{"nhtsa_id":10201887,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2021-10-05","date":"2021-09-03","document_id":"2050334/7","mfr_campaign":null,"replaces":null,"component":"ENGINE AND ENGINE COOLING","mfr_system":null,"summary":"Ticking noise from engine bay. Customer statement / workshop findings: Ticking noise emanating from rear of Bank 1 cylinder head Technical background: Noise from failed vacuum pump. Measure: A specific vacuum pump failure is known to create a ticking noise. This ticking noise, on initial inspection, is easily misinterpreted as a fault in the valve train or fuel injector, when in reality it is more likely to be produced by a defective vacuum pump. Therefore always ensure that this type of noise is identified precisely using a stethoscope. Specifically use the stethoscope to check the vacuum pump located at the rear of Bank 1 cylinder head, when this is found to be the origin of the noise then change the vacuum pump and retest.","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201887-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2021/MC-10201887-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/10201887","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"BENTLEY","model":"BENTAYGA","year_from":2017,"year_to":2022,"match":"exact","vehicle_ids":["2017_bentley_bentayga","2018_bentley_bentayga","2019_bentley_bentayga","2020_bentley_bentayga","2021_bentley_bentayga","2022_bentley_bentayga"]},{"make":"BENTLEY","model":"CONTINENTAL GT","year_from":2017,"year_to":2022,"match":"base","vehicle_ids":["2017_bentley_continental","2018_bentley_continental","2019_bentley_continental","2020_bentley_continental","2021_bentley_continental","2022_bentley_continental"]},{"make":"BENTLEY","model":"CONTINENTAL GT CABRIO","year_from":2017,"year_to":2022,"match":"base","vehicle_ids":["2017_bentley_continental","2018_bentley_continental","2019_bentley_continental","2020_bentley_continental","2021_bentley_continental","2022_bentley_continental"]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}