Parts for your 2020 Haval H6-Brake booster

2020 Haval H6 brake booster — what it does and how to look after it

Based on technical sources, including the Haval H6 2017–2020 Workshop Manual (Brake System) and the GWM/Haval Electronic Parts Catalogue used by dealers, the 2020 Haval H6 is fitted with a vacuum-assisted brake booster mounted on the firewall ahead of the driver. The booster is supplied vacuum via the intake manifold and, on turbo‑petrol variants, an auxiliary vacuum pump, and includes a one‑way check valve. A brake booster is absolutely relevant on this model and forms a core part of its hydraulic braking system.

The brake booster’s job is to multiply the driver’s pedal effort using engine vacuum, so the H6 pulls up smartly without needing a leg like a front-rower. If the booster’s diaphragm, check valve or vacuum supply isn’t right, pedal effort jumps up and stopping distances can blow out, even though the rest of the braking hardware may be fine. Think of it as the helper between your foot and the master cylinder, keeping pedal feel light and consistent.

For routine servicing, a booster isn’t a scheduled replacement item, but it does appreciate a quick look-over whenever the vehicle’s in for brakes or a general service:

• Inspect the vacuum hose and check valve for cracking, loose clamps or oil contamination.
• Listen for a steady hissing at idle near the pedal area — a classic vacuum leak clue.
• Do a simple driveway test: with the engine off, pump the pedal until it’s firm, hold it, then start the engine. The pedal should drop slightly. If it doesn’t, booster assistance may be missing.

Replacement is only needed if the booster leaks, the internal valve sticks, or the pushrod clearance can’t be set correctly. Typical workshop steps include isolating the battery, moving the master cylinder off the booster, disconnecting the pedal clevis and vacuum line, then unbolting the booster from the firewall. Expect 2–4 hours of labour depending on access, and it’s wise to renew the check valve and hose if they’re tired. After fitment, set pedal free play to spec, confirm the check valve orientation, and bleed the brakes if lines were opened. A short road test and a scan of the ABS/ESC module for stored brake‑related faults rounds it out. If the pedal’s rock‑hard, the vehicle shouldn’t be driven — sort the booster before heading back on the road.

FAQs

Does the 2020 Haval H6 have a brake booster?
Yes. The 2017–2020 Haval H6 workshop documentation and dealer parts catalogues list a vacuum brake booster assembly, with a check valve and vacuum supply from the intake manifold and/or an auxiliary vacuum pump. It’s mounted on the firewall directly behind the master cylinder.

What are the signs of a failing brake booster on a 2020 H6?
Common signs include a hard brake pedal, longer stopping distances, a constant hissing noise at the pedal area, or a pedal that doesn’t sink slightly when the engine starts. Engine idle issues can also appear if the booster or its hose is leaking vacuum.

How often should the brake booster be serviced or replaced?
There’s no fixed replacement interval. Check the vacuum hose and one‑way valve at regular services (e.g., every 12 months or 20,000 km), and refresh brake fluid every two years as normal. Replace the booster only if it fails tests, leaks, or can’t hold vacuum.