Vacuum Reservoir Citroën Peugeot 9649508680 037007

Description

Vacuum Reservoir for Citroën, Peugeot, Ford and Volvo Vehicles with 1.6 HDi Engine

Product Overview

This vacuum reservoir (accumulator) is a direct-fit replacement for many vehicles equipped with the 1.6 HDi engine. It stores vacuum to ensure stable operation of the brake servo and other vacuum-operated systems, reducing pedal effort and improving safety under varying engine load. Suitable for professional workshops and DIY mechanics looking for a reliable OE‑style replacement. Searchable part numbers: 9649508680, 037007, Stellantis.

Compatibility And Typical Models

Fits Various Citroën And Peugeot Models Using The 1.6 HDi Engine. Also Found On Some Ford And Volvo Applications Sharing The Same Engine Family.

• Citroën Berlingo
• Citroën C3
• Citroën C3 Picasso
• Citroën C4
• Citroën C4 Picasso
• Citroën C5
• Citroën C5 X7
• Citroën Xsara Picasso
• Peugeot 206
• Peugeot 207
• Peugeot 307
• Peugeot 308
• Peugeot 407
• Peugeot Partner

How It Works

The reservoir accumulates vacuum created by the engine intake or a vacuum pump and supplies it to the brake booster and other vacuum consumers (e.g., vacuum actuators, EGR or turbo control mechanisms where applicable). By maintaining a reserve of vacuum, it prevents loss of brake assist during transient engine conditions or when the engine vacuum falls under load.

Most Common Cause Of Failure

• Ageing Or Cracking Of The Plastic Body Caused By Heat And Vibration.
• Leaking Or Brittle Vacuum Hoses And Seals Leading To Loss Of Vacuum.
• Failed Or Sticking Check Valve Causing Poor Vacuum Retention.
• Physical Damage From Road Debris Or Improper Previous Repair.

Replacement Procedure

1. Park The Vehicle On A Level Surface And Allow The Engine To Cool.
2. Locate The Vacuum Reservoir In The Engine Bay (Typically Near The Firewall Or Brake Booster).
3. Note The Orientation And Routing Of Vacuum Hoses; Photograph If Needed For Reference.
4. Remove Vacuum Hoses From The Reservoir, Inspect Hoses And Clamps, And Replace If Cracked Or Brittle.
5. Unbolt The Reservoir From Its Mounting Points And Remove It From The Vehicle.
6. Install The New Reservoir In The Correct Orientation, Refit Mounting Bolts And New Clamps Where Possible.
7. Reconnect Hoses And Ensure All Connections Are Tight And Leak-Free.
8. Start The Engine And Check For Vacuum Leaks; Confirm Proper Brake Booster Function And No Unusual Pedal Feel.

Installation Recommendations

• Always Inspect And Replace Any Associated Vacuum Hoses And Clamps When Replacing The Reservoir.
• Check The One-Way Check Valve Function; If Faulty, Replace To Ensure Vacuum Retention.
• Use Proper Mounting Hardware And Avoid Over-Tightening Plastic Fasteners.
• After Installation, Verify Brake Assist And Perform A Road Test Under Safe Conditions.
• When In Doubt, Refer To The Vehicle Service Manual For Exact Removal And Installation Procedures.

Technical Information

• Manufacturer: Stellantis
• Model: 1.6 HDi Applications (Citroën, Peugeot; Also Some Ford And Volvo Variants)
• Product Codes: 9649508680, 037007
• Additional Numbers: 037007 9649508680

Why Choose This Replacement

Replacing a worn or leaking vacuum reservoir restores proper brake assistance and the reliability of vacuum‑dependent systems. Installing a correctly sized OE‑style reservoir with the matching product codes (9649508680 / 037007) ensures correct fitment and long service life, helping to avoid intermittent braking issues and vacuum-related fault codes.