Exhaust
11-1 Exhaust system and silencer
Reasons for rejection
Mandatory equipment
1. A vehicle does not comply with the requirements relating to mandatory equipment set out in:
- VIRM: In-service certification, section 11-1, general vehicles
- VIRM: In-service certification, section 11-1, heavy vehicles
- VIRM: In-service certification, section 11-1, light PSVs
- VIRM: In-service certification, section 11-1, heavy PSVs.
Compliance with approved standards
2. A class LC, LD, LE, MA, MB, MC, MD1, MD2, MD3, MD4, ME, NA, NB or NC vehicle, other than one listed in Table 11-1-1, manufactured on or after 1 January 1985 and certified for entry on or after 1 June 2008:
a) did not comply, or cannot be demonstrated to have complied, with at least one of the approved standards listed in Table 11-1-2 at the time the vehicle was manufactured, or
b) exceeded the noise limits in Table 11-1-2 when it was tested in accordance with the standards in Table 11-1-2 at the time the vehicle was manufactured, or
c) does not have evidence that the vehicle has passed an LVVTA objective noise test, for instance:
i. the owner cannot produce a valid ‘Objective exhaust noise emission test certificate’ (Figure 11-1-1), or
ii. the exhaust system tailpipe is not fitted with a valid LVVTA noise test label (Figure 11-1-2).
Condition and performance
3. A vehicle does not comply with the requirements relating to condition and performance set out in:
Table 11-1-1. Vehicles deemed to comply with approved noise standards and drive-by noise limits
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Evidence of compliance with an approved noise standard and noise limit is not required for the following vehicles: |
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Table 11-1-2. List of approved noise standards and drive-by noise limits
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A vehicle manufactured on or after 1985 for which evidence of compliance with an approved standard and noise level is required must comply with the following: |
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Approved noise standard |
Vehicle class |
Maximum noise level (dBA) |
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ISO 362 BS 3425 SAE J1470 ADR 28/01 TRIAS 20 |
LC, LD, LE (engine capacity of 125 cc or less) LC, LD, LE (engine capacity more than 125 cc) MA, MB, MC, MD1, MD2, NA MD3, MD4, ME, NB, NC (power output 150 kW or less) MD3, MD4, ME, NB, NC (power output more than 150 kW) |
82 86 81 86 88 |
Figure 11-1-1. Objective exhaust noise emission test certificate
Figure 11-1-2. Objective noise test label
Summary of legislation
Applicable legislation
Mandatory equipment
1. A vehicle must comply with the requirements relating to mandatory equipment set out in:
- VIRM: In-service certification, section 11-1, general vehicles
- VIRM: In-service certification, section 11-1, heavy vehicles
- VIRM: In-service certification, section 11-1, light PSVs
- VIRM: In-service certification, section 11-1, heavy PSVs.
Compliance with approved standards
2. A class LC, LD, LE, MA, MB, MC, MD1, MD2, MD3, MD4, ME, NA, NB or NC vehicle manufactured on or after 1 January 1985 and certified for entry on or after 1 June 2008 must comply with:
a) an approved standard and not exceed the relevant noise limit, as specified in Table 11-1-2, or
b) the LVVTA objective noise test.
Condition and performance
3. The exhaust system and silencer must comply with the requirements relating to condition and performance set out in the relevant section of the VIRM: In-service certification, section 11-1.
Modification
4. A vehicle must comply with the requirements relating to modifications set out in: