or also by wet spots under the car. A rattling at the exhaust system is often an indication of a loose bracket or a broken catalytic converter. A visual inspection will often show where the damage is. Small open or leaking areas can be sealed with a exhaust repair paste or, alternatively, welded. Brackets are also quickly changed on an exhaust system.

However, if the defect is not on the outside of the visible parts of the exhaust system, the repairs are somewhat more complex. Increased fuel consumption or loss of power, for example, indicate broken parts such as the lambda sensor and DPF. Also dark exhaust gases are an indication of a defect located in the exhaust system. In the cases, the repair of the exhaust system is possible only with appropriate expertise.

In any case, rely on high-quality spare parts. These do not necessarily have to be original parts from the vehicle manufacturer. These often only obtain parts from reputable suppliers. It is therefore worth buying branded goods in OEM quality. It is significantly cheaper than the original parts but still of the same quality. Thus, the newly installed spare parts from the exhaust system last a long time and you still save money. To find the right parts for the exhaust system, it is best to select your vehicle with us. Then you will be shown only suitable parts. If you are unsure which spare part you need for your exhaust system, simply contact our customer service with the 17-digit chassis number.