2001 Mercedes-Benz ML320 problems & reliability
136 owner complaints filed with NHTSA for the 2001 Mercedes-Benz ML320. Last verified Aug 7, 2026. Complaints are unverified reports submitted by owners to the federal Office of Defects Investigation.
Each complaint is counted once (by NHTSA case number), even when it names several vehicles.
6 complaints report injuries (8 injured).
Most reported problems
| Component | Complaints | Share |
|---|---|---|
| Electronic Stability Control (esc) | 33 | 24% |
| Service Brakes | 26 | 19% |
| Steering | 25 | 18% |
| Service Brakes, Hydraulic | 19 | 14% |
| Electrical System | 16 | 12% |
| Vehicle Speed Control | 16 | 12% |
| Air Bags | 8 | 6% |
| Fuel System, Gasoline | 7 | 5% |
| Seats | 4 | 3% |
| Visibility | 4 | 3% |
Component groups as classified by NHTSA. A complaint can name more than one component, so shares may sum to more than 100%.
Common symptoms owners describe
Keyword analysis of complaint narratives; one complaint can describe several symptoms.
Mileage when problems occurred
Half of the failures with a reported odometer reading occurred by 92,000 miles (middle 50% between 54,973 and 133,425 miles), based on 103 complaints that included mileage.
Complaints by incident year
What owners report
“The failed component is the YAW rate sensor, original part number A1635426340 (ATE part number 10.0980-0454.2), manufactured by ATE. I have experienced multiple incidents of sudden, unintended braking at highway speeds. These events occurred without warning and created an immediate and significant risk of a serious…”
Vehicle Speed Control · filed Jun 18, 2026
“The contact owns a 2001 Mercedes-Benz ML320. The contact stated that the front passenger’s door failed to open more than 6 inches. The contact stated that no warning lights were illuminated. The vehicle was not taken to a dealer or independent mechanic. The vehicle was not repaired. The manufacturer was not notified…”
Latches/locks/linkages · filed Dec 30, 2024
“The contact owns a 2001 Mercedes Benz ML320. The contact stated that when they entered their vehicle and turned it on, the vehicle's passenger front door air bag made a sudden boom sound and then deployed. The contact stated that there were no warning lights. The contact had not taken the vehicle to the dealer. The…”
Air Bags · filed May 19, 2021
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Federal defect investigations
- Brake lamp switch failure.
Preliminary Evaluation PE10050 · opened Dec 21, 2010 · closed May 4, 2011 · led to recall 11V208000
- ELECTRONIC STABILITY CONTROL MALFUNCTION
Preliminary Evaluation PE07007 · opened Feb 1, 2007 · closed Jul 11, 2007
- POWER STEERING HOSE ASSEMBLY LEAKAGE
Preliminary Evaluation PE03006 · opened Feb 13, 2003 · closed Apr 4, 2003 · led to recall 03V121000
Technical service bulletins
47 manufacturer communications (TSBs, service campaigns, warranty extensions) are on file with NHTSA for the 2001 Mercedes-Benz ML320. The 10 most recent:
Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). Note: Sound file in…
LI33.30-P-056665 · Service Bulletin/Repair Instructions · issued Nov 15, 2025
Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). Note: Sound file in…
LI33.30-P-056665 · Service Bulletin/Repair Instructions · issued May 21, 2025
Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, physical fogging does not result in a…
LI82.10-P-078896 · Service Bulletin/Repair Instructions · issued Apr 28, 2025
Complaint Headlamp, front fog lamp leaky or fogged Cause Fogging of the headlamps is a natural phenomenon, which can occur under certain climatic conditions. It does not lead to any technical impairment of the headlamp…
LI82.10-P-078301 · Service Bulletin/Repair Instructions · issued Apr 28, 2025
Complaint Vehicle with atypical reduced heat output. Cause Silicate granulate may have escaped from a damaged bag in the expansion reservoir (not visible), reducing the coolant flow in the heater heat exchanger (see…
LI83.20-P-051802 · Service Bulletin/Repair Instructions · issued Apr 1, 2025
Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party during a call. It becomes increasingly…
LI82.70-P-077433 · Service Bulletin/Repair Instructions · issued Mar 5, 2025
Complaint Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The clunk is heard once when changing from forward to reverse (and vice versa). Cause If the complaint…
LI33.30-P-056665 · Service Bulletin/Repair Instructions · issued Jan 16, 2025
Complaint Washer fluid system leaks Cause Various possible causes: 1. Washer fluid reservoir itself. 2. Seal on washer fluid pump/washer fluid reservoir. 3. Washer fluid pump. 3.1. Distributor housing leaks. 3.2. Pump…
LI82.35-P-078467 · Service Bulletin/Repair Instructions · issued Oct 23, 2024
Complaint During a phone call, the called party has difficulty understanding/cannot understand the driver, or interference/background noises are audible to the called party during a call. It becomes increasingly…
LI82.70-P-077433 · Service Bulletin/Repair Instructions · issued Sep 28, 2024
Complaint Headlamps leaking or fogged Cause The fogging of the headlamp is a natural phenomenon which can occur under certain climatic conditions. In contrast to a leaky headlamp, physical fogging does not result in a…
LI82.10-P-078307 · Service Bulletin/Repair Instructions · issued Sep 21, 2024
TSBs are repair guidance manufacturers send to dealers — they are not recalls and repairs are not automatically free. Full documents are available on NHTSA’s site.
Safety recalls
No NHTSA recall campaigns name the 2001 Mercedes-Benz ML320 in our current data. Recalls may apply only to certain VIN ranges — always confirm with a VIN check.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →Buying a used 2001 Mercedes-Benz ML320?
- · Decode the seller’s VIN with our free VIN decoder to confirm the exact year, engine and trim.
- · Check for unrepaired recalls by VIN on NHTSA’s official lookup — recall repairs are free.
- · Owners most often reported problems around 92,000 miles — budget accordingly if the car is approaching that mileage.